| import collections | |
| import collections.abc | |
| import gc | |
| import pickle | |
| import random | |
| import string | |
| import sys | |
| import unittest | |
| import weakref | |
| from test import support | |
| class DictTest(unittest.TestCase): | |
| def test_invalid_keyword_arguments(self): | |
| class Custom(dict): | |
| pass | |
| for invalid in {1 : 2}, Custom({1 : 2}): | |
| with self.assertRaises(TypeError): | |
| dict(**invalid) | |
| with self.assertRaises(TypeError): | |
| {}.update(**invalid) | |
| def test_constructor(self): | |
| # calling built-in types without argument must return empty | |
| self.assertEqual(dict(), {}) | |
| self.assertIsNot(dict(), {}) | |
| def test_literal_constructor(self): | |
| # check literal constructor for different sized dicts | |
| # (to exercise the BUILD_MAP oparg). | |
| for n in (0, 1, 6, 256, 400): | |
| items = [(''.join(random.sample(string.ascii_letters, 8)), i) | |
| for i in range(n)] | |
| random.shuffle(items) | |
| formatted_items = ('{!r}: {:d}'.format(k, v) for k, v in items) | |
| dictliteral = '{' + ', '.join(formatted_items) + '}' | |
| self.assertEqual(eval(dictliteral), dict(items)) | |
| def test_merge_operator(self): | |
| a = {0: 0, 1: 1, 2: 1} | |
| b = {1: 1, 2: 2, 3: 3} | |
| c = a.copy() | |
| c |= b | |
| self.assertEqual(a | b, {0: 0, 1: 1, 2: 2, 3: 3}) | |
| self.assertEqual(c, {0: 0, 1: 1, 2: 2, 3: 3}) | |
| c = b.copy() | |
| c |= a | |
| self.assertEqual(b | a, {1: 1, 2: 1, 3: 3, 0: 0}) | |
| self.assertEqual(c, {1: 1, 2: 1, 3: 3, 0: 0}) | |
| c = a.copy() | |
| c |= [(1, 1), (2, 2), (3, 3)] | |
| self.assertEqual(c, {0: 0, 1: 1, 2: 2, 3: 3}) | |
| self.assertIs(a.__or__(None), NotImplemented) | |
| self.assertIs(a.__or__(()), NotImplemented) | |
| self.assertIs(a.__or__("BAD"), NotImplemented) | |
| self.assertIs(a.__or__(""), NotImplemented) | |
| self.assertRaises(TypeError, a.__ior__, None) | |
| self.assertEqual(a.__ior__(()), {0: 0, 1: 1, 2: 1}) | |
| self.assertRaises(ValueError, a.__ior__, "BAD") | |
| self.assertEqual(a.__ior__(""), {0: 0, 1: 1, 2: 1}) | |
| def test_bool(self): | |
| self.assertIs(not {}, True) | |
| self.assertTrue({1: 2}) | |
| self.assertIs(bool({}), False) | |
| self.assertIs(bool({1: 2}), True) | |
| def test_keys(self): | |
| d = {} | |
| self.assertEqual(set(d.keys()), set()) | |
| d = {'a': 1, 'b': 2} | |
| k = d.keys() | |
| self.assertEqual(set(k), {'a', 'b'}) | |
| self.assertIn('a', k) | |
| self.assertIn('b', k) | |
| self.assertIn('a', d) | |
| self.assertIn('b', d) | |
| self.assertRaises(TypeError, d.keys, None) | |
| self.assertEqual(repr(dict(a=1).keys()), "dict_keys(['a'])") | |
| def test_values(self): | |
| d = {} | |
| self.assertEqual(set(d.values()), set()) | |
| d = {1:2} | |
| self.assertEqual(set(d.values()), {2}) | |
| self.assertRaises(TypeError, d.values, None) | |
| self.assertEqual(repr(dict(a=1).values()), "dict_values([1])") | |
| def test_items(self): | |
| d = {} | |
| self.assertEqual(set(d.items()), set()) | |
| d = {1:2} | |
| self.assertEqual(set(d.items()), {(1, 2)}) | |
| self.assertRaises(TypeError, d.items, None) | |
| self.assertEqual(repr(dict(a=1).items()), "dict_items([('a', 1)])") | |
| def test_views_mapping(self): | |
| mappingproxy = type(type.__dict__) | |
| class Dict(dict): | |
| pass | |
| for cls in [dict, Dict]: | |
| d = cls() | |
| m1 = d.keys().mapping | |
| m2 = d.values().mapping | |
| m3 = d.items().mapping | |
| for m in [m1, m2, m3]: | |
| self.assertIsInstance(m, mappingproxy) | |
| self.assertEqual(m, d) | |
| d["foo"] = "bar" | |
| for m in [m1, m2, m3]: | |
| self.assertIsInstance(m, mappingproxy) | |
| self.assertEqual(m, d) | |
| def test_contains(self): | |
| d = {} | |
| self.assertNotIn('a', d) | |
| self.assertFalse('a' in d) | |
| self.assertTrue('a' not in d) | |
| d = {'a': 1, 'b': 2} | |
| self.assertIn('a', d) | |
| self.assertIn('b', d) | |
| self.assertNotIn('c', d) | |
| self.assertRaises(TypeError, d.__contains__) | |
| def test_len(self): | |
| d = {} | |
| self.assertEqual(len(d), 0) | |
| d = {'a': 1, 'b': 2} | |
| self.assertEqual(len(d), 2) | |
| def test_getitem(self): | |
| d = {'a': 1, 'b': 2} | |
| self.assertEqual(d['a'], 1) | |
| self.assertEqual(d['b'], 2) | |
| d['c'] = 3 | |
| d['a'] = 4 | |
| self.assertEqual(d['c'], 3) | |
| self.assertEqual(d['a'], 4) | |
| del d['b'] | |
| self.assertEqual(d, {'a': 4, 'c': 3}) | |
| self.assertRaises(TypeError, d.__getitem__) | |
| class BadEq(object): | |
| def __eq__(self, other): | |
| raise Exc() | |
| def __hash__(self): | |
| return 24 | |
| d = {} | |
| d[BadEq()] = 42 | |
| self.assertRaises(KeyError, d.__getitem__, 23) | |
| class Exc(Exception): pass | |
| class BadHash(object): | |
| fail = False | |
| def __hash__(self): | |
| if self.fail: | |
| raise Exc() | |
| else: | |
| return 42 | |
| x = BadHash() | |
| d[x] = 42 | |
| x.fail = True | |
| self.assertRaises(Exc, d.__getitem__, x) | |
| def test_clear(self): | |
| d = {1:1, 2:2, 3:3} | |
| d.clear() | |
| self.assertEqual(d, {}) | |
| self.assertRaises(TypeError, d.clear, None) | |
| def test_update(self): | |
| d = {} | |
| d.update({1:100}) | |
| d.update({2:20}) | |
| d.update({1:1, 2:2, 3:3}) | |
| self.assertEqual(d, {1:1, 2:2, 3:3}) | |
| d.update() | |
| self.assertEqual(d, {1:1, 2:2, 3:3}) | |
| self.assertRaises((TypeError, AttributeError), d.update, None) | |
| class SimpleUserDict: | |
| def __init__(self): | |
| self.d = {1:1, 2:2, 3:3} | |
| def keys(self): | |
| return self.d.keys() | |
| def __getitem__(self, i): | |
| return self.d[i] | |
| d.clear() | |
| d.update(SimpleUserDict()) | |
| self.assertEqual(d, {1:1, 2:2, 3:3}) | |
| class Exc(Exception): pass | |
| d.clear() | |
| class FailingUserDict: | |
| def keys(self): | |
| raise Exc | |
