mirror of
https://github.com/RustPython/RustPython.git
synced 2026-10-29 03:04:38 +08:00
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
|
|
|
|
assert _operator._compare_digest("abcdef", "abcdef")
|
|
assert not _operator._compare_digest("abcdef", "abc")
|
|
assert not _operator._compare_digest("abc", "abcdef")
|
|
|
|
|
|
def check_operator_reference_cycles():
|
|
import gc
|
|
import weakref
|
|
|
|
class Holder:
|
|
pass
|
|
|
|
class Name(str):
|
|
pass
|
|
|
|
for make, make_payload in (
|
|
(_operator.itemgetter, Holder),
|
|
(lambda value: _operator.methodcaller("method", value), Holder),
|
|
(lambda value: _operator.methodcaller("method", value=value), Holder),
|
|
(_operator.attrgetter, lambda: Name("attribute")),
|
|
):
|
|
payload = make_payload()
|
|
wrapper = make(payload)
|
|
payload.wrapper = wrapper
|
|
reference = weakref.ref(payload)
|
|
del wrapper, payload
|
|
gc.collect()
|
|
assert reference() is None
|
|
|
|
|
|
check_operator_reference_cycles()
|