mirror of https://github.com/python/cpython
1625 lines
51 KiB
Python
1625 lines
51 KiB
Python
import collections
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import collections.abc
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import gc
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import pickle
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import random
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import string
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import sys
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import unittest
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import weakref
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from test import support
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from test.support import import_helper, get_c_recursion_limit
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class DictTest(unittest.TestCase):
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def test_invalid_keyword_arguments(self):
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class Custom(dict):
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pass
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for invalid in {1 : 2}, Custom({1 : 2}):
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with self.assertRaises(TypeError):
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dict(**invalid)
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with self.assertRaises(TypeError):
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{}.update(**invalid)
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def test_constructor(self):
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# calling built-in types without argument must return empty
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self.assertEqual(dict(), {})
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self.assertIsNot(dict(), {})
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def test_literal_constructor(self):
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# check literal constructor for different sized dicts
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# (to exercise the BUILD_MAP oparg).
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for n in (0, 1, 6, 256, 400):
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items = [(''.join(random.sample(string.ascii_letters, 8)), i)
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for i in range(n)]
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random.shuffle(items)
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formatted_items = ('{!r}: {:d}'.format(k, v) for k, v in items)
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dictliteral = '{' + ', '.join(formatted_items) + '}'
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self.assertEqual(eval(dictliteral), dict(items))
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def test_merge_operator(self):
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a = {0: 0, 1: 1, 2: 1}
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b = {1: 1, 2: 2, 3: 3}
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c = a.copy()
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c |= b
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self.assertEqual(a | b, {0: 0, 1: 1, 2: 2, 3: 3})
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self.assertEqual(c, {0: 0, 1: 1, 2: 2, 3: 3})
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c = b.copy()
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c |= a
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self.assertEqual(b | a, {1: 1, 2: 1, 3: 3, 0: 0})
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self.assertEqual(c, {1: 1, 2: 1, 3: 3, 0: 0})
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c = a.copy()
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c |= [(1, 1), (2, 2), (3, 3)]
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self.assertEqual(c, {0: 0, 1: 1, 2: 2, 3: 3})
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self.assertIs(a.__or__(None), NotImplemented)
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self.assertIs(a.__or__(()), NotImplemented)
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self.assertIs(a.__or__("BAD"), NotImplemented)
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self.assertIs(a.__or__(""), NotImplemented)
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self.assertRaises(TypeError, a.__ior__, None)
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self.assertEqual(a.__ior__(()), {0: 0, 1: 1, 2: 1})
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self.assertRaises(ValueError, a.__ior__, "BAD")
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self.assertEqual(a.__ior__(""), {0: 0, 1: 1, 2: 1})
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def test_bool(self):
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self.assertIs(not {}, True)
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self.assertTrue({1: 2})
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self.assertIs(bool({}), False)
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self.assertIs(bool({1: 2}), True)
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def test_keys(self):
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d = {}
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self.assertEqual(set(d.keys()), set())
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d = {'a': 1, 'b': 2}
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k = d.keys()
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self.assertEqual(set(k), {'a', 'b'})
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self.assertIn('a', k)
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self.assertIn('b', k)
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self.assertIn('a', d)
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self.assertIn('b', d)
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self.assertRaises(TypeError, d.keys, None)
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self.assertEqual(repr(dict(a=1).keys()), "dict_keys(['a'])")
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def test_values(self):
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d = {}
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self.assertEqual(set(d.values()), set())
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d = {1:2}
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self.assertEqual(set(d.values()), {2})
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self.assertRaises(TypeError, d.values, None)
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self.assertEqual(repr(dict(a=1).values()), "dict_values([1])")
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def test_items(self):
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d = {}
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self.assertEqual(set(d.items()), set())
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d = {1:2}
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self.assertEqual(set(d.items()), {(1, 2)})
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self.assertRaises(TypeError, d.items, None)
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self.assertEqual(repr(dict(a=1).items()), "dict_items([('a', 1)])")
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def test_views_mapping(self):
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mappingproxy = type(type.__dict__)
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class Dict(dict):
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pass
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for cls in [dict, Dict]:
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d = cls()
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m1 = d.keys().mapping
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m2 = d.values().mapping
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m3 = d.items().mapping
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for m in [m1, m2, m3]:
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self.assertIsInstance(m, mappingproxy)
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self.assertEqual(m, d)
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d["foo"] = "bar"
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for m in [m1, m2, m3]:
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self.assertIsInstance(m, mappingproxy)
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self.assertEqual(m, d)
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def test_contains(self):
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d = {}
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self.assertNotIn('a', d)
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self.assertFalse('a' in d)
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self.assertTrue('a' not in d)
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d = {'a': 1, 'b': 2}
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self.assertIn('a', d)
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self.assertIn('b', d)
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self.assertNotIn('c', d)
