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------------------
Pylint's ChangeLog
------------------
What's New in Pylint 2.12.0?
============================
Release date: TBA
..
Put new features here and also in 'doc/whatsnew/2.12.rst'
What's New in Pylint 2.11.2?
============================
Release date: TBA
What's New in Pylint 2.11.1?
============================
Release date: 2021-09-16
..
Put bug fixes that should not wait for a new minor version here
* ``unspecified-encoding`` now checks the encoding of ``pathlib.Path()`` correctly
Closes #5017
What's New in Pylint 2.11.0?
============================
Release date: 2021-09-16
* The python3 porting mode checker and it's ``py3k`` option were removed. You can still find it in older pylint
versions.
* ``raising-bad-type`` is now properly emitted when raising a string
* Added new extension ``SetMembershipChecker`` with ``use-set-for-membership`` check:
Emitted when using an in-place defined ``list`` or ``tuple`` to do a membership test. ``sets`` are better optimized for that.
Closes #4776
* Added ``py-version`` config key (if ``[MASTER]`` section). Used for version dependant checks.
Will default to whatever Python version pylint is executed with.
* ``CodeStyleChecker``
* Added ``consider-using-assignment-expr``: Emitted when an assignment is directly followed by an if statement
and both can be combined by using an assignment expression ``:=``. Requires Python 3.8
Closes #4862
* Added ``consider-using-f-string``: Emitted when .format() or '%' is being used to format a string.
Closes #3592
* Fix false positive for ``consider-using-with`` if a context manager is assigned to a
variable in different paths of control flow (e. g. if-else clause).
Closes #4751
* https is now prefered in the documentation and http://pylint.pycqa.org correctly redirect to https://pylint.pycqa.org
Closes #3802
* Fix false positive for ``function-redefined`` for simple type annotations
Closes #4936
* Fix false positive for ``protected-access`` if a protected member is used in type hints of function definitions
* Fix false positive ``dict-iter-missing-items`` for dictionaries only using tuples as keys
Closes #3282
* The ``unspecified-encoding`` checker now also checks calls to ``pathlib.Path().read_text()``
and ``pathlib.Path().write_text()``
Closes #4945
* Fix false positive ``superfluous-parens`` for tuples created with inner tuples
Closes #4907
* Fix false positive ``unused-private-member`` for accessing attributes in a class using ``cls``
Closes #4849
* Fix false positive ``unused-private-member`` for private staticmethods accessed in classmethods.
Closes #4849
* Extended ``consider-using-in`` check to work for attribute access.
* Setting ``min-similarity-lines`` to 0 now makes the similarty checker stop checking for duplicate code
Closes #4901
* Fix a bug where pylint complained if the cache's parent directory does not exist
Closes #4900
* The ``global-variable-not-assigned`` checker now catches global variables that are never reassigned in a
local scope and catches (reassigned) functions
Closes #1375
Closes #330
* Fix false positives for invalid-all-format that are lists or tuples at runtime
Closes #4711
* Fix ``no-self-use`` and ``docparams extension`` for async functions and methods.
* Add documentation for ``pyreverse`` and ``symilar``
Closes #4616
* Non symbolic messages with the wrong capitalisation now correctly trigger ``use-symbolic-message-instead``
Closes #5000
* The ``consider-iterating-dictionary`` checker now also considers membership checks
Closes #4069
* The ``invalid-name`` message is now more detailed when using multiple naming style regexes.
What's New in Pylint 2.10.2?
============================
Release date: 2021-08-21
* We now use platformdirs instead of appdirs since the latter is not maintained.
Closes #4886
* Fix a crash in the checker raising ``shallow-copy-environ`` when failing to infer
on ``copy.copy``
Closes #4891
What's New in Pylint 2.10.1?
============================
Release date: 2021-08-20
* pylint does not crash when PYLINT_HOME does not exist.
Closes #4883
What's New in Pylint 2.10.0?
============================
Release date: 2021-08-20
* pyreverse: add option to produce colored output.
Closes #4488
* pyreverse: add output in PlantUML format.
Closes #4498
* ``consider-using-with`` is no longer triggered if a context manager is returned from a function.
Closes #4748
* pylint does not crash with a traceback anymore when a file is problematic. It
creates a template text file for opening an issue on the bug tracker instead.
The linting can go on for other non problematic files instead of being impossible.
* pyreverse: Show class has-a relationships inferred from the type-hint
Closes #4744
* Fixed a crash when importing beyond the top level package during ``import-error``
message creation
Closes #4775
* Added ``ignored-parents`` option to the design checker to ignore specific
classes from the ``too-many-ancestors`` check (R0901).
Partially closes #3057
* Added ``unspecified-encoding``: Emitted when open() is called without specifying an encoding
Closes #3826
* Improved the Similarity checker performance. Fix issue with ``--min-similarity-lines`` used with ``--jobs``.
Close #4120
Close #4118
* Don't emit ``no-member`` error if guarded behind if statement.
Ref #1162
Closes #1990
Closes #4168
* The default for ``PYLINTHOME`` is now the standard ``XDG_CACHE_HOME``, and pylint now uses ``appdirs``.
Closes #3878
* Added ``use-list-literal``: Emitted when ``list()`` is called with no arguments instead of using ``[]``
Closes #4365
* Added ``use-dict-literal``: Emitted when ``dict()`` is called with no arguments instead of using ``{}``
Closes #4365
* Added optional extension ``consider-ternary-expression``: Emitted whenever a variable is assigned in both branches of an if/else block.
Closes # 4366
* Added optional extension ``while-used``: Emitted whenever a ``while`` loop is used.
Closes # 4367
* Added ``forgotten-debug-statement``: Emitted when ``breakpoint``, ``pdb.set_trace`` or ``sys.breakpointhook`` calls are found
Closes #3692
* Fix false-positive of ``unused-private-member`` when using nested functions in a class
Closes #4673
* Fix crash for ``unused-private-member`` that occurred with nested attributes.
Closes #4755
* Fix a false positive for ``unused-private-member`` with class names
Closes #4681
* Fix false positives for ``superfluous-parens`` with walrus operator, ternary operator and inside list comprehension.
Closes #2818
Closes #3249
Closes #3608
Closes #4346
* Added ``format-string-without-interpolation`` checker: Emitted when formatting is applied to a string without any variables to be replaced
Closes #4042
* Refactor of ``--list-msgs`` & ``--list-msgs-enabled``: both options now show whether messages are emittable with the current interpreter.
Closes #4778
* Fix false negative for ``used-before-assignment`` when the variable is assigned
in an exception handler, but used outside of the handler.
Closes #626
* Added ``disable-next`` option: allows using `# pylint: disable-next=msgid` to disable a message for the following line
Closes #1682
* Added ``redundant-u-string-prefix`` checker: Emitted when the u prefix is added to a string
Closes #4102
* Fixed ``cell-var-from-loop`` checker: handle cell variables in comprehensions within functions,
and function default argument expressions. Also handle basic variable shadowing.
Closes #2846
Closes #3107
* Fixed bug with ``cell-var-from-loop`` checker: it no longer has false negatives when
both ``unused-variable`` and ``used-before-assignment`` are disabled.
* Fix false postive for ``invalid-all-format`` if the list or tuple builtin functions are used
Closes #4711
* Config files can now contain environment variables
Closes #3839
* Fix false-positive ``used-before-assignment`` with an assignment expression in a ``Return`` node
Closes #4828
* Added ``use-sequence-for-iteration``: Emitted when iterating over an in-place defined ``set``.
* ``CodeStyleChecker``
* Limit ``consider-using-tuple`` to be emitted only for in-place defined ``lists``.
* Emit ``consider-using-tuple`` even if list contains a ``starred`` expression.
* Ignore decorators lines by similarities checker when ignore signatures flag enabled
Closes #4839
* Allow ``true`` and ``false`` values in ``pylintrc`` for better compatibility with ``toml`` config.
* Class methods' signatures are ignored the same way as functions' with similarities "ignore-signatures" option enabled
Closes #4653
* Improve performance when inferring ``Call`` nodes, by utilizing caching.
* Improve error message for invalid-metaclass when the node is an Instance.
What's New in Pylint 2.9.6?
===========================
Release date: 2021-07-28
* Fix a false positive ``undefined-variable`` when variable name in decoration
matches function argument
Closes #3791
What's New in Pylint 2.9.5?
===========================
Release date: 2021-07-21
* Fix a crash when there would be a 'TypeError object does not support
item assignment' in the code we parse.
Closes #4439
* Fix crash if a callable returning a context manager was assigned to a list or dict item
Closes #4732
* Fix a crash when a AttributeInferenceError was not handled properly when
failing to infer the real name of an import in astroid.
Closes #4692
What's New in Pylint 2.9.4?
===========================
Release date: 2021-07-20
* Added ``time.clock`` to deprecated functions/methods for python 3.3
* Fix bug in which --fail-on can return a zero exit code even when the specified issue is present
Closes #4296
Closes #3363
* Fix hard failure when handling missing attribute in a class with duplicated bases
Closes #4687
* Fix false-positive ``consider-using-with`` (R1732) if a ternary conditional is used together with ``with``
Closes #4676
* Fix false-positive ``deprecated-module`` when relative import uses deprecated module name.
Closes #4629
* Fix false-positive ``consider-using-with`` (R1732) if ``contextlib.ExitStack`` takes care of calling the ``__exit__`` method
Closes #4654
* Fix a false positive for ``unused-private-member`` when mutating a private attribute
with ``cls``
Closes #4657
* Fix ignored empty functions by similarities checker with "ignore-signatures" option enabled
Closes #4652
* Fix false-positive of ``use-maxsplit-arg`` when index is incremented in
a loop
Closes #4664
* Don't emit ``cyclic-import`` message if import is guarded by ``typing.TYPE_CHECKING``.
Closes #3525
* Fix false-positive ``not-callable`` with alternative ``TypedDict`` syntax
Closes #4715
* Clarify documentation for consider-using-from-import
* Don't emit ``unreachable`` warning for empty generator functions
Closes #4698
* Don't emit ``import-error``, ``no-name-in-module``, and ``ungrouped-imports``
for imports guarded by ``sys.version_info`` or ``typing.TYPE_CHECKING``.
Closes #3285
Closes #3382
* Fix ``invalid-overridden-method`` with nested property
Closes #4368
* Fix false-positive of ``unused-private-member`` when using ``__new__`` in a class
Closes #4668
* No longer emit ``consider-using-with`` for ``ThreadPoolExecutor`` and ``ProcessPoolExecutor``
as they have legitimate use cases without a ``with`` block.
Closes #4689
* Fix crash when inferring variables assigned in match patterns
Closes #4685
* Fix a crash when a StopIteration was raised when inferring
a faulty function in a context manager.
Closes #4723
What's New in Pylint 2.9.3?
===========================
Release date: 2021-07-01
* Fix a crash that happened when analysing empty function with docstring
in the ``similarity`` checker.
Closes #4648
* The ``similarity`` checker no longer add three trailing whitespaces for
empty lines in its report.
What's New in Pylint 2.9.2?
===========================
Release date: 2021-07-01
* Fix a crash that happened when analysing code using ``type(self)`` to access
a class attribute in the ``unused-private-member`` checker.
Closes #4638
* Fix a false positive for ``unused-private-member`` when accessing a private variable
with ``self``
Closes #4644
* Fix false-positive of ``unnecessary-dict-index-lookup`` and ``consider-using-dict-items``
for reassigned dict index lookups
Closes #4630
What's New in Pylint 2.9.1?
===========================
Release date: 2021-06-30
* Upgrade astroid to 2.6.2
Closes #4631
Closes #4633
What's New in Pylint 2.9.0?
===========================
Release date: 2021-06-29
* Python 3.10 is now supported.
* Add type annotations to pyreverse dot files
Closes #1548
* Fix missing support for detecting deprecated aliases to existing
functions/methods.
Closes #4618
* astroid has been upgraded to 2.6.1
* Added various deprecated functions/methods for python 3.10, 3.7, 3.6 and 3.3
* Fix false positive ``useless-type-doc`` on ignored argument using ``pylint.extensions.docparams``
when a function was typed using pep484 but not inside the docstring.
Closes #4117
Closes #4593
* ``setuptools_scm`` has been removed and replaced by ``tbump`` in order to not
have hidden runtime dependencies to setuptools
* Fix a crash when a test function is decorated with ``@pytest.fixture`` and astroid can't
infer the name of the decorator when using ``open`` without ``with``.
Closes #4612
* Added ``deprecated-decorator``: Emitted when deprecated decorator is used.
Closes #4429
* Added ``ignore-paths`` behaviour. Defined regex patterns are matched against full file path.
Close #2541
* Fix false negative for ``consider-using-with`` if calls like ``open()`` were used outside of assignment expressions.
* The warning for ``arguments-differ`` now signals explicitly the difference it detected
by naming the argument or arguments that changed and the type of change that occurred.
* Suppress ``consider-using-with`` inside context managers.
Closes #4430
* Added ``--fail-on`` option to return non-zero exit codes regardless of ``--fail-under`` value.
* numversion tuple contains integers again to fix multiple pylint's plugins that relied on it
Closes #4420
* Fix false-positive ``too-many-ancestors`` when inheriting from builtin classes,
especially from the ``collections.abc`` module
Closes #4166
Closes #4415
* Stdlib deprecated modules check is moved to stdlib checker. New deprecated
modules are added.
* Fix raising false-positive ``no-member`` on abstract properties
* Created new error message called ``arguments-renamed`` which identifies any changes at the parameter
names of overridden functions.
Closes #3536
* New checker ``consider-using-dict-items``. Emitted when iterating over dictionary keys and then
indexing the same dictionary with the key within loop body.
Closes #3389
* Don't emit ``import-error`` if import guarded behind ``if sys.version_info >= (x, x)``
* Fix incompatibility with Python 3.6.0 caused by ``typing.Counter`` and ``typing.NoReturn`` usage
Closes #4412
* New checker ``use-maxsplit-arg``. Emitted either when accessing only the first or last
element of ``str.split()``.
Closes #4440
* Add ignore_signatures to duplicate code checker
Closes #3619
* Fix documentation errors in "Block disables" paragraph of User Guide.
* New checker ``unnecessary-dict-index-lookup``. Emitted when iterating over dictionary items
(key-value pairs) and accessing the value by index lookup.
Closes #4470
* New checker``consider-using-from-import``. Emitted when a submodule/member of a package is imported and aliased
with the same name.
Closes #2309
* Allow comma-separated list in ``output-format`` and separate output files for
each specified format.
Closes #1798
* Make ``using-constant-test`` detect constant tests consisting of list literals like ``[]`` and
``[1, 2, 3]``.
* Improved error message of ``unnecessary-comprehension`` checker by providing code suggestion.
Closes #4499
* New checker ``unused-private-member``. Emitted when a private member (i.e., starts with ``__``) of a class
is defined but not used.
Closes #4483
* Fix false negative of ``consider-using-enumerate`` when iterating over an attribute.
Closes #3657
* New checker ``invalid-class-object``. Emitted when a non-class is assigned to a ``__class__`` attribute.
