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[utils] traverse_obj
: Allow iterables in traversal (#6902)
Authored by: Grub4K
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@ -2016,6 +2016,8 @@ def test_traverse_obj(self):
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msg='nested `...` queries should work')
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self.assertCountEqual(traverse_obj(_TEST_DATA, (..., ..., 'index')), range(4),
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msg='`...` query result should be flattened')
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self.assertEqual(traverse_obj(range(4), ...), list(range(4)),
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msg='`...` should accept iterables')
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# Test function as key
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self.assertEqual(traverse_obj(_TEST_DATA, lambda x, y: x == 'urls' and isinstance(y, list)),
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@ -2023,6 +2025,8 @@ def test_traverse_obj(self):
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msg='function as query key should perform a filter based on (key, value)')
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self.assertCountEqual(traverse_obj(_TEST_DATA, lambda _, x: isinstance(x[0], str)), {'str'},
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msg='exceptions in the query function should be catched')
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self.assertEqual(traverse_obj(range(4), lambda _, x: x % 2 == 0), [0, 2],
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msg='function key should accept iterables')
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if __debug__:
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with self.assertRaises(Exception, msg='Wrong function signature should raise in debug'):
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traverse_obj(_TEST_DATA, lambda a: ...)
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@ -5528,7 +5528,6 @@ def traverse_obj(
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If no `default` is given and the last path branches, a `list` of results
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is always returned. If a path ends on a `dict` that result will always be a `dict`.
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"""
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is_sequence = lambda x: isinstance(x, collections.abc.Sequence) and not isinstance(x, (str, bytes))
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casefold = lambda k: k.casefold() if isinstance(k, str) else k
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if isinstance(expected_type, type):
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@ -5564,7 +5563,7 @@ def apply_key(key, obj, is_last):
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branching = True
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if isinstance(obj, collections.abc.Mapping):
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result = obj.values()
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elif is_sequence(obj):
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elif isinstance(obj, collections.abc.Iterable) and not isinstance(obj, (str, bytes)):
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result = obj
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elif isinstance(obj, re.Match):
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result = obj.groups()
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@ -5578,7 +5577,7 @@ def apply_key(key, obj, is_last):
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branching = True
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if isinstance(obj, collections.abc.Mapping):
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iter_obj = obj.items()
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elif is_sequence(obj):
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elif isinstance(obj, collections.abc.Iterable) and not isinstance(obj, (str, bytes)):
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iter_obj = enumerate(obj)
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elif isinstance(obj, re.Match):
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iter_obj = itertools.chain(
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@ -5614,7 +5613,7 @@ def apply_key(key, obj, is_last):
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result = next((v for k, v in obj.groupdict().items() if casefold(k) == key), None)
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elif isinstance(key, (int, slice)):
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if is_sequence(obj):
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if isinstance(obj, collections.abc.Sequence) and not isinstance(obj, (str, bytes)):
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branching = isinstance(key, slice)
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with contextlib.suppress(IndexError):
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result = obj[key]
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