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self.assertRaises(TypeError, d.__contains__)
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def test_len(self):
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d = {}
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self.assertEqual(len(d), 0)
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d = {'a': 1, 'b': 2}
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self.assertEqual(len(d), 2)
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def test_getitem(self):
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d = {'a': 1, 'b': 2}
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self.assertEqual(d['a'], 1)
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self.assertEqual(d['b'], 2)
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d['c'] = 3
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d['a'] = 4
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self.assertEqual(d['c'], 3)
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self.assertEqual(d['a'], 4)
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del d['b']
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self.assertEqual(d, {'a': 4, 'c': 3})
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self.assertRaises(TypeError, d.__getitem__)
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class BadEq(object):
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def __eq__(self, other):
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raise Exc()
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def __hash__(self):
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return 24
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d = {}
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d[BadEq()] = 42
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self.assertRaises(KeyError, d.__getitem__, 23)
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class Exc(Exception): pass
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class BadHash(object):
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fail = False
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def __hash__(self):
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if self.fail:
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raise Exc()
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else:
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return 42
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x = BadHash()
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d[x] = 42
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x.fail = True
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self.assertRaises(Exc, d.__getitem__, x)
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def test_clear(self):
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d = {1:1, 2:2, 3:3}
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d.clear()
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self.assertEqual(d, {})
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self.assertRaises(TypeError, d.clear, None)
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def test_update(self):
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d = {}
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d.update({1:100})
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d.update({2:20})
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d.update({1:1, 2:2, 3:3})
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self.assertEqual(d, {1:1, 2:2, 3:3})
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d.update()
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self.assertEqual(d, {1:1, 2:2, 3:3})
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self.assertRaises((TypeError, AttributeError), d.update, None)
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class SimpleUserDict:
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def __init__(self):
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self.d = {1:1, 2:2, 3:3}
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def keys(self):
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return self.d.keys()
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def __getitem__(self, i):
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return self.d[i]
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d.clear()
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d.update(SimpleUserDict())
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self.assertEqual(d, {1:1, 2:2, 3:3})
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class Exc(Exception): pass
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d.clear()
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class FailingUserDict:
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def keys(self):
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raise Exc
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self.assertRaises(Exc, d.update, FailingUserDict())
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class FailingUserDict:
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def keys(self):
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class BogonIter:
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def __init__(self):
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self.i = 1
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def __iter__(self):
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return self
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def __next__(self):
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if self.i:
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self.i = 0
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return 'a'
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raise Exc
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return BogonIter()
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def __getitem__(self, key):
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return key
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self.assertRaises(Exc, d.update, FailingUserDict())
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class FailingUserDict:
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def keys(self):
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class BogonIter:
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def __init__(self):
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self.i = ord('a')
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def __iter__(self):
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return self
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def __next__(self):
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if self.i <= ord('z'):
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rtn = chr(self.i)
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self.i += 1
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return rtn
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raise StopIteration
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return BogonIter()
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def __getitem__(self, key):
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raise Exc
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self.assertRaises(Exc, d.update, FailingUserDict())
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class badseq(object):
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def __iter__(self):
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return self
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def __next__(self):
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raise Exc()
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self.assertRaises(Exc, {}.update, badseq())
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self.assertRaises(ValueError, {}.update, [(1, 2, 3)])
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def test_fromkeys(self):
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self.assertEqual(dict.fromkeys('abc'), {'a':None, 'b':None, 'c':None})
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d = {}
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self.assertIsNot(d.fromkeys('abc'), d)
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self.assertEqual(d.fromkeys('abc'), {'a':None, 'b':None, 'c':None})
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self.assertEqual(d.fromkeys((4,5),0), {4:0, 5:0})
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self.assertEqual(d.fromkeys([]), {})
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def g():
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yield 1
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self.assertEqual(d.fromkeys(g()), {1:None})
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self.assertRaises(TypeError, {}.fromkeys, 3)
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class dictlike(dict): pass
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self.assertEqual(dictlike.fromkeys('a'), {'a':None})
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self.assertEqual(dictlike().fromkeys('a'), {'a':None})