Closes #585
* Fix a crash when a plugin from the configuration could not be loaded and raise an error
'bad-plugin-value' instead
Closes #4555
* Added handling of floating point values when parsing configuration from pyproject.toml
Closes #4518
* ``invalid-length-returned``, now also works when nothing at all is returned
following an upgrade in astroid.
* ``logging-format-interpolation`` and ``logging-not-lazy``, now works on logger
class created from renamed logging import following an upgrade in astroid.
* Fix false-positive ``no-member`` with generic base class
Closes PyCQA/astroid#942
* Fix ``assigning-non-slot`` false-positive with base that inherits from ``typing.Generic``
Closes #4509
Closes PyCQA/astroid#999
* New checker ``invalid-all-format``. Emitted when ``__all__`` has an invalid format,
i.e. isn't a ``tuple`` or ``list``.
* Fix false positive ``unused-variable`` and ``undefined-variable`` with
Pattern Matching in Python 3.10
* New checker ``await-outside-async``. Emitted when await is used outside an async function.
* Clarify documentation for ``typing`` extension.
Closes #4545
* Add new extension ``CodeStyleChecker``. It includes checkers that can improve code
consistency. As such they don't necessarily provide a performance benefit
and are often times opinionated.
* New checker ``consider-using-tuple``. Emitted when an in-place defined
list or set can be replaced by a tuple.
* New checker ``consider-using-namedtuple-or-dataclass``. Emitted when dictionary values
can be replaced by namedtuples or dataclass instances.
* Fix error that occurred when using ``slice`` as subscript for dict.
* Reduce false-positives around inference of ``.value`` and ``.name``
properties on ``Enum`` subclasses, following an upgrade in astroid
Closes #1932
Closes #2062
* Fix issue with ``cached_property`` that caused ``invalid-overridden-method`` error
when overriding a ``property``.
Closes #4023
* Fix ``unused-import`` false positive for imported modules referenced in
attribute lookups in type comments.
Closes #4603
What's New in Pylint 2.8.3?
===========================
Release date: 2021-05-31
* Astroid has been pinned to 2.5.6 for the 2.8 branch see #4527.
What's New in Pylint 2.8.2?
===========================
Release date: 2021-04-26
* Keep ``__pkginfo__.numversion`` a tuple to avoid breaking pylint-django.
Closes #4405
* scm_setuptools has been added to the packaging.
* Pylint's tags are now the standard form ``vX.Y.Z`` and not ``pylint-X.Y.Z`` anymore.
* New warning message ``deprecated-class``. This message is emitted if import or call deprecated class of the
standard library (like ``collections.Iterable`` that will be removed in Python 3.10).
Closes #4388
What's New in Pylint 2.8.1?
===========================
Release date: 2021-04-25
* Add numversion back (temporarily) in ``__pkginfo__`` because it broke Pylama and revert the unnecessary
``pylint.version`` breaking change.
Closes #4399
What's New in Pylint 2.8.0?
===========================
Release date: 2021-04-24
* New refactoring message ``consider-using-with``. This message is emitted if resource-allocating functions or methods of the
standard library (like ``open()`` or ``threading.Lock.acquire()``) that can be used as a context manager are called without
a ``with`` block.
Closes #3413
* Resolve false positives on unused variables in decorator functions
Closes #4252
* Add new extension ``ConfusingConsecutiveElifChecker``. This optional checker emits a refactoring message (R5601 ``confusing-consecutive-elif``)
if if/elif statements with different indentation levels follow directly one after the other.
* New option ``--output=<file>`` to output result to a file rather than printing to stdout.
Closes #1070
* Use a prescriptive message for ``unidiomatic-typecheck``
Closes #3891
* Apply ``const-naming-style`` to module constants annotated with
``typing.Final``
* The packaging is now done via setuptools exclusively. ``doc``, ``tests``, ``man``, ``elisp`` and ``Changelog`` are
not packaged anymore - reducing the size of the package by 75%.
* Debian packaging is now (officially) done in https://salsa.debian.org/python-team/packages/pylint.
* The 'doc' extra-require has been removed.
* ``__pkginfo__`` now only contain ``__version__`` (also accessible with ``pylint.__version__``), other meta-information are still
accessible with ``from importlib import metadata;metadata.metadata('pylint')``.
* COPYING has been renamed to LICENSE for standardization.
* Fix false-positive ``used-before-assignment`` in function returns.
Closes #4301
* Updated ``astroid`` to 2.5.3
Closes #2822, #4206, #4284
* Add ``consider-using-min-max-builtin`` check for if statement which could be replaced by Python builtin min or max
Closes #3406
* Don't auto-enable postponed evaluation of type annotations with Python 3.10
* Update ``astroid`` to 2.5.4
* Add new extension ``TypingChecker``. This optional checker can detect the use of deprecated typing aliases
and can suggest the use of the alternative union syntax where possible.
(For example, 'typing.Dict' can be replaced by 'dict', and 'typing.Unions' by '|', etc.)
Make sure to check the config options if you plan on using it!
* Reactivates old counts in report mode.
Closes #3819
* During detection of ``inconsistent-return-statements`` consider that ``assert False`` is a return node.
Closes #4019
* Run will not fail if score exactly equals ``config.fail_under``.
* Functions that never returns may declare ``NoReturn`` as type hints, so that
``inconsistent-return-statements`` is not emitted.
Closes #4122, #4188
* Improved protected access checks to allow access inside class methods
Closes #1159
* Fix issue with PEP 585 syntax and the use of ``collections.abc.Set``
* Fix issue that caused class variables annotated with ``typing.ClassVar`` to be
identified as class constants. Now, class variables annotated with
``typing.Final`` are identified as such.
Closes #4277
* Continuous integration with read the doc has been added.
Closes #3850
* Don't show ``DuplicateBasesError`` for attribute access
* Fix crash when checking ``setup.cfg`` for pylint config when there are non-ascii characters in there
Closes #4328
* Allow code flanked in backticks to be skipped by spellchecker
Closes #4319
* Allow Python tool directives (for black, flake8, zimports, isort, mypy, bandit, pycharm) at beginning of comments to be skipped by spellchecker
Closes #4320
* Fix issue that caused emacs pylint to fail when used with tramp
* Improve check for invalid PEP 585 syntax inside functions
if postponed evaluation of type annotations is enabled
* Improve check for invalid PEP 585 syntax as default function arguments
What's New in Pylint 2.7.4?
===========================
Release date: 2021-03-30
* Fix a problem with disabled msgid not being ignored
Closes #4265
* Fix issue with annotated class constants
Closes #4264
What's New in Pylint 2.7.3?
===========================
Release date: 2021-03-29
* Introduce logic for checking deprecated attributes in DeprecationMixin.
* Reduce usage of blacklist/whitelist terminology. Notably, ``extension-pkg-allow-list`` is an
alternative to ``extension-pkg-whitelist`` and the message ``blacklisted-name`` is now emitted as
``disallowed-name``. The previous names are accepted to maintain backward compatibility.
* Move deprecated checker to ``DeprecatedMixin``
Closes #4086
* Bump ``astroid`` version to ``2.5.2``
* Fix false positive for ``method-hidden`` when using private attribute and method
Closes #3936
* ``use-symbolic-message-instead`` now also works on legacy messages like ``C0111`` (``missing-docstring``).
* Remove unwanted print to stdout from ``_emit_no_member``
* Introduce a command-line option to specify pyreverse output directory
Closes #4159
* Fix issue with Enums and ``class-attribute-naming-style=snake_case``
Closes #4149
* Add ``allowed-redefined-builtins`` option for fine tuning ``redefined-builtin`` check.
Close #3263
* Fix issue when executing with ``python -m pylint``
Closes #4161
* Exempt ``typing.TypedDict`` from ``too-few-public-methods`` check.
Closes #4180
* Fix false-positive ``no-member`` for typed annotations without default value.
Closes #3167
* Add ``--class-const-naming-style`` for Enum constants and class variables annotated
with ``typing.ClassVar``
Closes #4181
* Fix astroid.Inference error for undefined-variables with ``len()```
Closes #4215
* Fix column index on FIXME warning messages
Closes #4218
* Improve handling of assignment expressions, better edge case handling
Closes #3763, #4238
* Improve check if class is subscriptable PEP585
* Fix documentation and filename handling of --import-graph
* Fix false-positive for ``unused-import`` on class keyword arguments
Closes #3202
* Fix regression with plugins on PYTHONPATH if latter is cwd
Closes #4252
What's New in Pylint 2.7.2?
===========================
Release date: 2021-02-28
* Fix False Positive on ``Enum.__members__.items()``, ``Enum.__members__.values``, and ``Enum.__members__.keys``
Closes #4123
* Properly strip dangerous sys.path entries (not just the first one)
Closes #3636
* Workflow and packaging improvements
What's New in Pylint 2.7.1?
===========================
Release date: 2021-02-23
* Expose ``UnittestLinter`` in pylint.testutils
* Don't check directories starting with '.' when using register_plugins
Closes #4119
What's New in Pylint 2.7.0?
===========================
Release date: 2021-02-21
* Introduce DeprecationMixin for reusable deprecation checks.
Closes #4049
* Fix false positive for ``builtin-not-iterating`` when ``map`` receives iterable
Closes #4078
* Python 3.6+ is now required.
* Fix false positive for ``builtin-not-iterating`` when ``zip`` receives iterable
* Add ``nan-comparison`` check for NaN comparisons
* Bug fix for empty-comment message line number.
Closes #4009
* Only emit ``bad-reversed-sequence`` on dictionaries if below py3.8
Closes #3940
* Handle class decorators applied to function.
Closes #3882
* Add check for empty comments
* Fix minor documentation issue in contribute.rst
* Enums are now required to be named in UPPER_CASE by ``invalid-name``.
Close #3834
* Add missing checks for deprecated functions.
* Postponed evaluation of annotations are now recognized by default if python version is above 3.10
Closes #3992
* Fix column metadata for anomalous backslash lints
* Drop support for Python 3.5
* Add support for pep585 with postponed evaluation
Closes #3320
* Check alternative union syntax - PEP 604
Closes #4065
* Fix multiple false positives with assignment expressions
Closes #3347, #3953, #3865, #3275
* Fix TypedDict inherit-non-class false-positive Python 3.9+
Closes #1927
* Fix issue with nested PEP 585 syntax
* Fix issue with nested PEP 604 syntax
* Fix a crash in ``undefined-variable`` caused by chained attributes in metaclass
Close #3742
* Fix false positive for ``not-async-context-manager`` when ``contextlib.asynccontextmanager`` is used
Close #3862
* Fix linter multiprocessing pool shutdown (triggered warnings when runned in parallels with other pytest plugins)
Closes #3779
* Fix a false-positive emission of ``no-self-use`` and ``unused-argument`` for methods
of generic structural types (`Protocol[T]`)
Closes #3885
* Fix bug that lead to duplicate messages when using ``--jobs 2`` or more.
Close #3584
* Adds option ``check-protected-access-in-special-methods`` in the ClassChecker to activate/deactivate
``protected-access`` message emission for single underscore prefixed attribute in special methods.
Close #3120
* Fix vulnerable regular expressions in ``pyreverse``
Close #3811
* ``inconsistent-return-statements`` message is now emitted if one of ``try/except`` statement
is not returning explicitly while the other do.
Closes #3468
* Fix ``useless-super-delegation`` false positive when default keyword argument is a dictionnary.
Close #3773
* Fix a crash when a specified config file does not exist
* Add support to ``ignored-argument-names`` in DocstringParameterChecker and adds ``useless-param-doc`` and ``useless-type-doc`` messages.
Close #3800
* Enforce docparams consistently when docstring is not present
Close #2738
* Fix ``duplicate-code`` false positive when lines only contain whitespace and non-alphanumeric characters (e.g. parentheses, bracket, comma, etc.)
* Improve lint message for ``singleton-comparison`` with bools
* Fix spell-checker crash on indented docstring lines that look like # comments
Close #3786
* Fix AttributeError in checkers/refactoring.py
* Improve sphinx directives spelling filter
* Fix a bug with postponed evaluation when using aliases for annotations.
Close #3798
* Fix minor documentation issues
* Improve the performance of the line length check.
* Removed incorrect deprecation of ``inspect.getfullargspec``
* Fix ``signature-differs`` false positive for functions with variadics
Close #3737
* Fix a crash in ``consider-using-enumerate`` when encountering ``range()`` without arguments
Close #3735
* ``len-as-conditions`` is now triggered only for classes that are inheriting directly from list, dict, or set and not implementing the ``__bool__`` function, or from generators like range or list/dict/set comprehension. This should reduce the false positives for other classes, like pandas's DataFrame or numpy's Array.
Close #1879
* Fixes duplicate-errors not working with -j2+
Close #3314
* ``generated-members`` now matches the qualified name of members
Close #2498
* Add check for bool function to ``len-as-condition``
* Add ``simplifiable-condition`` check for extraneous constants in conditionals using and/or.
* Add ``condition-evals-to-constant`` check for conditionals using and/or that evaluate to a constant.
Close #3407
* Changed setup.py to work with `distlib <https://pypi.org/project/distlib>`_
Close #3555
* New check: ``consider-using-generator``
This check warns when a comprehension is used inside an ``any`` or ``all`` function,
since it is unnecessary and should be replaced by a generator instead.
Using a generator would be less code and way faster.
Close #3165
* Add Github Actions to replace Travis and AppVeyor in the future
What's New in Pylint 2.6.1?
===========================
Release date: 2021-02-16
* Astroid version has been set as < 2.5
Close #4093
What's New in Pylint 2.6.0?
===========================
Release date: 2020-08-20
* Fix various scope-related bugs in ``undefined-variable`` checker
Close #1082, #3434, #3461
* bad-continuation and bad-whitespace have been removed, black or another formatter can help you with this better than Pylint
Close #246, #289, #638, #747, #1148, #1179, #1943, #2041, #2301, #2304, #2944, #3565
* The no-space-check option has been removed. It's no longer possible to consider empty line like a ``trailing-whitespace`` by using clever options
Close #1368
* ``missing-kwoa`` is no longer emitted when dealing with overload functions
Close #3655
* mixed-indentation has been removed, it is no longer useful since TabError is included directly in python3
Close #2984 #3573
* Add ``super-with-arguments`` check for flagging instances of Python 2 style super calls.
* Add an faq detailing which messages to disable to avoid duplicates w/ other popular linters
* Fix superfluous-parens false-positive for the walrus operator
Close #3383
* Fix ``fail-under`` not accepting floats
* Fix a bug with ``ignore-docstrings`` ignoring all lines in a module
* Fix ``pre-commit`` config that could lead to undetected duplicate lines of code
* Fix a crash in parallel mode when the module's filepath is not set
Close #3564
* Add ``raise-missing-from`` check for exceptions that should have a cause.