| self.assertRaises(Exc, d.update, FailingUserDict()) | |
| class FailingUserDict: | |
| def keys(self): | |
| class BogonIter: | |
| def __init__(self): | |
| self.i = 1 | |
| def __iter__(self): | |
| return self | |
| def __next__(self): | |
| if self.i: | |
| self.i = 0 | |
| return 'a' | |
| raise Exc | |
| return BogonIter() | |
| def __getitem__(self, key): | |
| return key | |
| self.assertRaises(Exc, d.update, FailingUserDict()) | |
| class FailingUserDict: | |
| def keys(self): | |
| class BogonIter: | |
| def __init__(self): | |
| self.i = ord('a') | |
| def __iter__(self): | |
| return self | |
| def __next__(self): | |
| if self.i <= ord('z'): | |
| rtn = chr(self.i) | |
| self.i += 1 | |
| return rtn | |
| raise StopIteration | |
| return BogonIter() | |
| def __getitem__(self, key): | |
| raise Exc | |
| self.assertRaises(Exc, d.update, FailingUserDict()) | |
| class badseq(object): | |
| def __iter__(self): | |
| return self | |
| def __next__(self): | |
| raise Exc() | |
| self.assertRaises(Exc, {}.update, badseq()) | |
| self.assertRaises(ValueError, {}.update, [(1, 2, 3)]) | |
| def test_fromkeys(self): | |
| self.assertEqual(dict.fromkeys('abc'), {'a':None, 'b':None, 'c':None}) | |
| d = {} | |
| self.assertIsNot(d.fromkeys('abc'), d) | |
| self.assertEqual(d.fromkeys('abc'), {'a':None, 'b':None, 'c':None}) | |
| self.assertEqual(d.fromkeys((4,5),0), {4:0, 5:0}) | |
| self.assertEqual(d.fromkeys([]), {}) | |
| def g(): | |
| yield 1 | |
| self.assertEqual(d.fromkeys(g()), {1:None}) | |
| self.assertRaises(TypeError, {}.fromkeys, 3) | |
| class dictlike(dict): pass | |
| self.assertEqual(dictlike.fromkeys('a'), {'a':None}) | |
| self.assertEqual(dictlike().fromkeys('a'), {'a':None}) | |
| self.assertIsInstance(dictlike.fromkeys('a'), dictlike) | |
| self.assertIsInstance(dictlike().fromkeys('a'), dictlike) | |
| class mydict(dict): | |
| def __new__(cls): | |
| return collections.UserDict() | |
| ud = mydict.fromkeys('ab') | |
| self.assertEqual(ud, {'a':None, 'b':None}) | |
| self.assertIsInstance(ud, collections.UserDict) | |
| self.assertRaises(TypeError, dict.fromkeys) | |
| class Exc(Exception): pass | |
| class baddict1(dict): | |
| def __init__(self): | |
| raise Exc() | |
| self.assertRaises(Exc, baddict1.fromkeys, [1]) | |
| class BadSeq(object): | |
| def __iter__(self): | |
| return self | |
| def __next__(self): | |
| raise Exc() | |
| self.assertRaises(Exc, dict.fromkeys, BadSeq()) | |
| class baddict2(dict): | |
| def __setitem__(self, key, value): | |
| raise Exc() | |
| self.assertRaises(Exc, baddict2.fromkeys, [1]) | |
| # test fast path for dictionary inputs | |
| d = dict(zip(range(6), range(6))) | |
| self.assertEqual(dict.fromkeys(d, 0), dict(zip(range(6), [0]*6))) | |
| class baddict3(dict): | |
| def __new__(cls): | |
| return d | |
| d = {i : i for i in range(10)} | |
| res = d.copy() | |
| res.update(a=None, b=None, c=None) | |
| self.assertEqual(baddict3.fromkeys({"a", "b", "c"}), res) | |
| def test_copy(self): | |
| d = {1: 1, 2: 2, 3: 3} | |
| self.assertIsNot(d.copy(), d) | |
| self.assertEqual(d.copy(), d) | |
| self.assertEqual(d.copy(), {1: 1, 2: 2, 3: 3}) | |
| copy = d.copy() | |
| d[4] = 4 | |
| self.assertNotEqual(copy, d) | |
| self.assertEqual({}.copy(), {}) | |
| self.assertRaises(TypeError, d.copy, None) | |
| def test_copy_fuzz(self): | |
| for dict_size in [10, 100, 1000, 10000, 100000]: | |
| dict_size = random.randrange( | |
| dict_size // 2, dict_size + dict_size // 2) | |
| with self.subTest(dict_size=dict_size): | |
| d = {} | |
| for i in range(dict_size): | |
| d[i] = i | |
| d2 = d.copy() | |
| self.assertIsNot(d2, d) | |
| self.assertEqual(d, d2) | |
| d2['key'] = 'value' | |
| self.assertNotEqual(d, d2) | |
| self.assertEqual(len(d2), len(d) + 1) | |
| def test_copy_maintains_tracking(self): | |
| class A: | |
| pass | |
| key = A() | |
| for d in ({}, {'a': 1}, {key: 'val'}): | |
| d2 = d.copy() | |
| self.assertEqual(gc.is_tracked(d), gc.is_tracked(d2)) | |
| def test_copy_noncompact(self): | |
| # Dicts don't compact themselves on del/pop operations. | |
| # Copy will use a slow merging strategy that produces | |
| # a compacted copy when roughly 33% of dict is a non-used | |
| # keys-space (to optimize memory footprint). | |
| # In this test we want to hit the slow/compacting | |
| # branch of dict.copy() and make sure it works OK. | |
| d = {k: k for k in range(1000)} | |
| for k in range(950): | |
| del d[k] | |
| d2 = d.copy() | |
| self.assertEqual(d2, d) | |
| def test_get(self): | |
| d = {} | |
| self.assertIs(d.get('c'), None) | |
| self.assertEqual(d.get('c', 3), 3) | |
| d = {'a': 1, 'b': 2} | |
| self.assertIs(d.get('c'), None) | |
| self.assertEqual(d.get('c', 3), 3) | |
| self.assertEqual(d.get('a'), 1) | |
| self.assertEqual(d.get('a', 3), 1) | |
| self.assertRaises(TypeError, d.get) | |
| self.assertRaises(TypeError, d.get, None, None, None) | |
| def test_setdefault(self): | |
| # dict.setdefault() | |
| d = {} | |
| self.assertIs(d.setdefault('key0'), None) | |
| d.setdefault('key0', []) | |
| self.assertIs(d.setdefault('key0'), None) | |
| d.setdefault('key', []).append(3) | |
| self.assertEqual(d['key'][0], 3) | |
| d.setdefault('key', []).append(4) | |
| self.assertEqual(len(d['key']), 2) | |
| self.assertRaises(TypeError, d.setdefault) | |
| class Exc(Exception): pass | |
| class BadHash(object): | |
| fail = False | |
| def __hash__(self): | |
| if self.fail: | |
| raise Exc() | |
| else: | |
| return 42 | |
| x = BadHash() | |
| d[x] = 42 | |
| x.fail = True | |
| self.assertRaises(Exc, d.setdefault, x, []) | |
| def test_setdefault_atomic(self): | |
| # Issue #13521: setdefault() calls __hash__ and __eq__ only once. | |
| class Hashed(object): | |
| def __init__(self): | |
| self.hash_count = 0 | |
| self.eq_count = 0 | |
