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<a href="googleapiclient-module.html">Package&nbsp;googleapiclient</a> ::
Module&nbsp;_helpers
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<!-- ==================== MODULE DESCRIPTION ==================== -->
<h1 class="epydoc">Module _helpers</h1><p class="nomargin-top"><span class="codelink"><a href="googleapiclient._helpers-pysrc.html">source&nbsp;code</a></span></p>
<pre class="literalblock">
Helper functions for commonly used utilities.
</pre>
<!-- ==================== FUNCTIONS ==================== -->
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<span class="summary-type">&nbsp;</span>
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<td><span class="summary-sig"><a href="googleapiclient._helpers-module.html#positional" class="summary-sig-name">positional</a>(<span class="summary-sig-arg">max_positional_args</span>)</span><br />
A decorator to declare that only the first N arguments my be positional.</td>
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<span class="codelink"><a href="googleapiclient._helpers-pysrc.html#positional">source&nbsp;code</a></span>
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<span class="summary-type">&nbsp;</span>
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<td><span class="summary-sig"><a href="googleapiclient._helpers-module.html#parse_unique_urlencoded" class="summary-sig-name">parse_unique_urlencoded</a>(<span class="summary-sig-arg">content</span>)</span><br />
Parses unique key-value parameters from urlencoded content.</td>
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<span class="codelink"><a href="googleapiclient._helpers-pysrc.html#parse_unique_urlencoded">source&nbsp;code</a></span>
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<td><span class="summary-sig"><a href="googleapiclient._helpers-module.html#update_query_params" class="summary-sig-name">update_query_params</a>(<span class="summary-sig-arg">uri</span>,
<span class="summary-sig-arg">params</span>)</span><br />
Updates a URI with new query parameters.</td>
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<span class="codelink"><a href="googleapiclient._helpers-pysrc.html#update_query_params">source&nbsp;code</a></span>
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<td><span class="summary-sig"><a href="googleapiclient._helpers-module.html#_add_query_parameter" class="summary-sig-name" onclick="show_private();">_add_query_parameter</a>(<span class="summary-sig-arg">url</span>,
<span class="summary-sig-arg">name</span>,
<span class="summary-sig-arg">value</span>)</span><br />
Adds a query parameter to a url.</td>
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<span class="codelink"><a href="googleapiclient._helpers-pysrc.html#_add_query_parameter">source&nbsp;code</a></span>
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<!-- ==================== VARIABLES ==================== -->
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<span class="summary-type">&nbsp;</span>
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<a name="logger"></a><span class="summary-name">logger</span> = <code title="logging.getLogger(__name__)">logging.getLogger(__name__)</code>
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<span class="summary-type">&nbsp;</span>
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<a name="POSITIONAL_WARNING"></a><span class="summary-name">POSITIONAL_WARNING</span> = <code title="'WARNING'">'WARNING'</code>
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<span class="summary-type">&nbsp;</span>
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<a name="POSITIONAL_EXCEPTION"></a><span class="summary-name">POSITIONAL_EXCEPTION</span> = <code title="'EXCEPTION'">'EXCEPTION'</code>
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<span class="summary-type">&nbsp;</span>
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<a name="POSITIONAL_IGNORE"></a><span class="summary-name">POSITIONAL_IGNORE</span> = <code title="'IGNORE'">'IGNORE'</code>
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<span class="summary-type">&nbsp;</span>
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<a href="googleapiclient._helpers-module.html#POSITIONAL_SET" class="summary-name">POSITIONAL_SET</a> = <code title="frozenset([POSITIONAL_WARNING, POSITIONAL_EXCEPTION, POSITIONAL_IGNORE\
])">frozenset([POSITIONAL_WARNING, POSITIONAL_EXC<code class="variable-ellipsis">...</code></code>
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<span class="summary-type">&nbsp;</span>
</td><td class="summary">
<a name="positional_parameters_enforcement"></a><span class="summary-name">positional_parameters_enforcement</span> = <code title="'WARNING'">'WARNING'</code>
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<span class="summary-type">&nbsp;</span>
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<a name="_SYM_LINK_MESSAGE"></a><span class="summary-name">_SYM_LINK_MESSAGE</span> = <code title="'File: {0}: Is a symbolic link.'">'File: {0}: Is a symbolic link.'</code>
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<a name="_IS_DIR_MESSAGE"></a><span class="summary-name">_IS_DIR_MESSAGE</span> = <code title="'{0}: Is a directory'">'{0}: Is a directory'</code>
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<span class="summary-type">&nbsp;</span>
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<a href="googleapiclient._helpers-module.html#_MISSING_FILE_MESSAGE" class="summary-name" onclick="show_private();">_MISSING_FILE_MESSAGE</a> = <code title="'Cannot access {0}: No such file or directory'">'Cannot access {0}: No such file or di<code class="variable-ellipsis">...</code></code>
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<!-- ==================== FUNCTION DETAILS ==================== -->
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<a name="positional"></a>
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<h3 class="epydoc"><span class="sig"><span class="sig-name">positional</span>(<span class="sig-arg">max_positional_args</span>)</span>
</h3>
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><span class="codelink"><a href="googleapiclient._helpers-pysrc.html#positional">source&nbsp;code</a></span>&nbsp;
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<pre class="literalblock">
A decorator to declare that only the first N arguments my be positional.