* Support both isort 4 and isort 5. If you have pinned isort 4 in your projet requirements, nothing changes. If you use isort 5, though, note that the ``known-standard-library`` option is not interpreted the same in isort 4 and isort 5 (see the migration guide in isort documentation for further details). For compatibility's sake for most pylint users, the ``known-standard-library`` option in pylint now maps to ``extra-standard-library`` in isort 5. If you really want what ``known-standard-library`` now means in isort 5, you must disable the ``wrong-import-order`` check in pylint and run isort manually with a proper isort configuration file.
Close #3722
* Fix a crash caused by not guarding against ``InferenceError`` when calling ``infer_call_result``
Close #3690
* Fix a crash in parallel mode when the module's filepath is not set
Close #3564
What's New in Pylint 2.5.3?
===========================
Release date: 2020-06-8
* Fix a regression where disable comments that have checker names with numbers in them are not parsed correctly
Close #3666
* ``property-with-parameters`` properly handles abstract properties
Close #3600
* ``continue-in-finally`` no longer emitted on Python 3.8 where it's now valid
Close #3612
* Fix a regression where messages with dash are not fully parsed
Close #3604
* In a TOML configuration file, it's now possible to use rich (non-string) types, such as list, integer or boolean instead of strings. For example, one can now define a *list* of message identifiers to enable like this::
enable = [
"use-symbolic-message-instead",
"useless-suppression",
]
Close #3538
* Fix a regression where the score was not reported with multiple jobs
Close #3547
* Protect against ``AttributeError`` when checking ``cell-var-from-loop``
Close #3646
What's New in Pylint 2.5.2?
===========================
Release date: 2020-05-05
* ``pylint.Run`` accepts ``do_exit`` as a deprecated parameter
Close #3590
What's New in Pylint 2.5.1?
===========================
Release date: 2020-05-05
* Fix a crash in ``method-hidden`` lookup for unknown base classes
Close #3527
* Revert pylint.Run's ``exit`` parameter to ``do_exit``
This has been inadvertently changed several releases ago to ``do_exit``.
Close #3533
* ``no-value-for-parameter`` variadic detection has improved for assign statements
Close #3563
* Allow package files to be properly discovered with multiple jobs
Close #3524
* Allow linting directories without ``__init__.py`` which was a regression in 2.5.
Close #3528
What's New in Pylint 2.5.0?
===========================
Release date: 2020-04-27
* Fix a false negative for ``undefined-variable`` when using class attribute in comprehension.
Close #3494
* Fix a false positive for ``undefined-variable`` when using class attribute in decorator or as type hint.
Close #511
Close #1976
* Remove HTML quoting of messages in JSON output.
Close #2769
* Adjust the ``invalid-name`` rule to work with non-ASCII identifiers and add the ``non-ascii-name`` rule.
Close #2725
* Positional-only arguments are taken in account for ``useless-super-delegation``
* ``unidiomatic-typecheck`` is no longer emitted for ``in`` and ``not in`` operators
Close #3337
* Positional-only argument annotations are taken in account for ``unused-import``
Close #3462
* Add a command to list available extensions.
* Allow used variables to be properly consumed when different checks are enabled / disabled
Close #3445
* Fix dangerous-default-value rule to account for keyword argument defaults
Close #3373
* Fix a false positive of ``self-assigning-variable`` on tuple unpacking.
Close #3433
* ``no-self-use`` is no longer emitted for typing stubs.
Close #3439
* Fix a false positive for ``undefined-variable`` when ``__class__`` is used
Close #3090
* Emit ``invalid-name`` for variables defined in loops at module level.
Close #2695
* Add a check for cases where the second argument to ``isinstance`` is not a type.
Close #3308
* Add 'notes-rgx' option, to be used for fixme check.
Close #2874
* ``function-redefined`` exempts function redefined on a condition.
Close #2410
* ``typing.overload`` functions are exempted from docstring checks
Close #3350
* Emit ``invalid-overridden-method`` for improper async def overrides.
Close #3355
* Do not allow ``python -m pylint ...`` to import user code
``python -m pylint ...`` adds the current working directory as the first element
of ``sys.path``. This opens up a potential security hole where ``pylint`` will import
user level code as long as that code resides in modules having the same name as stdlib
or pylint's own modules.
Close #3386
* Add ``dummy-variables-rgx`` option for ``_redeclared-assigned-name`` check.
Close #3341
* Fixed graph creation for relative paths
* Add a check for asserts on string literals.
Close #3284
* ``not in`` is considered iterating context for some of the Python 3 porting checkers.
* A new check ``inconsistent-quotes`` was added.
* Add a check for non string assignment to __name__ attribute.
Close #583
* ``__pow__``, ``__imatmul__``, ``__trunc__``, ``__floor__``, and ``__ceil__`` are recognized as special method names.
Close #3281
* Added errors for protocol functions when invalid return types are detected.
E0304 (invalid-bool-returned): __bool__ did not return a bool
E0305 (invalid-index-returned): __index__ did not return an integer
E0306 (invalid-repr-returned): __repr__ did not return a string
E0307 (invalid-str-returned): __str__ did not return a string
E0308 (invalid-bytes-returned): __bytes__ did not return a string
E0309 (invalid-hash-returned): __hash__ did not return an integer
E0310 (invalid-length-hint-returned): __length_hint__ did not return a non-negative integer
E0311 (invalid-format-returned): __format__ did not return a string
E0312 (invalid-getnewargs-returned): __getnewargs__ did not return a tuple
E0313 (invalid-getnewargs-ex-returned): __getnewargs_ex__ did not return a tuple of the form (tuple, dict)
Close #560
* ``missing-*-docstring`` can look for ``__doc__`` assignments.
Close #3301
* ``undefined-variable`` can now find undefined loop iterables
Close #498
* ``safe_infer`` can infer a value as long as all the paths share the same type.
Close #2503
* Add a --fail-under <score> flag, also configurable in a .pylintrc file. If the final score is more than the specified score, it's considered a success and pylint exits with exitcode 0. Otherwise, it's considered a failure and pylint exits with its current exitcode based on the messages issued.
Close #2242
* Don't emit ``line-too-long`` for multilines when ``disable=line-too-long`` comment stands at their end
Close #2957
* Fixed an ``AttributeError`` caused by improper handling of ``dataclasses`` inference in ``pyreverse``
Close #3256
* Do not exempt bare except from ``undefined-variable`` and similar checks
If a node was wrapped in a ``TryExcept``, ``pylint`` was taking a hint
from the except handler when deciding to emit or not a message.
We were treating bare except as a fully fledged ignore but only
the corresponding exceptions should be handled that way (e.g. ``NameError`` or ``ImportError``)
Close #3235
* No longer emit ``assignment-from-no-return`` when a function only raises an exception
Close #3218
* Allow import aliases to exempt ``import-error`` when used in type annotations.
Close #3178
* ``Ellipsis` is exempted from ``multiple-statements`` for function overloads.
Close #3224
* No longer emit ``invalid-name`` for non-constants found at module level.
Pylint was taking the following statement from PEP-8 too far, considering
all module level variables as constants, which is not what the statement is saying:
`Constants are usually defined on a module level and written in
all capital letters with underscores separating words.`
Close #3111
Close #3132
* Allow ``implicit-str-concat-in-sequence`` to be emitted for string juxtaposition
Close #3030
* ``implicit-str-concat-in-sequence`` was renamed ``implicit-str-concat``
* The ``json`` reporter no longer bypasses ``redirect_stdout``. Close #3227
* Move ``NoFileError``, ``OutputLine``, ``FunctionalTestReporter``,
``FunctionalTestFile``, ``LintModuleTest`` and related methods from
``test_functional.py`` to ``pylint.testutils`` to help testing for 3rd
party pylint plugins.
* Can read config from a setup.cfg or pyproject.toml file.
Close #617
* Fix exception-escape false positive with generators
Close #3128
* ``inspect.getargvalues`` is no longer marked as deprecated.
* A new check ``f-string-without-interpolation`` was added
Close #3190
* Flag mutable ``collections.*`` utilities as dangerous defaults
Close #3183
* ``docparams`` extension supports multiple types in raises sections.
Multiple types can also be separated by commas in all valid sections.
Closes #2729
* Allow parallel linting when run under Prospector
* Fixed false positives of ``method-hidden`` when a subclass defines the method that is being hidden.
Closes #414
* Python 3 porting mode is 30-50% faster on most codebases
* Python 3 porting mode no longer swallows syntax errors
Closes #2956
* Pass the actual PyLinter object to sub processes to allow using custom
PyLinter classes.
PyLinter object (and all its members except reporter) needs to support
pickling so the PyLinter object can be passed to worker processes.
* Clean up setup.py
Make pytest-runner a requirement only if running tests, similar to McCabe.
Clean up the setup.py file, resolving a number of warnings around it.
* Handle SyntaxError in files passed via ``--from-stdin`` option
Pylint no longer outputs a traceback, if a file, read from stdin,
contains a syntaxerror.
* Fix uppercase style to disallow 3+ uppercase followed by lowercase.
* Fixed ``undefined-variable`` and ``unused-import`` false positives
when using a metaclass via an attribute.
Close #1603
* Emit ``unused-argument`` for functions that partially uses their argument list before raising an exception.
Close #3246
* Fixed ``broad_try_clause`` extension to check try/finally statements and to
check for nested statements (e.g., inside of an ``if`` statement).
* Recognize classes explicitly inheriting from ``abc.ABC`` or having an
``abc.ABCMeta`` metaclass as abstract. This makes them not trigger W0223.
Closes #3098
* Fix overzealous ``arguments-differ`` when overridden function uses variadics
No message is emitted if the overriding function provides positional or
keyword variadics in its signature that can feasibly accept and pass on
all parameters given by the overridden function.
Close #1482
Close #1553
* Multiple types of string formatting are allowed in logging functions.
The ``logging-fstring-interpolation`` message has been brought back to allow
multiple types of string formatting to be used.
Close #3361
What's New in Pylint 2.4.4?
===========================
Release date: 2019-11-13
* Exempt all the names found in type annotations from ``unused-import``
The previous code was assuming that only ``typing`` names need to be
exempted, but we need to do that for the rest of the type comment
names as well.
Close #3112
* Relax type import detection for names that do not come from the ``typing`` module
Close #3191
What's New in Pylint 2.4.3?
===========================
Release date: 2019-10-18
* Fix an issue with ``unnecessary-comprehension`` in comprehensions with additional repacking of elements.
Close #3148
* ``import-outside-toplevel`` is emitted for ``ImportFrom`` nodes as well.
Close #3175
* Do not emit ``no-method-argument`` for functions using positional only args.
Close #3161
* ``consider-using-sys-exit`` is no longer emitted when ``exit`` is imported in the local scope.
Close #3147
* ``invalid-overridden-method`` takes ``abc.abstractproperty`` in account
Close #3150
* Fixed ``missing-yield-type-doc`` getting incorrectly raised when
a generator does not document a yield type but has a type annotation.
Closes #3185
* ``typing.overload`` functions are exempted from ``too-many-function-args``
Close #3170
What's New in Pylint 2.4.2?
===========================
Release date: 2019-09-30
* ``ignored-modules`` can skip submodules. Close #3135
* ``self-assigning-variable`` skips class level assignments.
Close #2930
* ``consider-using-sys-exit`` is exempted when ``exit()`` is imported from ``sys``
Close #3145
* Exempt annotated assignments without variable from ``class-variable-slots-conflict``
Close #3141
* Fix ``utils.is_error`` to account for functions returning early.
This fixes a false negative with ``unused-variable`` which was no longer triggered
when a function raised an exception as the last instruction, but the body of the function
still had unused variables.
Close #3028
What's New in Pylint 2.4.1?
===========================
Release date: 2019-09-25
* Exempt type checking definitions defined in both clauses of a type checking guard
Close #3127
* Exempt type checking definitions inside the type check guard
In a7f236528bb3758886b97285a56f3f9ce5b13a99 we added basic support
for emitting ``used-before-assignment`` if a variable was only defined
inside a type checking guard (using ``TYPE_CHECKING`` variable from `typing`)
Unfortunately that missed the case of using those type checking imports
inside the guard itself, which triggered spurious used-before-assignment errors.
Close #3119
* Require astroid >= 2.3 to avoid any compatibility issues.
What's New in Pylint 2.4.0?
===========================
Release date: 2019-09-24
* New check: ``import-outside-toplevel``
This check warns when modules are imported from places other than a
module toplevel, e.g. inside a function or a class.
* Handle inference ambiguity for ``invalid-format-index``
Close #2752
* Removed Python 2 specific checks such as ``relative-import``,
``invalid-encoded-data``, ``missing-super-argument``.
* Support forward references for ``function-redefined`` check.
Close #2540
* Handle redefinitions in case of type checking imports.
Close #2834
* Added a new check, ``consider-using-sys-exit``
This check is emitted when we detect that a quit() or exit() is invoked
instead of sys.exit(), which is the preferred way of exiting in program.
Close #2925
* ``useless-suppression`` check now ignores ``cyclic-import`` suppressions,
which could lead to false postiives due to incomplete context at the time
of the check.
Close #3064
* Added new checks, ``no-else-break`` and ``no-else-continue``
These checks highlight unnecessary ``else`` and ``elif`` blocks after
``break`` and ``continue`` statements.
Close #2327
* Don't emit ``protected-access`` when a single underscore prefixed attribute
is used inside a special method
Close #1802
* Fix the "statement" values in the PyLinter's stats reports by module.
* Added a new check, ``invalid-overridden-method``
This check is emitted when we detect that a method is overridden
as a property or a property is overridden as a method. This can indicate
a bug in the application code that will trigger a runtime error.
Close #2670
* Added a new check, ``arguments-out-of-order``
This check warns if you have arguments with names that match those in
a function's signature but you are passing them in to the function
in a different order.
Close #2975
* Added a new check, ``redeclared-assigned-name``
This check is emitted when ``pylint`` detects that a name
was assigned one or multiple times in the same assignment,
which indicate a potential bug.
Close #2898
* Ignore lambda calls with variadic arguments without a context.
Inferring variadic positional arguments and keyword arguments
will result into empty Tuples and Dicts, which can lead in
some cases to false positives with regard to no-value-for-parameter.
In order to avoid this, until we'll have support for call context
propagation, we're ignoring such cases if detected.
We already did that for function calls, but the previous fix
was not taking in consideration ``lambdas``
Close #2918
* Added a new check, ``self-assigning-variable``
This check is emitted when we detect that a variable is assigned
to itself, which might indicate a potential bug in the code application.
Close #2930
* Added a new check, ``property-with-parameters``.
This check is emitted when we detect that a defined property also
has parameters, which are useless.
Close #3006
* Excluded protocol classes from a couple of checks. Close #3002.
* Add a check ``unnecessary-comprehension`` that detects unnecessary comprehensions.
This check is emitted when ``pylint`` finds list-, set- or dict-comprehensions,
that are unnecessary and can be rewritten with the list-, set- or dict-constructors.
Close #2905
* Excluded PEP 526 instance and class variables from ``no-member``. Close #2945
* Excluded ``attrs`` from ``too-few-public-methods`` check. Close #2988.
* ``unused-import`` emitted for the right import names in function scopes.
Close #2928
* Dropped support for Python 3.4.
* ``assignment-from-no-return`` not triggered for async methods.