| def __hash__(self): | |
| self.hash_count += 1 | |
| return 42 | |
| def __eq__(self, other): | |
| self.eq_count += 1 | |
| return id(self) == id(other) | |
| hashed1 = Hashed() | |
| y = {hashed1: 5} | |
| hashed2 = Hashed() | |
| y.setdefault(hashed2, []) | |
| self.assertEqual(hashed1.hash_count, 1) | |
| self.assertEqual(hashed2.hash_count, 1) | |
| self.assertEqual(hashed1.eq_count + hashed2.eq_count, 1) | |
| def test_setitem_atomic_at_resize(self): | |
| class Hashed(object): | |
| def __init__(self): | |
| self.hash_count = 0 | |
| self.eq_count = 0 | |
| def __hash__(self): | |
| self.hash_count += 1 | |
| return 42 | |
| def __eq__(self, other): | |
| self.eq_count += 1 | |
| return id(self) == id(other) | |
| hashed1 = Hashed() | |
| # 5 items | |
| y = {hashed1: 5, 0: 0, 1: 1, 2: 2, 3: 3} | |
| hashed2 = Hashed() | |
| # 6th item forces a resize | |
| y[hashed2] = [] | |
| self.assertEqual(hashed1.hash_count, 1) | |
| self.assertEqual(hashed2.hash_count, 1) | |
| self.assertEqual(hashed1.eq_count + hashed2.eq_count, 1) | |
| def test_popitem(self): | |
| # dict.popitem() | |
| for copymode in -1, +1: | |
| # -1: b has same structure as a | |
| # +1: b is a.copy() | |
| for log2size in range(12): | |
| size = 2**log2size | |
| a = {} | |
| b = {} | |
| for i in range(size): | |
| a[repr(i)] = i | |
| if copymode < 0: | |
| b[repr(i)] = i | |
| if copymode > 0: | |
| b = a.copy() | |
| for i in range(size): | |
| ka, va = ta = a.popitem() | |
| self.assertEqual(va, int(ka)) | |
| kb, vb = tb = b.popitem() | |
| self.assertEqual(vb, int(kb)) | |
| self.assertFalse(copymode < 0 and ta != tb) | |
| self.assertFalse(a) | |
| self.assertFalse(b) | |
| d = {} | |
| self.assertRaises(KeyError, d.popitem) | |
| def test_pop(self): | |
| # Tests for pop with specified key | |
| d = {} | |
| k, v = 'abc', 'def' | |
| d[k] = v | |
| self.assertRaises(KeyError, d.pop, 'ghi') | |
| self.assertEqual(d.pop(k), v) | |
| self.assertEqual(len(d), 0) | |
| self.assertRaises(KeyError, d.pop, k) | |
| self.assertEqual(d.pop(k, v), v) | |
| d[k] = v | |
| self.assertEqual(d.pop(k, 1), v) | |
| self.assertRaises(TypeError, d.pop) | |
| class Exc(Exception): pass | |
| class BadHash(object): | |
| fail = False | |
| def __hash__(self): | |
| if self.fail: | |
| raise Exc() | |
| else: | |
| return 42 | |
| x = BadHash() | |
| d[x] = 42 | |
| x.fail = True | |
| self.assertRaises(Exc, d.pop, x) | |
| def test_mutating_iteration(self): | |
| # changing dict size during iteration | |
| d = {} | |
| d[1] = 1 | |
| with self.assertRaises(RuntimeError): | |
| for i in d: | |
| d[i+1] = 1 | |
| def test_mutating_iteration_delete(self): | |
| # change dict content during iteration | |
| d = {} | |
| d[0] = 0 | |
| with self.assertRaises(RuntimeError): | |
| for i in d: | |
| del d[0] | |
| d[0] = 0 | |
| def test_mutating_iteration_delete_over_values(self): | |
| # change dict content during iteration | |
| d = {} | |
| d[0] = 0 | |
| with self.assertRaises(RuntimeError): | |
| for i in d.values(): | |
| del d[0] | |
| d[0] = 0 | |
| def test_mutating_iteration_delete_over_items(self): | |
| # change dict content during iteration | |
| d = {} | |
| d[0] = 0 | |
| with self.assertRaises(RuntimeError): | |
| for i in d.items(): | |
| del d[0] | |
| d[0] = 0 | |
| def test_mutating_lookup(self): | |
| # changing dict during a lookup (issue #14417) | |
| class NastyKey: | |
| mutate_dict = None | |
| def __init__(self, value): | |
| self.value = value | |
| def __hash__(self): | |
| # hash collision! | |
| return 1 | |
| def __eq__(self, other): | |
| if NastyKey.mutate_dict: | |
| mydict, key = NastyKey.mutate_dict | |
| NastyKey.mutate_dict = None | |
| del mydict[key] | |
| return self.value == other.value | |
| key1 = NastyKey(1) | |
| key2 = NastyKey(2) | |
| d = {key1: 1} | |
| NastyKey.mutate_dict = (d, key1) | |
| d[key2] = 2 | |
| self.assertEqual(d, {key2: 2}) | |
| def test_repr(self): | |
| d = {} | |
| self.assertEqual(repr(d), '{}') | |
| d[1] = 2 | |
| self.assertEqual(repr(d), '{1: 2}') | |
| d = {} | |
| d[1] = d | |
| self.assertEqual(repr(d), '{1: {...}}') | |
| class Exc(Exception): pass | |
| class BadRepr(object): | |
| def __repr__(self): | |
| raise Exc() | |
| d = {1: BadRepr()} | |
| self.assertRaises(Exc, repr, d) | |
| def test_repr_deep(self): | |
| d = {} | |
| for i in range(sys.getrecursionlimit() + 100): | |
| d = {1: d} | |
| self.assertRaises(RecursionError, repr, d) | |
| def test_eq(self): | |
| self.assertEqual({}, {}) | |
| self.assertEqual({1: 2}, {1: 2}) | |
| class Exc(Exception): pass | |
| class BadCmp(object): | |
| def __eq__(self, other): | |
| raise Exc() | |
| def __hash__(self): | |
| return 1 | |
| d1 = {BadCmp(): 1} | |
| d2 = {1: 1} | |
| with self.assertRaises(Exc): | |
| d1 == d2 | |
| def test_keys_contained(self): | |
| self.helper_keys_contained(lambda x: x.keys()) | |
| self.helper_keys_contained(lambda x: x.items()) | |
| def helper_keys_contained(self, fn): | |
| # Test rich comparisons against dict key views, which should behave the | |
| # same as sets. | |
| empty = fn(dict()) | |
| empty2 = fn(dict()) | |
| smaller = fn({1:1, 2:2}) | |
| larger = fn({1:1, 2:2, 3:3}) | |
| larger2 = fn({1:1, 2:2, 3:3}) | |
| larger3 = fn({4:1, 2:2, 3:3}) | |
| self.assertTrue(smaller < larger) | |
| self.assertTrue(smaller <= larger) | |
| self.assertTrue(larger > smaller) | |
| self.assertTrue(larger >= smaller) | |
| self.assertFalse(smaller >= larger) | |
| self.assertFalse(smaller > larger) | |
| self.assertFalse(larger <= smaller) | |
| self.assertFalse(larger < smaller) | |
| self.assertFalse(smaller < larger3) | |
| self.assertFalse(smaller <= larger3) | |
| self.assertFalse(larger3 > smaller) | |
| self.assertFalse(larger3 >= smaller) | |
| # Inequality strictness | |