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self.assertIsInstance(dictlike.fromkeys('a'), dictlike)
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self.assertIsInstance(dictlike().fromkeys('a'), dictlike)
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class mydict(dict):
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def __new__(cls):
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return collections.UserDict()
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ud = mydict.fromkeys('ab')
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self.assertEqual(ud, {'a':None, 'b':None})
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self.assertIsInstance(ud, collections.UserDict)
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self.assertRaises(TypeError, dict.fromkeys)
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class Exc(Exception): pass
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class baddict1(dict):
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def __init__(self):
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raise Exc()
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self.assertRaises(Exc, baddict1.fromkeys, [1])
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class BadSeq(object):
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def __iter__(self):
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return self
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def __next__(self):
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raise Exc()
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self.assertRaises(Exc, dict.fromkeys, BadSeq())
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class baddict2(dict):
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def __setitem__(self, key, value):
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raise Exc()
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self.assertRaises(Exc, baddict2.fromkeys, [1])
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# test fast path for dictionary inputs
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d = dict(zip(range(6), range(6)))
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self.assertEqual(dict.fromkeys(d, 0), dict(zip(range(6), [0]*6)))
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class baddict3(dict):
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def __new__(cls):
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return d
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d = {i : i for i in range(10)}
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res = d.copy()
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res.update(a=None, b=None, c=None)
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self.assertEqual(baddict3.fromkeys({"a", "b", "c"}), res)
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def test_copy(self):
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d = {1: 1, 2: 2, 3: 3}
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self.assertIsNot(d.copy(), d)
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self.assertEqual(d.copy(), d)
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self.assertEqual(d.copy(), {1: 1, 2: 2, 3: 3})
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copy = d.copy()
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d[4] = 4
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self.assertNotEqual(copy, d)
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self.assertEqual({}.copy(), {})
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self.assertRaises(TypeError, d.copy, None)
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def test_copy_fuzz(self):
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for dict_size in [10, 100, 1000, 10000, 100000]:
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dict_size = random.randrange(
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dict_size // 2, dict_size + dict_size // 2)
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with self.subTest(dict_size=dict_size):
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d = {}
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for i in range(dict_size):
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d[i] = i
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d2 = d.copy()
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self.assertIsNot(d2, d)
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self.assertEqual(d, d2)
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d2['key'] = 'value'
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self.assertNotEqual(d, d2)
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self.assertEqual(len(d2), len(d) + 1)
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def test_copy_maintains_tracking(self):
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class A:
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pass
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key = A()
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for d in ({}, {'a': 1}, {key: 'val'}):
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d2 = d.copy()
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self.assertEqual(gc.is_tracked(d), gc.is_tracked(d2))
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def test_copy_noncompact(self):
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# Dicts don't compact themselves on del/pop operations.
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# Copy will use a slow merging strategy that produces
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# a compacted copy when roughly 33% of dict is a non-used
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# keys-space (to optimize memory footprint).
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# In this test we want to hit the slow/compacting
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# branch of dict.copy() and make sure it works OK.
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d = {k: k for k in range(1000)}
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for k in range(950):
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del d[k]
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d2 = d.copy()
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self.assertEqual(d2, d)
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def test_get(self):
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d = {}
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self.assertIs(d.get('c'), None)
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self.assertEqual(d.get('c', 3), 3)
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d = {'a': 1, 'b': 2}
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self.assertIs(d.get('c'), None)
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self.assertEqual(d.get('c', 3), 3)
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self.assertEqual(d.get('a'), 1)
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self.assertEqual(d.get('a', 3), 1)
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self.assertRaises(TypeError, d.get)
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self.assertRaises(TypeError, d.get, None, None, None)
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def test_setdefault(self):
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# dict.setdefault()
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d = {}
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self.assertIs(d.setdefault('key0'), None)
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d.setdefault('key0', [])
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self.assertIs(d.setdefault('key0'), None)
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d.setdefault('key', []).append(3)
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self.assertEqual(d['key'][0], 3)
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d.setdefault('key', []).append(4)
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self.assertEqual(len(d['key']), 2)
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self.assertRaises(TypeError, d.setdefault)
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class Exc(Exception): pass
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class BadHash(object):
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fail = False
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def __hash__(self):
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if self.fail:
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raise Exc()
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else:
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return 42
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x = BadHash()
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d[x] = 42
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x.fail = True
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self.assertRaises(Exc, d.setdefault, x, [])
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def test_setdefault_atomic(self):
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# Issue #13521: setdefault() calls __hash__ and __eq__ only once.