Close #2902
* Don't emit ``attribute-defined-outside-init`` for variables defined in setters.
Close #409
* Syntax errors report the column number.
Close #2914
* Support fully qualified typing imports for type annotations.
Close #2915
* Exclude ``__dict__`` from ``attribute-defined-outside-init``
* Fix pointer on spelling check when the error are more than one time in the same line.
Close #2895
* Fix crash happening when parent of called object cannot be determined
* Allow of in ``GoogleDocstring.re_multiple_type``
* Added ``subprocess-run-check`` to handle subrocess.run without explicitly set ``check`` keyword.
Close #2848
* When we can't infer bare except handlers, skip ``try-except-raise``
Close #2853
* Handle more ``unnecessary-lambda`` cases when dealing with additional kwargs in wrapped calls
Close #2845
* Better postponed evaluation of annotations handling
Close #2847
* Support postponed evaluation of annotations for variable annotations.
Close #2838
* ``epylint.py_run`` defaults to ``python`` in case the current executable is not a Python one.
Close #2837
* Ignore raw docstrings when running Similarities checker with ``ignore-docstrings=yes`` option
* Fix crash when calling ``inherit_from_std_ex`` on a class which is its own ancestor
Close #2680
* Added a new check that warns the user if a function call is used inside a test but parentheses are missing.
Close #2658
* ``len-as-condition`` now only fires when a ``len(x)`` call is made without an explicit comparison
The message and description accompanying this checker has been changed
reflect this new behavior, by explicitly asking to either rely on the
fact that empty sequence are false or to compare the length with a scalar.
Close #2684
* Add ``preferred-module`` checker that notify if an import has a replacement module that should be used.
This check is emitted when ``pylint`` finds an imported module that has a
preferred replacement listed in ``preferred-modules``.
* ``assigning-non-slot`` not emitted for classes with unknown base classes.
Close #2807
* ``old-division`` is not emitted for non-Const nodes.
Close #2808
* Added method arguments to the dot writer for pyreverse.
Close #2139
* Support for linting file from stdin.
IDEs may benefit from the support for linting from an in-memory file.
Close #1187
* Added a new check ``class-variable-slots-conflict``
This check is emitted when ``pylint`` finds a class variable that conflicts with a slot
name, which would raise a ``ValueError`` at runtime.
* Added new check: dict-iter-missing-items (E1141)
Close #2761
* Fix issue with pylint name in output of python -m pylint --version
Close #2764
* Relicense logo material under the CC BY-SA 4.0 license.
* Skip ``if`` expressions from f-strings for the ``check_elif`` checker
Close #2816
* C0412 (ungrouped-import) is now compatible with isort.
Close #2806
* Added new extension to detect too much code in a try clause
Close #2877
* ``signature-mutators`` option was added
With this option, users can choose to ignore ``too-many-function-args``, ``unexpected-keyword-arg``,
and ``no-value-for-parameter`` for functions decorated with decorators that change
the signature of a decorated function.
Close #259
* Fixed a pragma comment on its own physical line being ignored when part
of a logical line with the previous physical line.
Close #199
* Fixed false ``undefined-loop-variable`` for a function defined in the loop,
that uses the variable defined in that loop.
Close #202
* Fixed ``unused-argument`` and ``function-redefined`` getting raised for
functions decorated with ``typing.overload``.
Close #1581
* Fixed a false positive with ``consider-using-dict-comprehension`` for constructions that can't be converted to a comprehension
Close #2963
* Added ``__post_init__`` to ``defining-attr-methods`` in order to avoid ``attribute-defined-outside-init`` in dataclasses.
Close #2581
* Changed description of W0199 to use the term 2-item-tuple instead of 2-uple.
* Allow a ``.`` as a prefix for Sphinx name resolution.
* Checkers must now keep a 1 to 1 relationship between "msgid" (ie: C1234) and "symbol" (ie : human-readable-symbol)
* In checkers, an old_names can now be used for multiple new messages and pylint is now a little faster
Caused by #1164. It means if you do a partial old_names for a message definition an exception will tell you that you
must rename the associated identification.
* Allow the choice of f-strings as a valid way of formatting logging strings.
Closes #2395
* Added ``--list-msgs-enabled`` command to list all enabled and disabled messages given the current RC file and command line arguments.
What's New in Pylint 2.3.0?
===========================
Release date: 2019-02-27
* Protect against ``NonDeducibleTypeHierarchy`` when calling semi-private ``is_subtype``
``astroid.helpers.is_subtype`` raises ``NonDeducibleTypeHierarchy`` when it cannot infer
the base classes of the given types, but that makes sense in its context given that
the method is mostly used to inform the inference process about the hierarchy of classes.
Doesn't make that much sense for ``pylint`` itself, which is why we're handling the
exception here, rather than in ``astroid``
Close PyCQA/astroid#644
* Added a new command line option ``list-groups`` for listing all the check groups ``pylint`` knows about.
* Allow ``BaseException`` for emitting ``broad-except``, just like ``Exception``.
Close #2741
* Fixed a crash that occurred for ``bad-str-strip-call`` when ``strip()`` received ``None``
Close #2743
* Don't emit ``*-not-iterating`` checks for builtins consumed by ``itertools``
Close #2731
* Fix a crash caused by iterating over ``Uninferable`` in a string formatting check.
Close #2727
* Fixed false positives for ``no-self-argument`` and ``unsubscriptable-object`` when using ``__class_getitem__`` (new in Python 3.7)
Close #2416
* Support ``Ellipsis`` as a synonym for ``pass`` statements.
Close #2718
* ``fixme`` gets triggered only on comments.
Close #2321
* Fixed a false positive for ``unused-variable`` and ``nonlocal`` assignments
Close #2671
* Added ``load_configuration()`` hook for plugins
New optional hook for plugins is added: ``load_configuration()``.
This hook is executed after configuration is loaded to prevent
overwriting plugin specific configuration via user-based
configuration.
Close #2635
* Fix missing-raises-doc false positive (W9006)
Close #1502
* Exempt starred unpacking from ``*-not-iterating`` Python 3 checks
Close #2651
* Make ``compare-to-zero`` less zealous by checking against equality and identity
Close #2645
* Add ``no-else-raise`` warning (R1720)
Close #2558
* Exempt ``yield from`` from ``*-not-iterating`` Python 3 checks.
Close #2643
* Fix incorrect generation of ``no-else-return`` warnings (R1705)
Fixed issue where ``if`` statements with nested ``if`` statements
were incorrectly being flagged as ``no-else-return`` in some cases and
not being flagged as ``no-else-return`` in other cases. Added tests
for verification and updated pylint source files to eliminate newly
exposed warnings.
* Fix false positive with ``not-async-context-manager`` caused by not understanding ``contextlib.asynccontextmanager``
Close #2440
* Refactor ``bad-reversed-sequence`` to account for more objects that can define ``__reversed__``
One such object would be an enum class, for which ``__reversed__`` yields each individual enum.
As such, the check for ``bad-reversed-sequence`` needs to not differentiate between classes
and instances when it comes for checking of ``__reversed__`` presence.
Close #2598
* Added ``wrong-exception-operation``
Used when an operation is done against an exception, but the operation
is not valid for the exception in question. Usually emitted when having
binary operations between exceptions in except handlers.
Close #2494
* ``no-member`` is emitted for enums when they lack a member
Previously we weren't doing this because we detected a
``__getattr__`` implementation on the ``Enum`` class
(and this check is skipped for classes with ``__getattr__``),
but that is fine for Enums, given that they are inferred in a customised
way in astroid.
Close #2565
* Generalize ``chained-comparison``
Previous version incorrectly detects `a < b < c and b < d` and fails to
detect `a < b < c and c < d`.
* Avoid popping __main__ when using multiple jobs
Close #2689
* Add a new option 'check-str-concat-over-line-jumps' to check 'implicit-str-concat-in-sequence'
* Fixes for the new style logging format linter.
The number of arguments was not handled properly, leading to an always
successful check.
* Fix false positive ``not-callable`` for uninferable properties.
* Fix false positive ``useless-else-on-loop`` if the break is deep in the else
of an inner loop.
* Minor improvements to the help text for a few options.
What's New in Pylint 2.2.2?
===========================
Release date: 2018-11-28
* Change the ``logging-format-style`` to use name identifier instead of their
corresponding Python identifiers
This is to prevent users having to think about escaping the default value for
``logging-format-style`` in the generated config file. Also our config parsing
utilities don't quite support escaped values when it comes to ``choices`` detection,
so this would have needed various hacks around that.
Closes #2614
What's New in Pylint 2.2.1?
===========================
Release date: 2018-11-27
* Fix a crash caused by ``implicit-str-concat-in-sequence`` and multi-bytes characters.
Closes #2610
What's New in Pylint 2.2?
=========================
Release date: 2018-11-25
* Consider ``range()`` objects for ``undefined-loop-variable`` leaking from iteration.
Close #2533
* ``deprecated-method`` can use the attribute name for identifying a deprecated method
Previously we were using the fully qualified name, which we still do, but the fully
qualified name for some ``unittest`` deprecated aliases leads to a generic
deprecation function. Instead on relying on that, we now also rely on the attribute
name, which should solve some false positives.
Close #1653
Close #1946
* Fix compatibility with changes to stdlib tokenizer.
* ``pylint`` is less eager to consume the whole line for pragmas
Close #2485
* Obtain the correct number of CPUs for virtualized or containerized environments.
Close #2519
* Change ``unbalanced-tuple-unpacking`` back to a warning.
It used to be a warning until a couple of years ago, after it was promoted to
an error. But the check might be suggesting the wrong thing in some cases,
for instance when checking against ``sys.argv`` which cannot be known at static
analysis time. Given it might rely on potential unknown data, it's best to
have it as a warning.
Close #2522
* Remove ``enumerate`` usage suggestion when defining ``__iter__`` (C0200)
Close #2477
* Emit ``too-many-starred-assignment`` only when the number of Starred nodes is per assignment elements
Close #2513
* ``try-except-raise`` checker now handles multilevel inheritance hirerachy for exceptions correctly.
Close #2484
* Add a new check, ``simplifiable-if-expression`` for expressions like ``True if cond else False``.
Close #2487
* ``too-few-public-methods`` is not reported for ``typing.NamedTuple``
Close #2459
* ```too-few-public-methods`` is not reported for dataclasses created with options.
Close #2488
* Remove wrong modules from 'bad-python3-import'.
Close #2453
* The ``json`` reporter prints an empty list when no messages are emitted
Close #2446
* Add a new check, ``duplicate-string-formatting-argument``
This new check is emitted whenever a duplicate string formatting argument
is found.
Close #497
* ``assignment-from-no-return`` is not emitted for coroutines.
Close #1715
* Report format string type mismatches.
* ``consider-using-ternary`` and ``simplified-boolean-expression`` no longer emit for sequence based checks
Close #2473
* Handle ``AstroidSyntaxError`` when trying to import a module.
Close #2313
* Allow ``__module__`` to be redefined at a class level. Close #2451
* ``pylint`` used to emit a ``unused-variable`` error if unused import was found in the function. Now instead of
``unused-variable``, ``unused-import`` is emitted.
Close #2421
* Handle asyncio.coroutine when looking for ``not-an-iterable`` check.
Close #996
* The ``locally-enabled`` check is gone.
Close #2442
* Infer decorated methods when looking for method-hidden
Close #2369
* Pick the latest value from the inferred values when looking for ``raising-non-exception``
Close #2431
* Extend the TYPE_CHECKING guard to TYPE_CHECKING name as well, not just the attribute
Close #2411
* Ignore import x.y.z as z cases for checker ``useless-import-alias``.
Close #2309
* Fix false positive ``undefined-variable`` and ``used-before-assignment`` with nonlocal keyword usage.
Close #2049
* Stop ``protected-access`` exception for missing class attributes
* Don't emit ``assignment-from-no-return`` for decorated function nodes
Close #2385
* ``unnecessary-pass`` is now also emitted when a function or class contains only docstring and pass statement.
In Python, stubbed functions often have a body that contains just a single ``pass`` statement,
indicating that the function doesn't do anything. However, a stubbed function can also have just a
docstring, and function with a docstring and no body also does nothing.
Close #2208
* ``duplicate-argument-name`` is emitted for more than one duplicate argument per function
Close #1712
* Allow double indentation levels for more distinguishable indentations
Close #741
* Consider tuples in exception handler for ``try-except-raise``.
Close #2389
* Fix astroid.ClassDef check in checkers.utils.is_subclass_of
* Fix wildcard imports being ignored by the import checker
* Fix external/internal distinction being broken in the import graph
* Fix wildcard import check not skipping ``__init__.py``
Close #2430
* Add new option to logging checker, ``logging_format_style``
* Fix --ignore-imports to understand multi-line imports
Close #1422
Close #2019
* Add a new check 'implicit-str-concat-in-sequence' to spot string concatenation inside lists, sets & tuples.
* ``literal-comparison`` is now emitted for 0 and 1 literals.
What's New in Pylint 2.1.1?
===========================
Release date: 2018-08-07
* fix pylint crash due to ``misplaced-format-function`` not correctly handling class attribute.
Close #2384
* Do not emit \*-builtin for Python 3 builtin checks when the builtin is used inside a try-except
Close PyCQA/pylint#2228
* ``simplifiable-if-statement`` not emitted when dealing with subscripts
What's New in Pylint 2.1?
=========================
Release date: 2018-08-01
* ``trailing-comma-tuple`` gets emitted for ``yield`` statements as well.
Close #2363
* Get only the arguments of the scope function for ``redefined-argument-from-local``
Close #2364
* Add a check ``misplaced-format-function`` which is emitted if format function is used on
non str object.
Close #2200
* ``chain.from_iterable`` no longer emits `dict-{}-not-iterating` when dealing with dict values and keys
* Demote the ``try-except-raise`` message from an error to a warning (E0705 -> W0706)
Close #2323
* Correctly handle the new name of the Python implementation of the ``abc`` module.
Close PyCQA/astroid#2288
* Modules with ``__getattr__`` are exempted by default from ``no-member``
There's no easy way to figure out if a module has a particular member when
the said module uses ``__getattr__``, which is a new addition to Python 3.7.
Instead we assume the safe thing to do, in the same way we do for classes,
and skip those modules from checking.
Close #2331
* Fix a false positive ``invalid name`` message when method or attribute name is longer then 30 characters.
Close #2047
* Include the type of the next branch in ``no-else-return``
Close #2295
* Fix inconsistent behaviour for bad-continuation on first line of file
Close #2281
* Fix not being able to disable certain messages on the last line through
the global disable option
Close #2278
* Don't emit ``useless-return`` when we have a single statement that is the return itself
We still want to be explicit when a function is supposed to return
an optional value; even though ``pass`` could still work, it's not explicit
enough and the function might look like it's missing an implementation.
Close #2300
* Fix false-positive undefined-variable for self referential class name in lamdbas
Close #704
* Don't crash when ``pylint`` is unable to infer the value of an argument to ``next()``
Close #2316
* Don't emit ``not-an-iterable`` when dealing with async iterators.