| self.assertTrue(larger2 >= larger) | |
| self.assertTrue(larger2 <= larger) | |
| self.assertFalse(larger2 > larger) | |
| self.assertFalse(larger2 < larger) | |
| self.assertTrue(larger == larger2) | |
| self.assertTrue(smaller != larger) | |
| # There is an optimization on the zero-element case. | |
| self.assertTrue(empty == empty2) | |
| self.assertFalse(empty != empty2) | |
| self.assertFalse(empty == smaller) | |
| self.assertTrue(empty != smaller) | |
| # With the same size, an elementwise compare happens | |
| self.assertTrue(larger != larger3) | |
| self.assertFalse(larger == larger3) | |
| def test_errors_in_view_containment_check(self): | |
| class C: | |
| def __eq__(self, other): | |
| raise RuntimeError | |
| d1 = {1: C()} | |
| d2 = {1: C()} | |
| with self.assertRaises(RuntimeError): | |
| d1.items() == d2.items() | |
| with self.assertRaises(RuntimeError): | |
| d1.items() != d2.items() | |
| with self.assertRaises(RuntimeError): | |
| d1.items() <= d2.items() | |
| with self.assertRaises(RuntimeError): | |
| d1.items() >= d2.items() | |
| d3 = {1: C(), 2: C()} | |
| with self.assertRaises(RuntimeError): | |
| d2.items() < d3.items() | |
| with self.assertRaises(RuntimeError): | |
| d3.items() > d2.items() | |
| def test_dictview_set_operations_on_keys(self): | |
| k1 = {1:1, 2:2}.keys() | |
| k2 = {1:1, 2:2, 3:3}.keys() | |
| k3 = {4:4}.keys() | |
| self.assertEqual(k1 - k2, set()) | |
| self.assertEqual(k1 - k3, {1,2}) | |
| self.assertEqual(k2 - k1, {3}) | |
| self.assertEqual(k3 - k1, {4}) | |
| self.assertEqual(k1 & k2, {1,2}) | |
| self.assertEqual(k1 & k3, set()) | |
| self.assertEqual(k1 | k2, {1,2,3}) | |
| self.assertEqual(k1 ^ k2, {3}) | |
| self.assertEqual(k1 ^ k3, {1,2,4}) | |
| def test_dictview_set_operations_on_items(self): | |
| k1 = {1:1, 2:2}.items() | |
| k2 = {1:1, 2:2, 3:3}.items() | |
| k3 = {4:4}.items() | |
| self.assertEqual(k1 - k2, set()) | |
| self.assertEqual(k1 - k3, {(1,1), (2,2)}) | |
| self.assertEqual(k2 - k1, {(3,3)}) | |
| self.assertEqual(k3 - k1, {(4,4)}) | |
| self.assertEqual(k1 & k2, {(1,1), (2,2)}) | |
| self.assertEqual(k1 & k3, set()) | |
| self.assertEqual(k1 | k2, {(1,1), (2,2), (3,3)}) | |
| self.assertEqual(k1 ^ k2, {(3,3)}) | |
| self.assertEqual(k1 ^ k3, {(1,1), (2,2), (4,4)}) | |
| def test_items_symmetric_difference(self): | |
| rr = random.randrange | |
| for _ in range(100): | |
| left = {x:rr(3) for x in range(20) if rr(2)} | |
| right = {x:rr(3) for x in range(20) if rr(2)} | |
| with self.subTest(left=left, right=right): | |
| expected = set(left.items()) ^ set(right.items()) | |
| actual = left.items() ^ right.items() | |
| self.assertEqual(actual, expected) | |
| def test_dictview_mixed_set_operations(self): | |
| # Just a few for .keys() | |
| self.assertTrue({1:1}.keys() == {1}) | |
| self.assertTrue({1} == {1:1}.keys()) | |
| self.assertEqual({1:1}.keys() | {2}, {1, 2}) | |
| self.assertEqual({2} | {1:1}.keys(), {1, 2}) | |
| # And a few for .items() | |
| self.assertTrue({1:1}.items() == {(1,1)}) | |
| self.assertTrue({(1,1)} == {1:1}.items()) | |
| self.assertEqual({1:1}.items() | {2}, {(1,1), 2}) | |
| self.assertEqual({2} | {1:1}.items(), {(1,1), 2}) | |
| def test_missing(self): | |
| # Make sure dict doesn't have a __missing__ method | |
| self.assertFalse(hasattr(dict, "__missing__")) | |
| self.assertFalse(hasattr({}, "__missing__")) | |
| # Test several cases: | |
| # (D) subclass defines __missing__ method returning a value | |
| # (E) subclass defines __missing__ method raising RuntimeError | |
| # (F) subclass sets __missing__ instance variable (no effect) | |
| # (G) subclass doesn't define __missing__ at all | |
| class D(dict): | |
| def __missing__(self, key): | |
| return 42 | |
| d = D({1: 2, 3: 4}) | |
| self.assertEqual(d[1], 2) | |
| self.assertEqual(d[3], 4) | |
| self.assertNotIn(2, d) | |
| self.assertNotIn(2, d.keys()) | |
| self.assertEqual(d[2], 42) | |
| class E(dict): | |
| def __missing__(self, key): | |
| raise RuntimeError(key) | |
| e = E() | |
| with self.assertRaises(RuntimeError) as c: | |
| e[42] | |
| self.assertEqual(c.exception.args, (42,)) | |
| class F(dict): | |
| def __init__(self): | |
| # An instance variable __missing__ should have no effect | |
| self.__missing__ = lambda key: None | |
| f = F() | |
| with self.assertRaises(KeyError) as c: | |
| f[42] | |
| self.assertEqual(c.exception.args, (42,)) | |
| class G(dict): | |
| pass | |
| g = G() | |
| with self.assertRaises(KeyError) as c: | |
| g[42] | |
| self.assertEqual(c.exception.args, (42,)) | |
| def test_tuple_keyerror(self): | |
| # SF #1576657 | |
| d = {} | |
| with self.assertRaises(KeyError) as c: | |
| d[(1,)] | |
| self.assertEqual(c.exception.args, ((1,),)) | |
| def test_bad_key(self): | |
| # Dictionary lookups should fail if __eq__() raises an exception. | |
| class CustomException(Exception): | |
| pass | |
| class BadDictKey: | |
| def __hash__(self): | |
| return hash(self.__class__) | |
| def __eq__(self, other): | |
| if isinstance(other, self.__class__): | |
| raise CustomException | |
| return other | |
| d = {} | |
| x1 = BadDictKey() | |
| x2 = BadDictKey() | |
| d[x1] = 1 | |
| for stmt in ['d[x2] = 2', | |
| 'z = d[x2]', | |
| 'x2 in d', | |
| 'd.get(x2)', | |
| 'd.setdefault(x2, 42)', | |
| 'd.pop(x2)', | |
| 'd.update({x2: 2})']: | |
| with self.assertRaises(CustomException): | |
| exec(stmt, locals()) | |
| def test_resize1(self): | |
| # Dict resizing bug, found by Jack Jansen in 2.2 CVS development. | |
| # This version got an assert failure in debug build, infinite loop in | |
| # release build. Unfortunately, provoking this kind of stuff requires | |
| # a mix of inserts and deletes hitting exactly the right hash codes in | |
| # exactly the right order, and I can't think of a randomized approach | |