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class Hashed(object):
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def __init__(self):
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self.hash_count = 0
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self.eq_count = 0
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def __hash__(self):
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self.hash_count += 1
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return 42
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def __eq__(self, other):
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self.eq_count += 1
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return id(self) == id(other)
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hashed1 = Hashed()
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y = {hashed1: 5}
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hashed2 = Hashed()
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y.setdefault(hashed2, [])
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self.assertEqual(hashed1.hash_count, 1)
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self.assertEqual(hashed2.hash_count, 1)
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self.assertEqual(hashed1.eq_count + hashed2.eq_count, 1)
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def test_setitem_atomic_at_resize(self):
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class Hashed(object):
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def __init__(self):
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self.hash_count = 0
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self.eq_count = 0
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def __hash__(self):
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self.hash_count += 1
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return 42
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def __eq__(self, other):
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self.eq_count += 1
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return id(self) == id(other)
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hashed1 = Hashed()
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# 5 items
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y = {hashed1: 5, 0: 0, 1: 1, 2: 2, 3: 3}
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hashed2 = Hashed()
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# 6th item forces a resize
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y[hashed2] = []
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self.assertEqual(hashed1.hash_count, 1)
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self.assertEqual(hashed2.hash_count, 1)
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self.assertEqual(hashed1.eq_count + hashed2.eq_count, 1)
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def test_popitem(self):
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# dict.popitem()
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for copymode in -1, +1:
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# -1: b has same structure as a
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# +1: b is a.copy()
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for log2size in range(12):
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size = 2**log2size
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a = {}
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b = {}
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for i in range(size):
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a[repr(i)] = i
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if copymode < 0:
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b[repr(i)] = i
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if copymode > 0:
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b = a.copy()
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for i in range(size):
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ka, va = ta = a.popitem()
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self.assertEqual(va, int(ka))
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kb, vb = tb = b.popitem()
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self.assertEqual(vb, int(kb))
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self.assertFalse(copymode < 0 and ta != tb)
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self.assertFalse(a)
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self.assertFalse(b)
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d = {}
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self.assertRaises(KeyError, d.popitem)
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def test_pop(self):
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# Tests for pop with specified key
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d = {}
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k, v = 'abc', 'def'
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d[k] = v
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self.assertRaises(KeyError, d.pop, 'ghi')
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self.assertEqual(d.pop(k), v)
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self.assertEqual(len(d), 0)
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self.assertRaises(KeyError, d.pop, k)
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self.assertEqual(d.pop(k, v), v)
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d[k] = v
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self.assertEqual(d.pop(k, 1), v)
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self.assertRaises(TypeError, d.pop)
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class Exc(Exception): pass
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|
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class BadHash(object):
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fail = False
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def __hash__(self):
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if self.fail:
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raise Exc()
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else:
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return 42
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x = BadHash()
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d[x] = 42
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x.fail = True
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self.assertRaises(Exc, d.pop, x)
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def test_mutating_iteration(self):
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# changing dict size during iteration
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d = {}
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d[1] = 1
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|
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(get_c_recursion_limit() + 1):
|
|
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)
|
|
|
|
def test_string_keys_can_track_values(self):
|
|
# Test that this doesn't leak.
|
|
for i in range(10):
|
|
d = {}
|
|
for j in range(10):
|
|
d[str(j)] = j
|
|
d["foo"] = d
|
|
|
|
@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 keep correct insertion
|
|
order when attributes are adding using setdefault()"""
|
|
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.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.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):
|
|
a, b = self.make_shared_key_dict(2)
|
|
|
|
a.pop('y')
|
|
with self.assertRaises(KeyError):
|
|
a.pop('y')
|
|
|
|
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_update(self):
|
|
"""dict.update(other) must preserve order in other."""
|
|
class C:
|
|
def __init__(self, order):
|
|
if order:
|
|
self.a, self.b, self.c = 1, 2, 3
|
|
else:
|
|
self.c, self.b, self.a = 1, 2, 3
|
|
o = C(True)
|
|
o = C(False) # o.__dict__ has reversed order.
|
|
self.assertEqual(list(o.__dict__), ["c", "b", "a"])
|
|
|
|
d = {}
|
|
d.update(o.__dict__)
|
|
self.assertEqual(list(d), ["c", "b", "a"])
|
|
|
|
@support.cpython_only
|
|
def test_splittable_to_generic_combinedtable(self):
|
|
"""split table must be correctly resized and converted to generic combined table"""
|
|
class C:
|
|
pass
|
|
|
|
a = C()
|
|
a.x = 1
|
|
d = a.__dict__
|
|
before_resize = sys.getsizeof(d)
|
|
d[2] = 2 # split table is resized to a generic combined table
|
|
|
|
self.assertGreater(sys.getsizeof(d), before_resize)
|
|
self.assertEqual(list(d), ['x', 2])
|
|
|
|
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):
|
|
_testinternalcapi = import_helper.import_module('_testinternalcapi')
|
|
dict_getitem_knownhash = _testinternalcapi.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()
|