But do emit it when using the usual iteration protocol against
async iterators.
Close #2311
* Can specify a default docstring type for when the check cannot guess the type
Close #1169
What's New in Pylint 2.0?
=========================
Release date: 2018-07-15
* ``try-except-raise`` should not be emitted if there are any parent exception class handlers.
Close #2284
* ``trailing-comma-tuple`` can be emitted for ``return`` statements as well.
Close #2269
* Fix a false positive ``inconsistent-return-statements`` message when exception is raised
inside an else statement.
Close #1782
* ``ImportFrom`` nodes correctly use the full name for the import sorting checks.
Close #2181
* [].extend and similar builtin operations don't emit `dict-*-not-iterating` with the Python 3 porting checker
Close #2187
* Add a check ``consider-using-dict-comprehension`` which is emitted if for dict initialization
the old style with list comprehensions is used.
* Add a check ``consider-using-set-comprehension`` which is emitted if for set initialization
the old style with list comprehensions is used.
* ``logging-not-lazy`` is emitted whenever pylint infers that a string is built with addition
Close #2193
* Add a check ``chained-comparison`` which is emitted if a boolean operation can be simplified
by chaining some of its operations.
e.g "a < b and b < c", can be simplified as "a < b < c".
Close #2032
* Add a check ``consider-using-in`` for comparisons of a variable against
multiple values with "==" and "or"s instead of checking if the variable
is contained "in" a tuple of those values.
* ``in`` is considered iterating context for some of the Python 3 porting checkers
Close #2186
* Add ``--ignore-none`` flag to control if pylint should warn about ``no-member`` where the owner is None
* Fix a false positive related to ``too-many-arguments`` and bounded ``__get__`` methods
Close #2172
* ``mcs`` as the first parameter of metaclass's ``__new__`` method was replaced by ``cls``
Close #2028
* ``assignment-from-no-return`` considers methods as well.
Close #2081
* Support typing.TYPE_CHECKING for *unused-import* errors
Close #1948
* Inferred classes at a function level no longer emit ``invalid-name``
when they don't respect the variable regular expression
Close #1049
* Added basic support for postponed evaluation of function annotations.
Close #2069
* Fix a bug with ``missing-kwoa`` and variadics parameters
Close #1111
* ``simplifiable-if-statement`` takes in account only when assigning to same targets
Close #1984
* Make ``len-as-condition`` test more cases, such as ``len() < 1`` or ``len <= 0``
* Fix false-positive ``line-too-long`` message emission for
commented line at the end of a module
Close #1950
* Fix false-positive ``bad-continuation`` for with statements
Close #461
* Don't warn about ``stop-iteration-return`` when using ``next()`` over ``itertools.count``
Close #2158
* Add a check ``consider-using-get`` for unidiomatic usage of value/default-retrieval
for a key from a dictionary
Close #2076
* invalid-slice-index is not emitted when the slice is used as index for a complex object.
We only use a handful of known objects (list, set and friends) to figure out if
we should emit invalid-slice-index when the slice is used to subscript an object.
* Don't emit ``unused-import`` anymore for typing imports used in type comments.
* Add a new check 'useless-import-alias'.
Close #2052
* Add ``comparison-with-callable`` to warn for comparison with bare callable, without calling it.
Close #2082
* Don't warn for ``missing-type-doc`` and/or ``missing-return-type-doc``, if type
annotations exist on the function signature for a parameter and/or return type.
Close #2083
* Add ``--exit-zero`` option for continuous integration scripts to more
easily call Pylint in environments that abort when a program returns a
non-zero (error) status code.
Close #2042
* Warn if the first argument of an instance/ class method gets assigned
Close #977
* New check ``comparison-with-itself`` to check comparison between same value.
Close #2051
* Add a new warning, 'logging-fstring-interpolation', emitted when f-string
is used within logging function calls.
Close #1998
* Don't show 'useless-super-delegation' if the subclass method has different type annotations.
Close #1923
* Add ``unhashable-dict-key`` check.
Closes #586
* Don't warn that a global variable is unused if it is defined by an import
Close #1453
* Skip wildcard import check for ``__init__.py``.
Close #2026
* The Python 3 porting mode can now run with Python 3 as well.
* ``too-few-public-methods`` is not emitted for dataclasses.
Close #1793
* New verbose mode option, enabled with ``--verbose`` command line flag, to
display of extra non-checker-related output. It is disabled by default.
Close #1863
* ``undefined-loop-variable`` takes in consideration non-empty iterred objects before emitting
Close #2039
* Add support for numpydoc optional return value names.
Close #2030
* ``singleton-comparison`` accounts for negative checks
Close #2037
* Add a check ``consider-using-in`` for comparisons of a variable against
multiple values with "==" and "or"s instead of checking if the variable
is contained "in" a tuple of those values.
Close #1977
* defaultdict and subclasses of dict are now handled for dict-iter-* checks
Close #2005
* ``logging-format-interpolation`` also emits when f-strings are used instead of % syntax.
Close #1788
* Don't trigger misplaced-bare-raise when the raise is in a finally clause
Close #1924
* Add a new check, ``possibly-unused-variable``.
This is similar to ``unused-variable``, the only difference is that it is
emitted when we detect a locals() call in the scope of the unused variable.
The ``locals()`` call could potentially use the said variable, by consuming
all values that are present up to the point of the call. This new check
allows to disable this error when the user intentionally uses ``locals()``
to consume everything.
Close #1909.
* ``no-else-return`` accounts for multiple cases
The check was a bit overrestrictive because we were checking for
return nodes in the .orelse node. At that point though the if statement
can be refactored to not have the orelse. This improves the detection of
other cases, for instance it now detects TryExcept nodes that are part of
the .else branch.
Close #1852
* Added two new checks, ``invalid-envvar-value`` and ``invalid-envvar-default``.
The former is trigger whenever pylint detects that environment variable manipulation
functions uses a different type than strings, while the latter is emitted whenever
the said functions are using a default variable of different type than expected.
* Add a check ``consider-using-join`` for concatenation of strings using str.join(sequence)
Close #1952
* Add a check ``consider-swap-variables`` for swapping variables with tuple unpacking
Close #1922
* Add new checker ``try-except-raise`` that warns the user if an except handler block
has a ``raise`` statement as its first operator. The warning is shown when there is
a bare raise statement, effectively re-raising the exception that was caught or the
type of the exception being raised is the same as the one being handled.
* Don't crash on invalid strings when checking for ``logging-format-interpolation``
Close #1944
* Exempt ``__doc__`` from triggering a ``redefined-builtin``
``__doc__`` can be used to specify a docstring for a module without
passing it as a first-statement string.
* Fix false positive bad-whitespace from function arguments with default
values and annotations
Close #1831
* Fix stop-iteration-return false positive when next builtin has a
default value in a generator
Close #1830
* Fix emission of false positive ``no-member`` message for class with "private" attributes whose name is mangled.
Close #1643
* Fixed a crash which occurred when ``Uninferable`` wasn't properly handled in ``stop-iteration-return``
Close #1779
* Use the proper node to get the name for redefined functions (#1792)
Close #1774
* Don't crash when encountering bare raises while checking inconsistent returns
Close #1773
* Fix a false positive ``inconsistent-return-statements`` message when if statement is inside try/except.
Close #1770
* Fix a false positive ``inconsistent-return-statements`` message when while loop are used.
Close #1772
* Correct column number for whitespace conventions.
Previously the column was stuck at 0
Close #1649
* Fix ``unused-argument`` false positives with overshadowed variable in
dictionary comprehension.
Close #1731
* Fix false positive ``inconsistent-return-statements`` message when never
returning functions are used (i.e sys.exit for example).
Close #1771
* Fix error when checking if function is exception, as in ``bad-exception-context``.
* Fix false positive ``inconsistent-return-statements`` message when a
function is defined under an if statement.
Close #1794
* New ``useless-return`` message when function or method ends with a "return" or
"return None" statement and this is the only return statement in the body.
* Fix false positive ``inconsistent-return-statements`` message by
avoiding useless exception inference if the exception is not handled.
Close #1794 (second part)
* Fix bad thread instantiation check when target function is provided in args.
Close #1840
* Fixed false positive when a numpy Attributes section follows a Parameters
section
Close #1867
* Fix incorrect file path when file absolute path contains multiple ``path_strip_prefix`` strings.
Close #1120
* Fix false positive undefined-variable for lambda argument in class definitions
Close #1824
* Add of a new checker that warns the user if some messages are enabled or disabled
by id instead of symbol.
Close #1599
* Suppress false-positive ``not-callable`` messages from certain
staticmethod descriptors
Close #1699
* Fix indentation handling with tabs
Close #1148
* Fix false-positive ``bad-continuation`` error
Close #638
* Fix false positive unused-variable in lambda default arguments
Close #1921
Close #1552
Close #1099
Close #210
* Updated the default report format to include paths that can be clicked on in some terminals (e.g. iTerm).
* Fix inline def behavior with ``too-many-statements`` checker
Close #1978
* Fix ``KeyError`` raised when using docparams and NotImplementedError is documented.
Close #2102
* Fix 'method-hidden' raised when assigning to a property or data descriptor.
* Fix emitting ``useless-super-delegation`` when changing the default value of keyword arguments.
Close #2022
* Expand ignored-argument-names include starred arguments and keyword arguments
Close #2214
* Fix false-positive undefined-variable in nested lambda
Close #760
* Fix false-positive ``bad-whitespace`` message for typing annoatations
with ellipses in them
Close 1992
* Broke down "missing-docstrings" between "module", "class" and "function"
For this to work we had to make multiple messages with the same old name
possible.
Closes #1164
What's New in Pylint 1.9?
=========================
Release date: 2018-05-15
* Added two new Python 3 porting checks, ``exception-escape`` and ``comprehension-escape``
These two are emitted whenever pylint detects that a variable defined in the
said blocks is used outside of the given block. On Python 3 these values are deleted.
* Added a new ``deprecated-sys-function``, emitted when accessing removed sys members.
* Added ``xreadlines-attribute``, emitted when the ``xreadlines()`` attribute is accessed.
* The Python 3 porting mode can now run with Python 3 as well.
* docparams extension allows abstract methods to document what overriding
implementations should return, and to raise NotImplementedError without
documenting it.
Closes #2044
* Special methods do not count towards ``too-few-methods``,
and are considered part of the public API.
* Enum classes do not trigger ``too-few-methods``
Close #605
* Added a new Python 2/3 check for accessing ``operator.div``, which is removed in Python 3
Close #1936
* Added a new Python 2/3 check for accessing removed urllib functions
Close #1997
What's New in Pylint 1.8.1?
===========================
Release date: 2017-12-15
* Wrong version number in __pkginfo__.
What's New in Pylint 1.8?
=========================
Release date: 2017-12-15
* Respect disable=... in config file when running with --py3k.
* New warning ``shallow-copy-environ`` added
Shallow copy of os.environ doesn't work as people may expect. os.environ
is not a dict object but rather a proxy object, so any changes made
on copy may have unexpected effects on os.environ
Instead of copy.copy(os.environ) method os.environ.copy() should be
used.
See https://bugs.python.org/issue15373 for details.
Close #1301
* Do not display no-absolute-import warning multiple times per file.
* ``trailing-comma-tuple`` refactor check now extends to assignment with
more than one element (such as lists)
Close #1713
* Fixing u'' string in superfluous-parens message
Close #1420
* ``abstract-class-instantiated`` is now emitted for all inference paths.
Close #1673
* Add set of predefined naming style to ease configuration of checking
naming conventions.
Closes #1013
* Added a new check, ``keyword-arg-before-vararg``
This is emitted for function definitions
in which keyword arguments are placed before variable
positional arguments (\*args).
This may lead to args list getting modified if keyword argument's value
is not provided in the function call assuming it will take default value
provided in the definition.
* The ``invalid-name`` check contains the name of the template that caused the failure
Close #1176
* Using the -j flag won't start more child linters than needed.
Contributed by Roman Ivanov in #1614
* Fix a false positive with bad-python3-import on relative imports
Close #1608
* Added a new Python 3 check, ``non-ascii-bytes-literals``
Close #1545
* Added a couple of new Python 3 checks for accessing dict methods in non-iterable context
* Protocol checks (not-a-mapping, not-an-iterable and co.) aren't emitted on classes with dynamic getattr
* Added a new warning, 'bad-thread-instantiation'
This message is emitted when the threading.Thread class does not
receive the target argument, but receives just one argument, which
is by default the group parameter.
Close #1327
* In non-quiet mode, absolute path of used config file is logged to
standard error.
Close #1519
* Raise meaningful exception for invalid reporter class being selected
When unknown reporter class will be selected as Pylint reporter,
meaningful error message would be raised instead of bare ``ImportError``
or ``AttribueError`` related to module or reporter class being not found.
Close #1388
* Added a new Python 3 check for accessing removed functions from itertools
like ``izip`` or ``ifilterfalse``
* Added a new Python 3 check for accessing removed fields from the types
module like ``UnicodeType`` or ``XRangeType``
* Added a new Python 3 check for declaring a method ``next`` that would have
been treated as an iterator in Python 2 but a normal function in Python 3.
* Added a new key-value pair in json output. The key is ``message-id``
and the value is the message id.
Close #1512
* Added a new Python 3.0 check for raising a StopIteration inside a generator.
The check about raising a StopIteration inside a generator is also valid if the exception
raised inherit from StopIteration.
Close #1385
* Added a new warning, ``raising-format-tuple``, to detect multi-argument
exception construction instead of message string formatting.
* Added a new check for method of logging module that concatenate string via + operator
Close #1479
* Added parameter for limiting number of suggestions in spellchecking checkers
* Fix a corner-case in ``consider-using-ternary`` checker.
When object ``A`` used in ``X and A or B`` was falsy in boolean context,
Pylint incorrectly emitted non-equivalent ternary-based suggestion.
After a change message is correctly not emitted for this case.
Close #1559
* Added ``suggestion-mode`` configuration flag. When flag is enabled, informational
message is emitted instead of cryptic error message for attributes accessed on
c-extensions.
Close #1466
* Fix a false positive ``useless-super-delegation`` message when
parameters default values are different from those used in the base class.
Close #1085
* Disabling 'wrong-import-order', 'wrong-import-position', or
'ungrouped-imports' for a single line now prevents that line from
triggering violations on subsequent lines.
Close #1336
* Added a new Python check for inconsistent return statements inside method or function.
Close #1267
* Fix ``superfluous-parens`` false positive related to handling logical statements
involving ``in`` operator.
Close #574
* ``function-redefined`` message is no longer emitted for functions and
methods which names matches dummy variable name regular expression.
Close #1369
* Fix ``missing-param-doc`` and ``missing-type-doc`` false positives when
mixing ``Args`` and ``Keyword Args`` in Google docstring.
Close #1409
* Fix ``missing-docstring`` false negatives when modules, classes, or methods
consist of compound statements that exceed the ``docstring-min-length``
* Fix ``useless-else-on-loop`` false positives when break statements are
deeply nested inside loop.