| # that would be *likely* to hit a failing case in reasonable time. | |
| d = {} | |
| for i in range(5): | |
| d[i] = i | |
| for i in range(5): | |
| del d[i] | |
| for i in range(5, 9): # i==8 was the problem | |
| d[i] = i | |
| def test_resize2(self): | |
| # Another dict resizing bug (SF bug #1456209). | |
| # This caused Segmentation faults or Illegal instructions. | |
| class X(object): | |
| def __hash__(self): | |
| return 5 | |
| def __eq__(self, other): | |
| if resizing: | |
| d.clear() | |
| return False | |
| d = {} | |
| resizing = False | |
| d[X()] = 1 | |
| d[X()] = 2 | |
| d[X()] = 3 | |
| d[X()] = 4 | |
| d[X()] = 5 | |
| # now trigger a resize | |
| resizing = True | |
| d[9] = 6 | |
| def test_empty_presized_dict_in_freelist(self): | |
| # Bug #3537: if an empty but presized dict with a size larger | |
| # than 7 was in the freelist, it triggered an assertion failure | |
| with self.assertRaises(ZeroDivisionError): | |
| d = {'a': 1 // 0, 'b': None, 'c': None, 'd': None, 'e': None, | |
| 'f': None, 'g': None, 'h': None} | |
| d = {} | |
| def test_container_iterator(self): | |
| # Bug #3680: tp_traverse was not implemented for dictiter and | |
| # dictview objects. | |
| class C(object): | |
| pass | |
| views = (dict.items, dict.values, dict.keys) | |
| for v in views: | |
| obj = C() | |
| ref = weakref.ref(obj) | |
| container = {obj: 1} | |
| obj.v = v(container) | |
| obj.x = iter(obj.v) | |
| del obj, container | |
| gc.collect() | |
| self.assertIs(ref(), None, "Cycle was not collected") | |
| def _not_tracked(self, t): | |
| # Nested containers can take several collections to untrack | |
| gc.collect() | |
| gc.collect() | |
| self.assertFalse(gc.is_tracked(t), t) | |
| def _tracked(self, t): | |
| self.assertTrue(gc.is_tracked(t), t) | |
| gc.collect() | |
| gc.collect() | |
| self.assertTrue(gc.is_tracked(t), t) | |
| @support.cpython_only | |
| def test_track_literals(self): | |
| # Test GC-optimization of dict literals | |
| x, y, z, w = 1.5, "a", (1, None), [] | |
| self._not_tracked({}) | |
| self._not_tracked({x:(), y:x, z:1}) | |
| self._not_tracked({1: "a", "b": 2}) | |
| self._not_tracked({1: 2, (None, True, False, ()): int}) | |
| self._not_tracked({1: object()}) | |
| # Dicts with mutable elements are always tracked, even if those | |
| # elements are not tracked right now. | |
| self._tracked({1: []}) | |
| self._tracked({1: ([],)}) | |
| self._tracked({1: {}}) | |
| self._tracked({1: set()}) | |
| @support.cpython_only | |
| def test_track_dynamic(self): | |
| # Test GC-optimization of dynamically-created dicts | |
| class MyObject(object): | |
| pass | |
| x, y, z, w, o = 1.5, "a", (1, object()), [], MyObject() | |
| d = dict() | |
| self._not_tracked(d) | |
| d[1] = "a" | |
| self._not_tracked(d) | |
| d[y] = 2 | |
| self._not_tracked(d) | |
| d[z] = 3 | |
| self._not_tracked(d) | |
| self._not_tracked(d.copy()) | |
| d[4] = w | |
| self._tracked(d) | |
| self._tracked(d.copy()) | |
| d[4] = None | |
| self._not_tracked(d) | |
| self._not_tracked(d.copy()) | |
| # dd isn't tracked right now, but it may mutate and therefore d | |
| # which contains it must be tracked. | |
| d = dict() | |
| dd = dict() | |
| d[1] = dd | |
| self._not_tracked(dd) | |
| self._tracked(d) | |
| dd[1] = d | |
| self._tracked(dd) | |
| d = dict.fromkeys([x, y, z]) | |
| self._not_tracked(d) | |
| dd = dict() | |
| dd.update(d) | |
| self._not_tracked(dd) | |
| d = dict.fromkeys([x, y, z, o]) | |
| self._tracked(d) | |
| dd = dict() | |
| dd.update(d) | |
| self._tracked(dd) | |
| d = dict(x=x, y=y, z=z) | |
| self._not_tracked(d) | |
| d = dict(x=x, y=y, z=z, w=w) | |
| self._tracked(d) | |
| d = dict() | |
| d.update(x=x, y=y, z=z) | |
| self._not_tracked(d) | |
| d.update(w=w) | |
| self._tracked(d) | |
| d = dict([(x, y), (z, 1)]) | |
| self._not_tracked(d) | |
| d = dict([(x, y), (z, w)]) | |
| self._tracked(d) | |
| d = dict() | |
| d.update([(x, y), (z, 1)]) | |
| self._not_tracked(d) | |
| d.update([(x, y), (z, w)]) | |
| self._tracked(d) | |
| @support.cpython_only | |
| def test_track_subtypes(self): | |
| # Dict subtypes are always tracked | |
| class MyDict(dict): | |
| pass | |
| self._tracked(MyDict()) | |
| def make_shared_key_dict(self, n): | |
| class C: | |
| pass | |
| dicts = [] | |
| for i in range(n): | |
| a = C() | |
| a.x, a.y, a.z = 1, 2, 3 | |
| dicts.append(a.__dict__) | |
| return dicts | |
| @support.cpython_only | |
| def test_splittable_setdefault(self): | |
| """split table must be combined when setdefault() | |
| breaks insertion order""" | |
| a, b = self.make_shared_key_dict(2) | |
| a['a'] = 1 | |
| size_a = sys.getsizeof(a) | |
| a['b'] = 2 | |
| b.setdefault('b', 2) | |
| size_b = sys.getsizeof(b) | |
| b['a'] = 1 | |
| self.assertGreater(size_b, size_a) | |
| self.assertEqual(list(a), ['x', 'y', 'z', 'a', 'b']) | |
| self.assertEqual(list(b), ['x', 'y', 'z', 'b', 'a']) | |
| @support.cpython_only | |
| def test_splittable_del(self): | |
| """split table must be combined when del d[k]""" | |
| a, b = self.make_shared_key_dict(2) | |
| orig_size = sys.getsizeof(a) | |
| del a['y'] # split table is combined | |
| with self.assertRaises(KeyError): | |
| del a['y'] | |
| self.assertGreater(sys.getsizeof(a), orig_size) | |
| self.assertEqual(list(a), ['x', 'z']) | |
| self.assertEqual(list(b), ['x', 'y', 'z']) | |
| # Two dicts have different insertion order. | |
| a['y'] = 42 | |
| self.assertEqual(list(a), ['x', 'z', 'y']) | |
| self.assertEqual(list(b), ['x', 'y', 'z']) | |
| @support.cpython_only | |
| def test_splittable_pop(self): | |
| """split table must be combined when d.pop(k)""" | |
| a, b = self.make_shared_key_dict(2) | |
| orig_size = sys.getsizeof(a) | |
| a.pop('y') # split table is combined | |