This decorator makes it easy to support Python 3 style keyword-only
parameters. For example, in Python 3 it is possible to write::
def fn(pos1, *, kwonly1=None, kwonly1=None):
...
All named parameters after ``*`` must be a keyword::
fn(10, 'kw1', 'kw2') # Raises exception.
fn(10, kwonly1='kw1') # Ok.
Example
^^^^^^^
To define a function like above, do::
@positional(1)
def fn(pos1, kwonly1=None, kwonly2=None):
...
If no default value is provided to a keyword argument, it becomes a
required keyword argument::
@positional(0)
def fn(required_kw):
...
This must be called with the keyword parameter::
fn() # Raises exception.
fn(10) # Raises exception.
fn(required_kw=10) # Ok.
When defining instance or class methods always remember to account for
``self`` and ``cls``::
class MyClass(object):
@positional(2)
def my_method(self, pos1, kwonly1=None):
...
@classmethod
@positional(2)
def my_method(cls, pos1, kwonly1=None):
...
The positional decorator behavior is controlled by
``_helpers.positional_parameters_enforcement``, which may be set to
``POSITIONAL_EXCEPTION``, ``POSITIONAL_WARNING`` or
``POSITIONAL_IGNORE`` to raise an exception, log a warning, or do
nothing, respectively, if a declaration is violated.
Args:
max_positional_arguments: Maximum number of positional arguments. All
parameters after the this index must be
keyword only.
Returns:
A decorator that prevents using arguments after max_positional_args
from being used as positional parameters.
Raises:
TypeError: if a key-word only argument is provided as a positional
parameter, but only if
_helpers.positional_parameters_enforcement is set to
POSITIONAL_EXCEPTION.
</pre>
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<a name="parse_unique_urlencoded"></a>
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<h3 class="epydoc"><span class="sig"><span class="sig-name">parse_unique_urlencoded</span>(<span class="sig-arg">content</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="googleapiclient._helpers-pysrc.html#parse_unique_urlencoded">source&nbsp;code</a></span>&nbsp;
</td>
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<pre class="literalblock">
Parses unique key-value parameters from urlencoded content.
Args:
content: string, URL-encoded key-value pairs.
Returns:
dict, The key-value pairs from ``content``.
Raises:
ValueError: if one of the keys is repeated.
</pre>
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<a name="update_query_params"></a>
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<h3 class="epydoc"><span class="sig"><span class="sig-name">update_query_params</span>(<span class="sig-arg">uri</span>,
<span class="sig-arg">params</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="googleapiclient._helpers-pysrc.html#update_query_params">source&nbsp;code</a></span>&nbsp;
</td>
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<pre class="literalblock">
Updates a URI with new query parameters.
If a given key from ``params`` is repeated in the ``uri``, then
the URI will be considered invalid and an error will occur.
If the URI is valid, then each value from ``params`` will
replace the corresponding value in the query parameters (if
it exists).
Args:
uri: string, A valid URI, with potential existing query parameters.
params: dict, A dictionary of query parameters.
Returns:
The same URI but with the new query parameters added.
</pre>
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<a name="_add_query_parameter"></a>
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<h3 class="epydoc"><span class="sig"><span class="sig-name">_add_query_parameter</span>(<span class="sig-arg">url</span>,
<span class="sig-arg">name</span>,
<span class="sig-arg">value</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="googleapiclient._helpers-pysrc.html#_add_query_parameter">source&nbsp;code</a></span>&nbsp;
</td>
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<pre class="literalblock">
Adds a query parameter to a url.
Replaces the current value if it already exists in the URL.
Args:
url: string, url to add the query parameter to.
name: string, query parameter name.
value: string, query parameter value.
Returns:
Updated query parameter. Does not update the url if value is None.
</pre>
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<a name="POSITIONAL_SET"></a>
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<h3 class="epydoc">POSITIONAL_SET</h3>
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</dl>
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<dt>Value:</dt>
<dd><table><tr><td><pre class="variable">
frozenset([POSITIONAL_WARNING, POSITIONAL_EXCEPTION, POSITIONAL_IGNORE<span class="variable-linewrap"><img src="crarr.png" alt="\" /></span>
])
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<h3 class="epydoc">_MISSING_FILE_MESSAGE</h3>
<dl class="fields">
</dl>
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<dt>Value:</dt>
<dd><table><tr><td><pre class="variable">
'Cannot access {0}: No such file or directory'
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