Close #1661
* Fix no ``wrong-import-order`` message emitted on ordering of first and third party
libraries. With this fix, pylint distinguishes third and first party
modules when checking import order.
Close #1702
* Fix ``pylint disable=fixme`` directives ignored for comments following the
last statement in a file.
Close #1681
* Fix ``line-too-long`` message deactivated by wrong disable directive.
The directive ``disable=fixme`` doesn't deactivate anymore the emission
of ``line-too-long`` message for long commented lines.
Close #1741
* If the rcfile specified on the command line doesn't exist, then an
IOError exception is raised.
Close #1747
* Fix the wrong scope of the ``disable=`` directive after a commented line.
For example when a ``disable=line-too-long`` directive is at the end of
a long commented line, it no longer disables the emission of ``line-too-long``
message for lines that follow.
Close #1742
What's New in Pylint 1.7.1?
===========================
Release date: 2017-04-17
* Fix a false positive which occurred when an exception was reraised
Close #1419
* Fix a false positive of ``disallow-trailing-tuple``
The check was improved by verifying for non-terminating newlines, which
should exempt function calls and function definitions from the check
Close #1424
What's New in Pylint 1.7?
=========================
Release date: 2017-04-13
* Don't emit missing-final-newline or trailing-whitespace for formfeeds (page breaks).
Close #1218 and #1219
* Don't emit by default no-member if we have opaque inference objects in the inference results
This is controlled through the new flag ignore-on-opaque-inference, which is by
default True. The inference can return multiple potential results while
evaluating a Python object, but some branches might not be evaluated, which
results in partial inference. In that case, it might be useful to still emit
no-member and other checks for the rest of the inferred objects.
* Added new message ``assign-to-new-keyword`` to warn about assigning to names which
will become a keyword in future Python releases.
Close #1351
* Split the 'missing or differing' in parameter documentation in different error.
'differing-param-doc' covers the differing part of the old 'missing-param-doc',
and 'differing-type-doc' covers the differing part of the old 'missing-type-doc'
Close #1342
* Added a new error, 'used-prior-global-declaration', which is emitted when a name
is used prior a global declaration in a function. This causes a SyntaxError in
Python 3.6
Close #1257
* The protocol checks are emitting their messages when a special method is set to None.
Close #1263
* Properly detect if imported name is assigned to same name in different
scope.
Close #636, #848, #851, and #900
* Require one space for annotations with type hints, as per PEP 8.
* 'trailing-comma-tuple' check was added
This message is emitted when pylint finds an one-element tuple,
created by a stray comma. This can suggest a potential problem in the
code and it is recommended to use parantheses in order to emphasise the
creation of a tuple, rather than relying on the comma itself.
* Don't emit not-callable for instances with unknown bases.
Close #1213
* Treat keyword only arguments the same as positional arguments with regard to unused-argument check
* Don't try to access variables defined in a separate scope when checking for ``protected-access``
* Added new check to detect incorrect usage of len(SEQUENCE) inside
test conditions.
* Added new extension to detect comparisons against empty string constants
* Added new extension to detect comparisons of integers against zero
* Added new error conditions for 'bad-super-call'
Now detects ``super(type(self), self)`` and ``super(self.__class__, self)``
which can lead to recursion loop in derived classes.
* PyLinter.should_analyze_file has a new optional parameter, called ``is_argument``
Close #1079
* Add attribute hints for missing members
Closes #1035
* Add a new warning, 'redefined-argument-from-local'
Closes #649
* Support inline comments for comma separated values in the config file
Closes #1024
* epylint.py_run's *script* parameter was removed.
* epylint.py_run now uses ``shell=False`` for running the underlying process.
Closes #441
* Added a new warning, 'useless-super-delegation'
Close 839.
* Added a new error, 'invalid-metaclass', raised when
we can detect that a class is using an improper metaclass.
Close #579
* Added a new refactoring message, 'literal-comparison'.
Close #786
* arguments-differ takes in consideration kwonlyargs and variadics
Close #983
* Removed --optimized-ast. Part of #975.
* Removed --files-output option. Part of #975.
* Removed pylint-gui from the package.
* Removed the HTML reporter. Part of #975.
* ignored-argument-names is now used for ignoring arguments for unused-variable check.
This option was used for ignoring arguments when computing the correct number of arguments
a function should have, but for handling the arguments with regard
to unused-variable check, dummy-variables-rgx was used instead. Now, ignored-argument-names
is used for its original purpose and also for ignoring the matched arguments for
the unused-variable check. This offers a better control of what should be ignored
and how.
Also, the same option was moved from the design checker to the variables checker,
which means that the option now appears under the ``[VARIABLES]`` section inside
the configuration file.
Close #862.
* Fix a false positive for keyword variadics with regard to keyword only arguments.
If a keyword only argument was necessary for a function, but that function was called
with keyword variadics (\**kwargs), then we were emitting a missing-kwoa false positive,
which is now fixed.
Close #934.
* Fix some false positives with unknown sized variadics.
Close #878
* Added a new extension, check_docstring, for checking PEP 257 conventions.
Closes #868.
* config files with BOM markers can now be read.
Close #864.
* epylint.py_run does not crash on big files, using .communicate() instead of .wait()
Close #599
* Disable reports by default and show the evaluation score by default
As per discussion from issue #746, the reports were disabled by
default in order to simplify the interaction between the tool
and the users. The score is still shown by default, as a way of
closely measuring when it increases or decreases due to changes
brought to the code.
* Disable the information category messages by default.
This is a step towards making pylint more sane, as
per the discussion from issue #746.
* Catch more cases as not proper iterables for __slots__ with
regard to invalid-slots pattern. Closes issue #775.
* empty indent strings are rejected.
* Added a new error, 'relative-beyond-top-level', which is emitted
when a relative import was attempted beyond the top level package.
Closes issue #588.
* Added a new warning, 'unsupported-assignment-operation', which is
emitted when item assignment is tried on an object which doesn't
have this ability. Closes issue #591.
* Added a new warning, 'unsupported-delete-operation', which is
emitted when item deletion is tried on an object which doesn't
have this ability. Closes issue #592.
* Fix a false positive of 'redundant-returns-doc', occurred when the documented
function was using *yield* instead of *return*.
Closes issue #984.
* Fix false positives of 'missing-[raises|params|type]-doc' due to not
recognizing keyword synonyms supported by Sphinx.
* Added a new refactoring message, 'consider-merging-isinstance', which is
emitted whenever we can detect that consecutive isinstance calls can be
merged together.
Closes issue #968
* Fix a false positive of 'missing-param-doc' and 'missing-type-doc',
occurred when a class docstring uses the 'For the parameters, see'
magic string but the class __init__ docstring does not, or vice versa.
* ``redefined-outer-name`` is now also emitted when a nested loop's target
variable is the same as a target variable in an outer loop.
Closes issue #911.
* Added proper exception type inference for 'missing-raises-doc'.
* Added InvalidMessageError exception class to replace asserts in
pylint.utils.
* More thorough validation in MessagesStore.register_messages() to avoid
one message accidentally overwriting another.
* InvalidMessageError, UnknownMessage, and EmptyReport exceptions are
moved to the new pylint.exceptions submodule.
* UnknownMessage and EmptyReport are renamed to UnknownMessageError and
EmptyReportError.
* Warnings 'missing-returns-type-doc' and 'missing-yields-type-doc'
have each been split into two warnings - 'missing-[return|yield]-doc'
and 'missing-[return|yield]-type-doc'.
* Added epytext support to docparams extension.
Closes #1029.
* Support having plugins with the same name and with options defined
Closes #1018
* Sort configuration options in a section
Closes #1087
* Added a new Python 3 warning around implementing '__div__', '__idiv__', or
'__rdiv__' as those methods are phased out in Python 3.
* Added a new warning, 'overlapping-except', which is
emitted when two exceptions in the same except-clause are aliases
for each other or one exceptions is an ancestor of another.
* Avoid crashing on ill-formatted strings when checking for string formatting errors.
* Added a new Python 3 warning for calling 'str.encode' or 'str.decode' with a non-text
encoding.
* Added new coding convention message, 'single-string-used-for-slots'.
Closes #1166
* Added a new Python 3 check for accessing 'sys.maxint' which was removed in Python 3 in favor
of 'sys.maxsize'
* Added a new Python 3 check for bad imports.
* Added a new Python 3 check for accessing deprecated string functions.
* Do not warn about unused arguments or function being redefined in singledispatch
registered implementations.
Closes #1032 and #1034
* Added refactoring message 'no-else-return'.
* Improve unused-variable checker to warn about unused variables in module scope.
Closes #919
* Ignore modules import as _ when checking for unused imports.
Closes #1190
* Improve handing of Python 3 classes with metaclasses declared in nested scopes.
Closes #1177
* Added refactoring message 'consider-using-ternary'.
Closes #1204
* Bug-fix for false-positive logging-format-interpolation` when format specifications
are used in formatted string.
Fixes #572
* Added a new switch ``single-line-class-stmt`` to allow single-line declaration
of empty class bodies.
Closes #738
* Protected access in form ``type(self)._attribute`` are now allowed.
Fixes #1031
* Let the user modify msg-template when Pylint is called from a Python script
Fixes #1269
* Imports checker supports new switch ``allow-wildcard-with-all`` which disables
warning on wildcard import when imported module defines ``__all__`` variable.
Fixes #831
* ``too-many-format-args`` and ``too-few-format-args`` are emitted correctly when
starred expression are used in RHS tuple.
Fixes #957
* ``cyclic-import`` checker supports local disable clauses. When one
of cycle imports was done in scope where disable clause was active,
cycle is not reported as violation.
Fixes #59
What's new in Pylint 1.6.3?
===========================
Release date: 2016-07-18
* Do not crash when inferring uninferable exception types for docparams extension
Close #998
What's new in Pylint 1.6.2?
===========================
Release date: 2016-07-15
* Do not crash when printing the help of options with default regular expressions
Close #990
* More granular versions for deprecated modules.
Close #991
What's new in Pylint 1.6.1?
===========================
Release date: 2016-07-07
* Use environment markers for supporting conditional dependencies.
What's New in Pylint 1.6.0?
===========================
Release date: 2016-07-03
* Added a new extension, ``pylint.extensions.mccabe``, for warning
about complexity in code.
* Deprecate support for --optimize-ast. Part of #975.
* Deprecate support for the HTML output. Part of #975.
* Deprecate support for --output-files. Part of #975.
* Fixed a documentation error for the check_docs extension. Fixes #735.
* Made the list of property-defining decorators configurable.
* Fix a bug where the top name of a qualified import was detected as unused variable.
Close #923.
* bad-builtin is now an extension check.
* generated-members support qualified name through regular expressions.
For instance, one can specify a regular expression as --generated-members=astroid.node_classes.*
for ignoring every no-member error that is accessed as in ``astroid.node_classes.missing.object``.
* Add the ability to ignore files based on regex matching, with the new ``--ignore-patterns``
option.
This addresses issue #156 by allowing for multiple ignore patterns
to be specified. Rather than clobber the existing ignore option, we
introduced a new one called ignore-patterns.
* Added a new error, 'trailing-newlines', which is emitted when a file
has trailing new lines.
Closes issue #682.
* Add a new option, 'redefining-builtins-modules', for controlling the modules
which can redefine builtins, such as six.moves and future.builtins.
Close #464.
* 'reimported' is emitted when the same name is imported from different module.
Close #162.
* Add a new recommendation checker, 'consider-iterating-dictionary', which is emitted
which is emitted when a dictionary is iterated through .keys().
Close #699
* Use the configparser backport for Python 2
This fixes a problem we were having with comments inside values, which is fixed
in Python 3's configparser.
Close #828
* A new error was added, 'invalid-length-returned', when the ``__len__``
special method returned something else than a non-negative number.
Close issue #557
* Switch to using isort internally for wrong-import-order.
Closes #879.
* check_docs extension can find constructor parameters in __init__.
Closes #887.
* Don't warn about invalid-sequence-index if the indexed object has unknown base
classes.
Closes #867
* Don't crash when checking, for super-init-not-called, a method defined in an if block.
* Do not emit import-error or no-name-in-module for fallback import blocks by default.
Until now, we warned with these errors when a fallback import block (a TryExcept block
that contained imports for Python 2 and 3) was found, but this gets cumbersome when
trying to write compatible code. As such, we don't check these blocks by default,
but the analysis can be enforced by using the new ``--analyse-fallback-block`` flag.
Close #769.
What's New in Pylint 1.5.5?
===========================
Release date: 2016-03-21
* Let visit_importfrom from Python 3 porting checker be called when everything is disabled
Because the visit method was filtering the patterns it was expecting to be activated,
it didn't run when everything but one pattern was disabled, leading to spurious false
positives
Close #852
* Don't emit unsubscriptable-value for classes with unknown
base classes.
Close #776.
* Use an OrderedDict for storing the configuration elements
This fixes an issue related to impredictible order of the disable / enable
elements from a config file. In certain cases, the disable was coming before
the enable which resulted in classes of errors to be enabled, even though the intention
was to disable them. The best example for this was in the context of running multiple
processes, each one of it having different enables / disables that affected the output.
Close #815
* Don't consider bare and broad except handlers as ignoring NameError,
AttributeError and similar exceptions, in the context of checkers for
these issues.
Closes issue #826
What's New in Pylint 1.5.4?
===========================
Release date: 2016-01-15
* Merge StringMethodChecker with StringFormatChecker. This fixes a
bug where disabling all the messages and enabling only a handful of
messages from the StringFormatChecker would have resulted in no
messages at all.
* Don't apply unneeded-not over sets.
What's New in Pylint 1.5.3?
===========================
Release date: 2016-01-11
* Handle the import fallback idiom with regard to wrong-import-order.
Closes issue #750.
* Decouple the displaying of reports from the displaying of messages
Some reporters are aggregating the messages instead of displaying
them when they are available. The actual displaying was conflatted
in the generate_reports. Unfortunately this behaviour was flaky
and in the case of the JSON reporter, the messages weren't shown
at all if a file had syntax errors or if it was missing.
In order to fix this, the aggregated messages can now be
displayed with Reporter.display_message, while the reports are
displayed with display_reports.
Closes issues #766 and #765.
* Ignore function calls with variadic arguments without a context.
Inferring variadic positional arguments and keyword arguments
will result into empty Tuples and Dicts, which can lead in
some cases to false positives with regard to no-value-for-parameter.
In order to avoid this, until we'll have support for call context
propagation, we're ignoring such cases if detected.
Closes issue #722.
* Treat AsyncFunctionDef just like FunctionDef nodes,
by implementing visit_asyncfunctiondef in terms of
visit_functiondef.
Closes issue #767.
* Take in account kwonlyargs when verifying that arguments
are defined with the check_docs extension.
Closes issue #745.
* Suppress reporting 'unneeded-not' inside ``__ne__`` methods
Closes issue #749.
What's New in Pylint 1.5.2?
===========================
Release date: 2015-12-21
* Don't crash if graphviz is not installed, instead emit a
warning letting the user to know.
Closes issue #168.
* Accept only functions and methods for the deprecated-method checker.