| with self.assertRaises(KeyError): | |
| a.pop('y') | |
| self.assertGreater(sys.getsizeof(a), orig_size) | |
| self.assertEqual(list(a), ['x', 'z']) | |
| self.assertEqual(list(b), ['x', 'y', 'z']) | |
| # Two dicts have different insertion order. | |
| a['y'] = 42 | |
| self.assertEqual(list(a), ['x', 'z', 'y']) | |
| self.assertEqual(list(b), ['x', 'y', 'z']) | |
| @support.cpython_only | |
| def test_splittable_pop_pending(self): | |
| """pop a pending key in a split table should not crash""" | |
| a, b = self.make_shared_key_dict(2) | |
| a['a'] = 4 | |
| with self.assertRaises(KeyError): | |
| b.pop('a') | |
| @support.cpython_only | |
| def test_splittable_popitem(self): | |
| """split table must be combined when d.popitem()""" | |
| a, b = self.make_shared_key_dict(2) | |
| orig_size = sys.getsizeof(a) | |
| item = a.popitem() # split table is combined | |
| self.assertEqual(item, ('z', 3)) | |
| with self.assertRaises(KeyError): | |
| del a['z'] | |
| self.assertGreater(sys.getsizeof(a), orig_size) | |
| self.assertEqual(list(a), ['x', 'y']) | |
| self.assertEqual(list(b), ['x', 'y', 'z']) | |
| @support.cpython_only | |
| def test_splittable_setattr_after_pop(self): | |
| """setattr() must not convert combined table into split table.""" | |
| # Issue 28147 | |
| import _testcapi | |
| class C: | |
| pass | |
| a = C() | |
| a.a = 1 | |
| self.assertTrue(_testcapi.dict_hassplittable(a.__dict__)) | |
| # dict.pop() convert it to combined table | |
| a.__dict__.pop('a') | |
| self.assertFalse(_testcapi.dict_hassplittable(a.__dict__)) | |
| # But C should not convert a.__dict__ to split table again. | |
| a.a = 1 | |
| self.assertFalse(_testcapi.dict_hassplittable(a.__dict__)) | |
| # Same for popitem() | |
| a = C() | |
| a.a = 2 | |
| self.assertTrue(_testcapi.dict_hassplittable(a.__dict__)) | |
| a.__dict__.popitem() | |
| self.assertFalse(_testcapi.dict_hassplittable(a.__dict__)) | |
| a.a = 3 | |
| self.assertFalse(_testcapi.dict_hassplittable(a.__dict__)) | |
| def test_iterator_pickling(self): | |
| for proto in range(pickle.HIGHEST_PROTOCOL + 1): | |
| data = {1:"a", 2:"b", 3:"c"} | |
| it = iter(data) | |
| d = pickle.dumps(it, proto) | |
| it = pickle.loads(d) | |
| self.assertEqual(list(it), list(data)) | |
| it = pickle.loads(d) | |
| try: | |
| drop = next(it) | |
| except StopIteration: | |
| continue | |
| d = pickle.dumps(it, proto) | |
| it = pickle.loads(d) | |
| del data[drop] | |
| self.assertEqual(list(it), list(data)) | |
| def test_itemiterator_pickling(self): | |
| for proto in range(pickle.HIGHEST_PROTOCOL + 1): | |
| data = {1:"a", 2:"b", 3:"c"} | |
| # dictviews aren't picklable, only their iterators | |
| itorg = iter(data.items()) | |
| d = pickle.dumps(itorg, proto) | |
| it = pickle.loads(d) | |
| # note that the type of the unpickled iterator | |
| # is not necessarily the same as the original. It is | |
| # merely an object supporting the iterator protocol, yielding | |
| # the same objects as the original one. | |
| # self.assertEqual(type(itorg), type(it)) | |
| self.assertIsInstance(it, collections.abc.Iterator) | |
| self.assertEqual(dict(it), data) | |
| it = pickle.loads(d) | |
| drop = next(it) | |
| d = pickle.dumps(it, proto) | |
| it = pickle.loads(d) | |
| del data[drop[0]] | |
| self.assertEqual(dict(it), data) | |
| def test_valuesiterator_pickling(self): | |
| for proto in range(pickle.HIGHEST_PROTOCOL + 1): | |
| data = {1:"a", 2:"b", 3:"c"} | |
| # data.values() isn't picklable, only its iterator | |
| it = iter(data.values()) | |
| d = pickle.dumps(it, proto) | |
| it = pickle.loads(d) | |
| self.assertEqual(list(it), list(data.values())) | |
| it = pickle.loads(d) | |
| drop = next(it) | |
| d = pickle.dumps(it, proto) | |
| it = pickle.loads(d) | |
| values = list(it) + [drop] | |
| self.assertEqual(sorted(values), sorted(list(data.values()))) | |
| def test_reverseiterator_pickling(self): | |
| for proto in range(pickle.HIGHEST_PROTOCOL + 1): | |
| data = {1:"a", 2:"b", 3:"c"} | |
| it = reversed(data) | |
| d = pickle.dumps(it, proto) | |
| it = pickle.loads(d) | |
| self.assertEqual(list(it), list(reversed(data))) | |
| it = pickle.loads(d) | |
| try: | |
| drop = next(it) | |
| except StopIteration: | |
| continue | |
| d = pickle.dumps(it, proto) | |
| it = pickle.loads(d) | |
| del data[drop] | |
| self.assertEqual(list(it), list(reversed(data))) | |
| def test_reverseitemiterator_pickling(self): | |
| for proto in range(pickle.HIGHEST_PROTOCOL + 1): | |
| data = {1:"a", 2:"b", 3:"c"} | |
| # dictviews aren't picklable, only their iterators | |
| itorg = reversed(data.items()) | |
| d = pickle.dumps(itorg, proto) | |
| it = pickle.loads(d) | |
| # note that the type of the unpickled iterator | |
| # is not necessarily the same as the original. It is | |
| # merely an object supporting the iterator protocol, yielding | |
| # the same objects as the original one. | |
| # self.assertEqual(type(itorg), type(it)) | |
| self.assertIsInstance(it, collections.abc.Iterator) | |
| self.assertEqual(dict(it), data) | |
| it = pickle.loads(d) | |
| drop = next(it) | |
| d = pickle.dumps(it, proto) | |
| it = pickle.loads(d) | |
| del data[drop[0]] | |
| self.assertEqual(dict(it), data) | |
| def test_reversevaluesiterator_pickling(self): | |
| for proto in range(pickle.HIGHEST_PROTOCOL + 1): | |
| data = {1:"a", 2:"b", 3:"c"} | |
| # data.values() isn't picklable, only its iterator | |
| it = reversed(data.values()) | |
| d = pickle.dumps(it, proto) | |
| it = pickle.loads(d) | |
| self.assertEqual(list(it), list(reversed(data.values()))) | |
| it = pickle.loads(d) | |
| drop = next(it) | |
| d = pickle.dumps(it, proto) | |
| it = pickle.loads(d) | |
| values = list(it) + [drop] | |
| self.assertEqual(sorted(values), sorted(data.values())) | |
