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youknowdot
7c9a0e32b3
Extract attrgetter, itemgetter and methodcaller GC traversal from #8954. Add four bounded reference-cycle cases to the existing operator snippet, including a non-dotted str subclass retained by attrgetter. Assisted-by: OpenAI Codex:model identifier unavailable
34 lines
872 B
Python
34 lines
872 B
Python
import _operator
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assert _operator._compare_digest("abcdef", "abcdef")
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assert not _operator._compare_digest("abcdef", "abc")
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assert not _operator._compare_digest("abc", "abcdef")
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def check_operator_reference_cycles():
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import gc
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import weakref
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class Holder:
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pass
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class Name(str):
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pass
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for make, make_payload in (
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(_operator.itemgetter, Holder),
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(lambda value: _operator.methodcaller("method", value), Holder),
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(lambda value: _operator.methodcaller("method", value=value), Holder),
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(_operator.attrgetter, lambda: Name("attribute")),
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):
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payload = make_payload()
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wrapper = make(payload)
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payload.wrapper = wrapper
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reference = weakref.ref(payload)
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del wrapper, payload
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gc.collect()
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assert reference() is None
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check_operator_reference_cycles()
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