This prevents a crash which can occur when an object doesn't have
.qname() method after the inference.
* Don't emit super-on-old-class on classes with unknown bases.
Closes issue #721.
* Allow statements in ``if`` or ``try`` blocks containing imports.
Closes issue #714.
What's New in Pylint 1.5.1?
===========================
Release date: 2015-12-02
* Fix a crash which occurred when old visit methods are encountered
in plugin modules. Closes issue #711.
* Add wrong-import-position to check_messages's decorator arguments
for ImportChecker.leave_module
This fixes an esoteric bug which occurs when ungrouped-imports and
wrong-import-order are disabled and pylint is executed on multiple files.
What happens is that without wrong-import-position in check_messages,
leave_module will never be called, which means that the first non-import node
from other files might leak into the current file,
leading to wrong-import-position being emitted by pylint.
* Fix a crash which occurred when old visit methods are encountered
in plugin modules. Closes issue #711.
* Don't emit import-self and cyclic-import for relative imports
of modules with the same name as the package itself.
Closes issues #708 and #706.
What's New in Pylint 1.5.0?
===========================
Release date: 2015-11-29
* Added multiple warnings related to imports. 'wrong-import-order'
is emitted when PEP 8 recommendations regarding imports are not
respected (that is, standard imports should be followed by third-party
imports and then by local imports). 'ungrouped-imports' is emitted
when imports from the same package or module are not placed
together, but scattered around in the code. 'wrong-import-position'
is emitted when code is mixed with imports, being recommended for the
latter to be at the top of the file, in order to figure out easier by
a human reader what dependencies a module has.
Closes issue #692.
* Added a new refactoring warning, 'unneeded-not', emitted
when an expression with the not operator could be simplified.
Closes issue #670.
* Added a new refactoring warning, 'simplifiable-if-statement',
used when an if statement could be reduced to a boolean evaluation
of its test. Closes issue #698.
* Added a new refactoring warning, 'too-many-boolean-expressions',
used when an if statement contains too many boolean expressions,
which makes the code less maintainable and harder to understand.
Closes issue #677.
* Property methods are shown as attributes instead of functions in
pyreverse class diagrams. Closes Issue #284
* Add a new refactoring error, 'too-many-nested-blocks', which is emitted
when a function or a method has too many nested blocks, which makes the
code less readable and harder to understand. Closes issue #668.
* Add a new error, 'unsubscriptable-object', that is emitted when
value used in subscription expression doesn't support subscription
(i.e. doesn't define __getitem__ method).
* Don't warn about abstract classes instantiated in their own
body. Closes issue #627.
* Obsolete options are not present by default in the generated
configuration file. Closes issue #632.
* non-iterator-returned can detect classes with iterator-metaclasses.
Closes issue #679.
* Add a new error, 'unsupported-membership-test', emitted when value
to the right of the 'in' operator doesn't support membership test
protocol (i.e. doesn't define __contains__/__iter__/__getitem__)
* Add new errors, 'not-an-iterable', emitted when non-iterable value
is used in an iterating context (starargs, for-statement,
comprehensions, etc), and 'not-a-mapping', emitted when non-mapping
value is used in a mapping context. Closes issue #563.
* Make 'no-self-use' checker not emit a warning if there is a 'super()'
call inside the method.
Closes issue #667.
* Add checker to identify multiple imports on one line.
Closes issue #598.
* Fix unused-argument false positive when the "+=" operator is used.
Closes issue #518.
* Don't emit import-error for ignored modules. PyLint will not emit import
errors for any import which is, or is a subpackage of, a module in
the ignored-modules list. Closes issue #223.
* Fix unused-import false positive when the import is used in a
class assignment. Closes issue #475
* Add a new error, 'not-context-manager', emitted when something
that doesn't implement __enter__ and __exit__ is used in a with
statement.
* Add a new warning, 'confusing-with-statement', emitted by the
base checker, when an ambiguous looking with statement is used.
For example `with open() as first, second` which looks like a
tuple assignment but is actually 2 context managers.
* Add a new warning, 'duplicate-except', emitted when there is an
exception handler which handles an exception type that was handled
before. Closes issue #485.
* A couple of warnings got promoted to errors, since they could uncover
potential bugs in the code. These warnings are: assignment-from-none,
unbalanced-tuple-unpacking, unpacking-non-sequence, non-iterator-returned.
Closes issue #388.
* Allow ending a pragma control with a semicolon. In this way, users
can continue a pragma control with a reason for why it is used,
as in `# pylint: disable=old-style-class;reason=...`.
Closes issue #449.
* --jobs can be used with --load-plugins now. Closes issue #456.
* Improve the performance of --jobs when dealing only with a package
name. Closes issue #479.
* Don't emit an unused-wildcard-import when the imported name comes
from another module and it is in fact a __future__ name.
* The colorized reporter now works on Windows. Closes issue #96.
* Remove pointless-except warning. It was previously disabled by
default and it wasn't very useful. Closes issue #506.
* Fix a crash on Python 3 related to the string checker, which
crashed when it encountered a bytes string with a .format
method called.
* Don't warn about no-self-use for builtin properties.
* Fix a false positive for bad-reversed-sequence, when a subclass
of a ``dict`` provides a __reversed__ method.
* Change the default no-docstring-rgx so missing-docstring isn't
emitted for private functions.
* Don't emit redefined-outer-name for __future__ directives.
Closes issue #520.
* Provide some hints for the bad-builtin message. Closes issue #522.
* When checking for invalid arguments to a callable, in typecheck.py,
look up for the __init__ in case the found __new__ comes from builtins.
Since the __new__ comes from builtins, it will not have attached any
information regarding what parameters it expects, so the check
will be useless. Retrieving __init__ in that case will at least
detect a couple of false negatives. Closes issue #429.
* Don't emit no-member for classes with unknown bases.
Since we don't know what those bases might add, we simply ignore
the error in this case.
* Lookup in the implicit metaclass when checking for no-member,
if the class in question has an implicit metaclass, which is
True for new style classes. Closes issue #438.
* Add two new warnings, duplicate-bases and inconsistent-mro.
duplicate-bases is emitted when a class has the same bases
listed more than once in its bases definition, while inconsistent-mro
is emitted when no sane mro hierarchy can be determined. Closes issue #526.
* Remove interface-not-implemented warning. Closes issue #532.
* Remove the rest of interface checks: interface-is-not-class,
missing-interface-method, unresolved-interface. The reason is that
its better to start recommending ABCs instead of the old Zope era
of interfaces. One side effect of this change is that ignore-iface-methods
becomes a noop, it's deprecated and it will be removed at some time.
* Emit a proper deprecation warning for reporters.BaseReporter.add_message.
The alternative way is to use handle_message. add_message will be removed in
Pylint 1.6.
* Added new module 'extensions' for optional checkers with the test
directory 'test/extensions' and documentation file 'doc/extensions.rst'.
* Added new checker 'extensions.check_docs' that verifies parameter
documention in Sphinx, Google, and Numpy style.
* Detect undefined variable cases, where the "definition" of an undefined
variable was in del statement. Instead of emitting used-before-assignment,
which is totally misleading, it now emits undefined-variable.
Closes issue #528.
* Don't emit attribute-defined-outside-init and access-member-before-definition
for mixin classes. Actual errors can occur in mixin classes, but this is
controlled by the ignore-mixin-members option. Closes issue #412.
* Improve the detection of undefined variables and variables used before
assignment for variables used as default arguments to function,
where the variable was first defined in the class scope.
Closes issue #342 and issue #404.
* Add a new warning, 'unexpected-special-method-signature', which is emitted
when a special method (dunder method) doesn't have the expected signature,
which can lead to actual errors in the application code.
Closes issue #253.
* Remove 'bad-context-manager' due to the inclusion of 'unexpected-special-method-signature'.
* Don't emit no-name-in-module if the import is guarded by an ImportError, Exception or
a bare except clause.
* Don't emit no-member if the attribute access node is protected by an
except handler, which handles AttributeError, Exception or it is a
bare except.
* Don't emit import-error if the import is guarded by an ImportError, Exception or a
bare except clause.
* Don't emit undefined-variable if the node is guarded by a NameError, Exception
or bare except clause.
* Add a new warning, 'using-constant-test', which is emitted when a conditional
statement (If, IfExp) uses a test which is always constant, such as numbers,
classes, functions etc. This is most likely an error from the user's part.
Closes issue #524.
* Don't emit 'raising-non-exception' when the exception has unknown
bases. We don't know what those bases actually are and it's better
to assume that the user knows what he is doing rather than emitting
a message which can be considered a false positive.
* Look for a .pylintrc configuration file in the current folder,
if pylintrc is not found. Dotted pylintrc files will not be searched
in the parents of the current folder, as it is done for pylintrc.
* Add a new error, 'invalid-unary-type-operand', emitted when
an unary operand is used on something which doesn't support that
operation (for instance, using the unary bitwise inversion operator
on an instance which doesn't implement __invert__).
* Take in consideration differences between arguments of various
type of functions (classmethods, staticmethods, properties)
when checking for ``arguments-differ``. Closes issue #548.
* astroid.inspector was moved to pylint.pyreverse, since it belongs
there and it doesn't need to be in astroid.
* astroid.utils.LocalsVisitor was moved to pylint.pyreverse.LocalsVisitor.
* pylint.checkers.utils.excepts_import_error was removed.
Use pylint.chekcers.utils.error_of_type instead.
* Don't emit undefined-all-variables for nodes which can't be
inferred (YES nodes).
* yield-outside-func is also emitted for ``yield from``.
* Add a new error, 'too-many-star-expressions', emitted when
there are more than one starred expression (`*x`) in an assignment.
The warning is emitted only on Python 3.
* Add a new error, 'invalid-star-assignment-target', emitted when
a starred expression (`*x`) is used as the lhs side of an assignment,
as in `*x = [1, 2]`. This is not a SyntaxError on Python 3 though.
* Detect a couple of objects which can't be base classes (bool,
slice, range and memoryview, which weren't detected until now).
* Add a new error for the Python 3 porting checker, ``import-star-module-level``,
which is used when a star import is detected in another scope than the
module level, which is an error on Python 3. Using this will emit a
SyntaxWarning on Python 2.
* Add a new error, 'star-needs-assignment-target', emitted on Python 3 when
a Starred expression (`*x`) is not used in an assignment target. This is not
caught when parsing the AST on Python 3, so it needs to be a separate check.
* Add a new error, 'unsupported-binary-operation', emitted when
two a binary arithmetic operation is executed between two objects
which don't support it (a number plus a string for instance).
This is currently disabled, since the it exhibits way too many false
positives, but it will be reenabled as soon as possible.
* New imported features from astroid into pyreverse: pyreverse.inspector.Project,
pyreverse.inspector.project_from_files and pyreverse.inspector.interfaces.
These were moved since they didn't belong in astroid.
* Enable misplaced-future for Python 3. Closes issue #580.
* Add a new error, 'nonlocal-and-global', which is emitted when a
name is found to be both nonlocal and global in the same scope.
Closes issue #581.
* ignored-classes option can work with qualified names (ignored-classes=optparse.Values)
Closes issue #297.
* ignored-modules can work with qualified names as well as with Unix pattern
matching for recursive ignoring. Closes issues #244.
* Improve detection of relative imports in non-packages, as well as importing
missing modules with a relative import from a package.
* Don't emit no-init if not all the bases from a class are known.
Closes issue #604.
* --no-space-check option accepts ``empty-line`` as a possible option.
Closes issue #541.
* --generate-rcfile generates by default human readable symbols
for the --disable option. Closes issue #608.
* Improved the not-in-loop checker to properly detect more cases.
* Add a new error, 'continue-in-finally', which is emitted when
the ``continue`` keyword is found inside a ``finally`` clause, which
is a SyntaxError.
* The --zope flag is deprecated and it is slated for removal
in Pylint 1.6.
The reason behind this removal is the fact that it's a specialized
flag and there are solutions for the original problem:
use --generated-members with the members that causes problems
when using Zope or add AST transforms tailored to the zope
project.
At the same time, --include-ids and --symbols will also be removed
in Pylint 1.6. Closes issue #570.
* missing-module-attribute was removed and the corresponding
CLI option, required-attributes, which is slated for removal
in Pylint 1.6.
* missing-reversed-argument was removed.
The reason behind this is that this kind of errors should be
detected by the type checker for *all* the builtins and not
as a special case for the reversed builtin. This will happen
shortly in the future.
* --comment flag is obsolete and it will be removed in Pylint 1.6.
* --profile flag is obsolete and it will be removed in Pylint 1.6.
* Add a new error, 'misplaced-bare-raise'.
The error is used when a bare raise is not used inside an except clause.
This can generate a RuntimeError in Python, if there are no active exceptions
to be reraised. While it works in Python 2 due to the fact that the exception
leaks outside of the except block, it's nevertheless a behaviour that
a user shouldn't depend upon, since it's not obvious to the reader of the code
what exception will be raised and it will not be compatible with Python 3 anyhow.
Closes issue #633.
* Bring logilab-common's ureports into pylint.reporters.
With this change, we moved away from depending on logilab-common,
having in Pylint all the components that were used from logilab-common.
The API should be considered an implementation detail and can change at
some point in the future.
Closes issue #621.
* ``reimported`` is emitted for reimported objects on the same line.
Closes issue #639.
* Abbreviations of command line options are not supported anymore.
Using abbreviations for CLI options was never considered to be
a feature of pylint, this fact being only a side effect of using optparse.
As this was the case, using --load-plugin or other abbreviation
for --load-plugins never actually worked, while it also didn't raise
an error. Closes issue #424.
* Add a new error, 'nonlocal-without-binding'
The error is emitted on Python 3 when a nonlocal name is not bound
to any variable in the parents scopes. Closes issue #582.
* 'deprecated-module' can be shown for modules which aren't
available. Closes issue #362.
* Don't consider a class abstract if its members can't
be properly inferred.
This fixes a false positive related to abstract-class-instantiated.
Closes issue #648.
* Add a new checker for the async features added by PEP 492.
* Add a new error, 'yield-inside-async-function', emitted on
Python 3.5 and upwards when the ``yield`` statement is found inside
a new coroutine function (PEP 492).
* Add a new error, 'not-async-context-manager', emitted when
an async context manager block is used with an object which doesn't
support this protocol (PEP 492).
* Add a new convention warning, 'singleton-comparison', emitted when
comparison to True, False or None is found.
* Don't emit 'assigning-non-slot' for descriptors. Closes issue #652.
* Add a new error, 'repeated-keyword', when a keyword argument is passed
multiple times into a function call.
This is similar with redundant-keyword-arg, but it's mildly different
that it needs to be a separate error.
* --enable=all can now be used. Closes issue #142.
* Add a new convention message, 'misplaced-comparison-constant',
emitted when a constant is placed in the left hand side of a comparison,
as in '5 == func()'. This is also called Yoda condition, since the
flow of code reminds of the Star Wars green character, conditions usually
encountered in languages with variabile assignments in conditional
statements.