| def test_instance_dict_getattr_str_subclass(self): | |
| class Foo: | |
| def __init__(self, msg): | |
| self.msg = msg | |
| f = Foo('123') | |
| class _str(str): | |
| pass | |
| self.assertEqual(f.msg, getattr(f, _str('msg'))) | |
| self.assertEqual(f.msg, f.__dict__[_str('msg')]) | |
| def test_object_set_item_single_instance_non_str_key(self): | |
| class Foo: pass | |
| f = Foo() | |
| f.__dict__[1] = 1 | |
| f.a = 'a' | |
| self.assertEqual(f.__dict__, {1:1, 'a':'a'}) | |
| def check_reentrant_insertion(self, mutate): | |
| # This object will trigger mutation of the dict when replaced | |
| # by another value. Note this relies on refcounting: the test | |
| # won't achieve its purpose on fully-GCed Python implementations. | |
| class Mutating: | |
| def __del__(self): | |
| mutate(d) | |
| d = {k: Mutating() for k in 'abcdefghijklmnopqr'} | |
| for k in list(d): | |
| d[k] = k | |
| def test_reentrant_insertion(self): | |
| # Reentrant insertion shouldn't crash (see issue #22653) | |
| def mutate(d): | |
| d['b'] = 5 | |
| self.check_reentrant_insertion(mutate) | |
| def mutate(d): | |
| d.update(self.__dict__) | |
| d.clear() | |
| self.check_reentrant_insertion(mutate) | |
| def mutate(d): | |
| while d: | |
| d.popitem() | |
| self.check_reentrant_insertion(mutate) | |
| def test_merge_and_mutate(self): | |
| class X: | |
| def __hash__(self): | |
| return 0 | |
| def __eq__(self, o): | |
| other.clear() | |
| return False | |
| l = [(i,0) for i in range(1, 1337)] | |
| other = dict(l) | |
| other[X()] = 0 | |
| d = {X(): 0, 1: 1} | |
| self.assertRaises(RuntimeError, d.update, other) | |
| def test_free_after_iterating(self): | |
| support.check_free_after_iterating(self, iter, dict) | |
| support.check_free_after_iterating(self, lambda d: iter(d.keys()), dict) | |
| support.check_free_after_iterating(self, lambda d: iter(d.values()), dict) | |
| support.check_free_after_iterating(self, lambda d: iter(d.items()), dict) | |
| def test_equal_operator_modifying_operand(self): | |
| # test fix for seg fault reported in bpo-27945 part 3. | |
| class X(): | |
| def __del__(self): | |
| dict_b.clear() | |
| def __eq__(self, other): | |
| dict_a.clear() | |
| return True | |
| def __hash__(self): | |
| return 13 | |
| dict_a = {X(): 0} | |
| dict_b = {X(): X()} | |
| self.assertTrue(dict_a == dict_b) | |
| # test fix for seg fault reported in bpo-38588 part 1. | |
| class Y: | |
| def __eq__(self, other): | |
| dict_d.clear() | |
| return True | |
| dict_c = {0: Y()} | |
| dict_d = {0: set()} | |
| self.assertTrue(dict_c == dict_d) | |
| def test_fromkeys_operator_modifying_dict_operand(self): | |
| # test fix for seg fault reported in issue 27945 part 4a. | |
| class X(int): | |
| def __hash__(self): | |
| return 13 | |
| def __eq__(self, other): | |
| if len(d) > 1: | |
| d.clear() | |
| return False | |
| d = {} # this is required to exist so that d can be constructed! | |
| d = {X(1): 1, X(2): 2} | |
| try: | |
| dict.fromkeys(d) # shouldn't crash | |
| except RuntimeError: # implementation defined | |
| pass | |
| def test_fromkeys_operator_modifying_set_operand(self): | |
| # test fix for seg fault reported in issue 27945 part 4b. | |
| class X(int): | |
| def __hash__(self): | |
| return 13 | |
| def __eq__(self, other): | |
| if len(d) > 1: | |
| d.clear() | |
| return False | |
| d = {} # this is required to exist so that d can be constructed! | |
| d = {X(1), X(2)} | |
| try: | |
| dict.fromkeys(d) # shouldn't crash | |
| except RuntimeError: # implementation defined | |
| pass | |
| def test_dictitems_contains_use_after_free(self): | |
| class X: | |
| def __eq__(self, other): | |
| d.clear() | |
| return NotImplemented | |
| d = {0: set()} | |
| (0, X()) in d.items() | |
| def test_dict_contain_use_after_free(self): | |
| # bpo-40489 | |
| class S(str): | |
| def __eq__(self, other): | |
| d.clear() | |
| return NotImplemented | |
| def __hash__(self): | |
| return hash('test') | |
| d = {S(): 'value'} | |
| self.assertFalse('test' in d) | |
| def test_init_use_after_free(self): | |
| class X: | |
| def __hash__(self): | |
| pair[:] = [] | |
| return 13 | |
| pair = [X(), 123] | |
| dict([pair]) | |
| def test_oob_indexing_dictiter_iternextitem(self): | |
| class X(int): | |
| def __del__(self): | |
| d.clear() | |
| d = {i: X(i) for i in range(8)} | |
| def iter_and_mutate(): | |
| for result in d.items(): | |
| if result[0] == 2: | |
| d[2] = None # free d[2] --> X(2).__del__ was called | |
| self.assertRaises(RuntimeError, iter_and_mutate) | |
| def test_reversed(self): | |
| d = {"a": 1, "b": 2, "foo": 0, "c": 3, "d": 4} | |
| del d["foo"] | |
| r = reversed(d) | |
| self.assertEqual(list(r), list('dcba')) | |
| self.assertRaises(StopIteration, next, r) | |
| def test_reverse_iterator_for_empty_dict(self): | |
| # bpo-38525: reversed iterator should work properly | |
| # empty dict is directly used for reference count test | |
| self.assertEqual(list(reversed({})), []) | |
| self.assertEqual(list(reversed({}.items())), []) | |
| self.assertEqual(list(reversed({}.values())), []) | |
| self.assertEqual(list(reversed({}.keys())), []) | |
| # dict() and {} don't trigger the same code path | |
| self.assertEqual(list(reversed(dict())), []) | |
| self.assertEqual(list(reversed(dict().items())), []) | |
| self.assertEqual(list(reversed(dict().values())), []) | |
| self.assertEqual(list(reversed(dict().keys())), []) | |
| def test_reverse_iterator_for_shared_shared_dicts(self): | |
| class A: | |
| def __init__(self, x, y): | |
| if x: self.x = x | |
| if y: self.y = y | |
| self.assertEqual(list(reversed(A(1, 2).__dict__)), ['y', 'x']) | |
| self.assertEqual(list(reversed(A(1, 0).__dict__)), ['x']) | |
| self.assertEqual(list(reversed(A(0, 1).__dict__)), ['y']) | |