* Add a new convention message, 'consider-using-enumerate', which is
emitted when code that uses ``range`` and ``len`` for iterating is encountered.
Closes issue #684.
* Added two new refactoring messages, 'no-classmethod-decorator' and
'no-staticmethod-decorator', which are emitted when a static method or a class
method is declared without using decorators syntax.
Closes issue #675.
What's New in Pylint 1.4.3?
===========================
Release date: 2015-03-14
* Remove three warnings: star-args, abstract-class-little-used,
abstract-class-not-used. These warnings don't add any real value
and they don't imply errors or problems in the code.
* Added a new option for controlling the peephole optimizer in astroid.
The option ``--optimize-ast`` will control the peephole optimizer,
which is used to optimize a couple of AST subtrees. The current problem
solved by the peephole optimizer is when multiple joined strings,
with the addition operator, are encountered. If the numbers of such
strings is high enough, Pylint will then fail with a maximum recursion
depth exceeded error, due to its visitor architecture. The peephole
just transforms such calls, if it can, into the final resulting string
and this exhibit a problem, because the visit_binop method stops being
called (in the optimized AST it will be a Const node).
What's New in Pylint 1.4.2?
===========================
Release date: 2015-03-11
* Don't require a docstring for empty modules. Closes issue #261.
* Fix a false positive with ``too-few-format-args`` string warning,
emitted when the string format contained a normal positional
argument ('{0}'), mixed with a positional argument which did
an attribute access ('{0.__class__}').
Closes issue #463.
* Take in account all the methods from the ancestors
when checking for too-few-public-methods. Closes issue #471.
* Catch enchant errors and emit 'invalid-characters-in-docstring'
when checking for spelling errors. Closes issue #469.
* Use all the inferred statements for the super-init-not-called
check. Closes issue #389.
* Add a new warning, 'unichr-builtin', emitted by the Python 3
porting checker, when the unichr builtin is found. Closes issue #472.
* Add a new warning, 'intern-builtin', emitted by the Python 3
porting checker, when the intern builtin is found. Closes issue #473.
* Add support for editable installations.
* The HTML output accepts the ``--msg-template`` option. Patch by
Dan Goldsmith.
* Add 'map-builtin-not-iterating' (replacing 'implicit-map-evaluation'),
'zip-builtin-not-iterating', 'range-builtin-not-iterating', and
'filter-builtin-not-iterating' which are emitted by ``--py3k`` when the
appropriate built-in is not used in an iterating context (semantics
taken from 2to3).
* Add a new warning, 'unidiomatic-typecheck', emitted when an explicit
typecheck uses type() instead of isinstance(). For example,
`type(x) == Y` instead of `isinstance(x, Y)`. Patch by Chris Rebert.
Closes issue #299.
* Add support for combining the Python 3 checker mode with the --jobs
flag (--py3k and --jobs). Closes issue #467.
* Add a new warning for the Python 3 porting checker, 'using-cmp-argument',
emitted when the ``cmp`` argument for the ``list.sort`` or ``sorted builtin``
is encountered.
* Make the --py3k flag commutative with the -E flag. Also, this patch
fixes the leaks of error messages from the Python 3 checker when
the errors mode was activated. Closes issue #437.
What's New in Pylint 1.4.1?
===========================
Release date: 2015-01-16
* Look only in the current function's scope for bad-super-call.
Closes issue #403.
* Check the return of properties when checking for not-callable.
Closes issue #406.
* Warn about using the input() or round() built-ins for Python 3.
Closes issue #411.
* Proper abstract method lookup while checking for
abstract-class-instantiated. Closes issue #401.
* Use a mro traversal for finding abstract methods. Closes issue #415.
* Fix a false positive with catching-non-exception and tuples of
exceptions.
* Fix a false negative with raising-non-exception, when the raise used
an uninferrable exception context.
* Fix a false positive on Python 2 for raising-bad-type, when
raising tuples in the form 'raise (ZeroDivisionError, None)'.
* Fix a false positive with invalid-slots-objects, where the slot entry
was a unicode string on Python 2. Closes issue #421.
* Add a new warning, 'redundant-unittest-assert', emitted when using
unittest's methods assertTrue and assertFalse with constant value
as argument. Patch by Vlad Temian.
* Add a new JSON reporter, usable through -f flag.
* Add the method names for the 'signature-differs' and 'argument-differs'
warnings. Closes issue #433.
* Don't compile test files when installing.
* Fix a crash which occurred when using multiple jobs and the files
given as argument didn't exist at all.
What's New in Pylint 1.4.0?
============================
Release date: 2014-11-23
* Added new options for controlling the loading of C extensions.
By default, only C extensions from the stdlib will be loaded
into the active Python interpreter for inspection, because they
can run arbitrary code on import. The option
``--extension-pkg-whitelist`` can be used to specify modules
or packages that are safe to load.
* Change default max-line-length to 100 rather than 80
* Drop BaseRawChecker class which were only there for backward
compat for a while now
* Don't try to analyze string formatting with objects coming from
function arguments. Closes issue #373.
* Port source code to be Python 2/3 compatible. This drops the
need for 2to3, but does drop support for Python 2.5.
* Each message now comes with a confidence level attached, and
can be filtered base on this level. This allows to filter out
all messages that were emitted even though an inference failure
happened during checking.
* Improved presenting unused-import message. Closes issue #293.
* Add new checker for finding spelling errors. New messages:
wrong-spelling-in-comment, wrong-spelling-in-docstring.
New options: spelling-dict, spelling-ignore-words.
* Add new '-j' option for running checks in sub-processes.
* Added new checks for line endings if they are mixed (LF vs CRLF)
or if they are not as expected. New messages: mixed-line-endings,
unexpected-line-ending-format. New option: expected-line-ending-format.
* 'dangerous-default-value' no longer evaluates the value of the arguments,
which could result in long error messages or sensitive data being leaked.
Closes issue #282
* Fix a false positive with string formatting checker, when
encountering a string which uses only position-based arguments.
Closes issue #285.
* Fix a false positive with string formatting checker, when using
keyword argument packing. Closes issue #288.
* Proper handle class level scope for lambdas.
* Handle 'too-few-format-args' or 'too-many-format-args' for format
strings with both named and positional fields. Closes issue #286.
* Analyze only strings by the string format checker. Closes issue #287.
* Properly handle nested format string fields. Closes issue #294.
* Don't emit 'attribute-defined-outside-init' if the attribute
was set by a function call in a defining method. Closes issue #192.
* Properly handle unicode format strings for Python 2.
Closes issue #296.
* Don't emit 'import-error' if an import was protected by a try-except,
which excepted ImportError.
* Fix an 'unused-import' false positive, when the error was emitted
for all the members imported with 'from import' form.
Closes issue #304.
* Don't emit 'invalid-name' when assigning a name in an
ImportError handler. Closes issue #302.
* Don't count branches from nested functions.
* Fix a false positive with 'too-few-format-args', when the format
strings contains duplicate manual position arguments.
Closes issue #310.
* fixme regex handles comments without spaces after the hash.
Closes issue #311.
* Don't emit 'unused-import' when a special object is imported
(__all__, __doc__ etc.). Closes issue #309.
* Look in the metaclass, if defined, for members not found in the current
class. Closes issue #306.
* Don't emit 'protected-access' if the attribute is accessed using
a property defined at the class level.
* Detect calls of the parent's __init__, through a binded super() call.
* Check that a class has an explicitly defined metaclass before
emitting 'old-style-class' for Python 2.
* Emit 'catching-non-exception' for non-class nodes. Closes issue #303.
* Order of reporting is consistent.
* Add a new warning, 'boolean-datetime', emitted when an instance
of 'datetime.time' is used in a boolean context. Closes issue #239.
* Fix a crash which occurred while checking for 'method-hidden',
when the parent frame was something different than a function.
* Generate html output for missing files. Closes issue #320.
* Fix a false positive with 'too-many-format-args', when the format
string contains mixed attribute access arguments and manual
fields. Closes issue #322.
* Extend the cases where 'undefined-variable' and 'used-before-assignment'
can be detected. Closes issue #291.
* Add support for customising callback identifiers, by adding a new
'--callbacks' command line option. Closes issue #326.
* Add a new warning, 'logging-format-interpolation', emitted when .format()
string interpolation is used within logging function calls.
* Don't emit 'unbalanced-tuple-unpacking' when the rhs of the assignment
is a variable length argument. Closes issue #329.
* Add a new warning, 'inherit-non-class', emitted when a class inherits
from something which is not a class. Closes issue #331.
* Fix another false positives with 'undefined-variable', where the variable
can be found as a class assignment and used in a function annotation.
Closes issue #342.
* Handle assignment of the string format method to a variable.
Closes issue #351.
* Support wheel packaging format for PyPi. Closes issue #334.
* Check that various built-ins that do not exist in Python 3 are not
used: apply, basestring, buffer, cmp, coerce, execfile, file, long
raw_input, reduce, StandardError, unicode, reload and xrange.
* Warn for magic methods which are not used in any way in Python 3:
__coerce__, __delslice__, __getslice__, __setslice__, __cmp__,
__oct__, __nonzero__ and __hex__.
* Don't emit 'assigning-non-slot' when the assignment is for a property.
Closes issue #359.
* Fix for regression: '{path}' was no longer accepted in '--msg-template'.
* Report the percentage of all messages, not just for errors and warnings.
Closes issue #319.
* 'too-many-public-methods' is reported only for methods defined in a class,
not in its ancestors. Closes issue #248.
* 'too-many-lines' disable pragma can be located on any line, not only the
first. Closes issue #321.
* Warn in Python 2 when an import statement is found without a
corresponding ``from __future__ import absolute_import``.
* Warn in Python 2 when a non-floor division operation is found without
a corresponding ``from __future__ import division``.
* Add a new option, 'exclude-protected', for excluding members
from the protected-access warning. Closes issue #48.
* Warn in Python 2 when using dict.iter*(), dict.view*(); none of these
methods are available in Python 3.
* Warn in Python 2 when calling an object's next() method; Python 3 uses
__next__() instead.
* Warn when assigning to __metaclass__ at a class scope; in Python 3 a
metaclass is specified as an argument to the 'class' statement.
* Warn when performing parameter tuple unpacking; it is not supported in
Python 3.
* 'abstract-class-instantiated' is also emitted for Python 2.
It was previously disabled.
* Add 'long-suffix' error, emitted when encountering the long suffix
on numbers.
* Add support for disabling a checker, by specifying an 'enabled'
attribute on the checker class.
* Add a new CLI option, --py3k, for enabling Python 3 porting mode. This
mode will disable all other checkers and will emit warnings and
errors for constructs which are invalid or removed in Python 3.
* Add 'old-octal-literal' to Python 3 porting checker, emitted when
encountering octals with the old syntax.
* Add 'implicit-map-evaluation' to Python 3 porting checker, emitted
when encountering the use of map builtin, without explicit evaluation.
What's New in Pylint 1.3.0?
===========================
Release date: 2014-07-26
* Allow hanging continued indentation for implicitly concatenated
strings. Closes issue #232.
* Pylint works under Python 2.5 again, and its test suite passes.
* Fix some false positives for the cellvar-from-loop warnings.
Closes issue #233.
* Return new astroid class nodes when the inferencer can detect that
that result of a function invocation on a type (like ``type`` or
`abc.ABCMeta`) is requested. Closes #205.
* Emit 'undefined-variable' for undefined names when using the
Python 3 ``metaclass=`` argument.
* Checkers respect priority now. Close issue #229.
* Fix a false positive regarding W0511. Closes issue #149.
* Fix unused-import false positive with Python 3 metaclasses (#143).
* Don't warn with 'bad-format-character' when encountering
the 'a' format on Python 3.
* Add multiple checks for PEP 3101 advanced string formatting:
'bad-format-string', 'missing-format-argument-key',
'unused-format-string-argument', 'format-combined-specification',
'missing-format-attribute' and 'invalid-format-index'.
* Issue broad-except and bare-except even if the number
of except handlers is different than 1. Fixes issue #113.
* Issue attribute-defined-outside-init for all cases, not just
for the last assignment. Closes issue #262.
* Emit 'not-callable' when calling properties. Closes issue #268.
* Fix a false positive with unbalanced iterable unpacking,
when encountering starred nodes. Closes issue #273.
* Add new checks, 'invalid-slice-index' and 'invalid-sequence-index'
for invalid sequence and slice indices.
* Add 'assigning-non-slot' warning, which detects assignments to
attributes not defined in slots.
* Don't emit 'no-name-in-module' for ignored modules.
Closes issue #223.
* Fix an 'unused-variable' false positive, where the variable is
assigned through an import. Closes issue #196.
* Definition order is considered for classes, function arguments
and annotations. Closes issue #257.
* Don't emit 'unused-variable' when assigning to a nonlocal.
Closes issue #275.
* Do not let ImportError propagate from the import checker, leading to crash
in some namespace package related cases. Closes issue #203.
* Don't emit 'pointless-string-statement' for attribute docstrings.
Closes issue #193.
* Use the proper mode for pickle when opening and writing the stats file.
Closes issue #148.
* Don't emit hidden-method message when the attribute has been
monkey-patched, you're on your own when you do that.
* Only emit attribute-defined-outside-init for definition within the same
module as the offended class, avoiding to mangle the output in some cases.
* Don't emit 'unnecessary-lambda' if the body of the lambda call contains
call chaining. Closes issue #243.
* Don't emit 'missing-docstring' when the actual docstring uses ``.format``.
Closes issue #281.
What's New in Pylint 1.2.1?
===========================
Release date: 2014-04-30
* Restore the ability to specify the init-hook option via the
configuration file, which was accidentally broken in 1.2.0.
* Add a new warning [bad-continuation] for badly indentend continued
lines.
* Emit [assignment-from-none] when the function contains bare returns.
Fixes BitBucket issue #191.
* Added a new warning for closing over variables that are
defined in loops. Fixes Bitbucket issue #176.
* Do not warn about \u escapes in string literals when Unicode literals
are used for Python 2.*. Fixes BitBucket issue #151.
* Extend the checking for unbalanced-tuple-unpacking and
unpacking-non-sequence to instance attribute unpacking as well.
* Fix explicit checking of python script (1.2 regression, #219)
* Restore --init-hook, renamed accidentally into --init-hooks in 1.2.0
(#211)
* Add 'indexing-exception' warning, which detects that indexing
an exception occurs in Python 2 (behaviour removed in Python 3).
What's New in Pylint 1.2.0?
===========================
Release date: 2014-04-18
* Pass the current python paths to pylint process when invoked via
epylint. Fixes BitBucket issue #133.
* Add -i / --include-ids and -s / --symbols back as completely ignored
options. Fixes BitBucket issue #180.
* Extend the number of cases in which logging calls are detected. Fixes
bitbucket issue #182.
* Improve pragma handling to not detect pylint:* strings in non-comments.
Fixes BitBucket issue #79.
* Do not crash with UnknownMessage if an unknown message ID/name appears
in disable or enable in the configuration. Patch by Cole Robinson.
Fixes bitbucket issue #170.
* Add new warning 'eval-used', checking that the builtin function ``eval``
was used.