| def test_dict_copy_order(self): | |
| # bpo-34320 | |
| od = collections.OrderedDict([('a', 1), ('b', 2)]) | |
| od.move_to_end('a') | |
| expected = list(od.items()) | |
| copy = dict(od) | |
| self.assertEqual(list(copy.items()), expected) | |
| # dict subclass doesn't override __iter__ | |
| class CustomDict(dict): | |
| pass | |
| pairs = [('a', 1), ('b', 2), ('c', 3)] | |
| d = CustomDict(pairs) | |
| self.assertEqual(pairs, list(dict(d).items())) | |
| class CustomReversedDict(dict): | |
| def keys(self): | |
| return reversed(list(dict.keys(self))) | |
| __iter__ = keys | |
| def items(self): | |
| return reversed(dict.items(self)) | |
| d = CustomReversedDict(pairs) | |
| self.assertEqual(pairs[::-1], list(dict(d).items())) | |
| @support.cpython_only | |
| def test_dict_items_result_gc(self): | |
| # bpo-42536: dict.items's tuple-reuse speed trick breaks the GC's | |
| # assumptions about what can be untracked. Make sure we re-track result | |
| # tuples whenever we reuse them. | |
| it = iter({None: []}.items()) | |
| gc.collect() | |
| # That GC collection probably untracked the recycled internal result | |
| # tuple, which is initialized to (None, None). Make sure it's re-tracked | |
| # when it's mutated and returned from __next__: | |
| self.assertTrue(gc.is_tracked(next(it))) | |
| @support.cpython_only | |
| def test_dict_items_result_gc_reversed(self): | |
| # Same as test_dict_items_result_gc above, but reversed. | |
| it = reversed({None: []}.items()) | |
| gc.collect() | |
| self.assertTrue(gc.is_tracked(next(it))) | |
| def test_str_nonstr(self): | |
| # cpython uses a different lookup function if the dict only contains | |
| # `str` keys. Make sure the unoptimized path is used when a non-`str` | |
| # key appears. | |
| class StrSub(str): | |
| pass | |
| eq_count = 0 | |
| # This class compares equal to the string 'key3' | |
| class Key3: | |
| def __hash__(self): | |
| return hash('key3') | |
| def __eq__(self, other): | |
| nonlocal eq_count | |
| if isinstance(other, Key3) or isinstance(other, str) and other == 'key3': | |
| eq_count += 1 | |
| return True | |
| return False | |
| key3_1 = StrSub('key3') | |
| key3_2 = Key3() | |
| key3_3 = Key3() | |
| dicts = [] | |
| # Create dicts of the form `{'key1': 42, 'key2': 43, key3: 44}` in a | |
| # bunch of different ways. In all cases, `key3` is not of type `str`. | |
| # `key3_1` is a `str` subclass and `key3_2` is a completely unrelated | |
| # type. | |
| for key3 in (key3_1, key3_2): | |
| # A literal | |
| dicts.append({'key1': 42, 'key2': 43, key3: 44}) | |
| # key3 inserted via `dict.__setitem__` | |
| d = {'key1': 42, 'key2': 43} | |
| d[key3] = 44 | |
| dicts.append(d) | |
| # key3 inserted via `dict.setdefault` | |
| d = {'key1': 42, 'key2': 43} | |
| self.assertEqual(d.setdefault(key3, 44), 44) | |
| dicts.append(d) | |
| # key3 inserted via `dict.update` | |
| d = {'key1': 42, 'key2': 43} | |
| d.update({key3: 44}) | |
| dicts.append(d) | |
| # key3 inserted via `dict.__ior__` | |
| d = {'key1': 42, 'key2': 43} | |
| d |= {key3: 44} | |
| dicts.append(d) | |
| # `dict(iterable)` | |
| def make_pairs(): | |
| yield ('key1', 42) | |
| yield ('key2', 43) | |
| yield (key3, 44) | |
| d = dict(make_pairs()) | |
| dicts.append(d) | |
| # `dict.copy` | |
| d = d.copy() | |
| dicts.append(d) | |
| # dict comprehension | |
| d = {key: 42 + i for i,key in enumerate(['key1', 'key2', key3])} | |
| dicts.append(d) | |
| for d in dicts: | |
| with self.subTest(d=d): | |
| self.assertEqual(d.get('key1'), 42) | |
| # Try to make an object that is of type `str` and is equal to | |
| # `'key1'`, but (at least on cpython) is a different object. | |
| noninterned_key1 = 'ke' | |
| noninterned_key1 += 'y1' | |
| if support.check_impl_detail(cpython=True): | |
| # suppress a SyntaxWarning | |
| interned_key1 = 'key1' | |
| self.assertFalse(noninterned_key1 is interned_key1) | |
| self.assertEqual(d.get(noninterned_key1), 42) | |
| self.assertEqual(d.get('key3'), 44) | |
| self.assertEqual(d.get(key3_1), 44) | |
| self.assertEqual(d.get(key3_2), 44) | |
| # `key3_3` itself is definitely not a dict key, so make sure | |
| # that `__eq__` gets called. | |
| # | |
| # Note that this might not hold for `key3_1` and `key3_2` | |
| # because they might be the same object as one of the dict keys, | |
| # in which case implementations are allowed to skip the call to | |
| # `__eq__`. | |
| eq_count = 0 | |
| self.assertEqual(d.get(key3_3), 44) | |
| self.assertGreaterEqual(eq_count, 1) | |
| class CAPITest(unittest.TestCase): | |
| # Test _PyDict_GetItem_KnownHash() | |
| @support.cpython_only | |
| def test_getitem_knownhash(self): | |
| from _testcapi import dict_getitem_knownhash | |
| d = {'x': 1, 'y': 2, 'z': 3} | |
| self.assertEqual(dict_getitem_knownhash(d, 'x', hash('x')), 1) | |
| self.assertEqual(dict_getitem_knownhash(d, 'y', hash('y')), 2) | |
| self.assertEqual(dict_getitem_knownhash(d, 'z', hash('z')), 3) | |
| # not a dict | |
| self.assertRaises(SystemError, dict_getitem_knownhash, [], 1, hash(1)) | |
| # key does not exist | |
| self.assertRaises(KeyError, dict_getitem_knownhash, {}, 1, hash(1)) | |
| class Exc(Exception): pass | |
| class BadEq: | |
| def __eq__(self, other): | |
| raise Exc | |
| def __hash__(self): | |
| return 7 | |
| k1, k2 = BadEq(), BadEq() | |
| d = {k1: 1} | |
| self.assertEqual(dict_getitem_knownhash(d, k1, hash(k1)), 1) | |
| self.assertRaises(Exc, dict_getitem_knownhash, d, k2, hash(k2)) | |
| from test import mapping_tests | |
| class GeneralMappingTests(mapping_tests.BasicTestMappingProtocol): | |
| type2test = dict | |
| class Dict(dict): | |
| pass | |
| class SubclassMappingTests(mapping_tests.BasicTestMappingProtocol): | |
| type2test = Dict | |
| if __name__ == "__main__": | |
| unittest.main() |