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* Initial plan * Add __callback__ property to PyWeak for weakref compatibility Add get_callback() method to PyWeak in core.rs that safely reads the callback field under the stripe lock. Expose it as a read-only __callback__ property on the weakref type, matching CPython behavior: - Returns the callback function when one was provided and referent is alive - Returns None when no callback was provided - Returns None after the referent has been collected - Raises AttributeError on assignment (read-only) Remove @unittest.expectedFailure from test_callback_attribute and test_callback_attribute_after_deletion in test_weakref.py. Add regression tests to extra_tests/snippets/stdlib_weakref.py. Agent-Logs-Url: https://github.com/RustPython/RustPython/sessions/a8689daa-4476-4645-a935-0e13c7f7bb42 Co-authored-by: youknowone <69878+youknowone@users.noreply.github.com> * Fix ruff formatting in stdlib_weakref.py snippet Agent-Logs-Url: https://github.com/RustPython/RustPython/sessions/4995198f-e083-4dac-823a-166fcf54adc4 Co-authored-by: youknowone <69878+youknowone@users.noreply.github.com> --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: youknowone <69878+youknowone@users.noreply.github.com>
54 lines
945 B
Python
54 lines
945 B
Python
from _weakref import proxy, ref
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from testutils import assert_raises
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class X:
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pass
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a = X()
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b = ref(a)
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assert callable(b)
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assert b() is a
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# Test __callback__ property
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assert b.__callback__ is None, (
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"weakref without callback should have __callback__ == None"
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)
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callback = lambda r: None
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c = ref(a, callback)
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assert c.__callback__ is callback, "weakref with callback should return the callback"
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# Test __callback__ is read-only
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try:
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c.__callback__ = lambda r: None
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assert False, "Setting __callback__ should raise AttributeError"
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except AttributeError:
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pass
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# Test __callback__ after referent deletion
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x = X()
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cb = lambda r: None
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w = ref(x, cb)
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assert w.__callback__ is cb
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del x
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assert w.__callback__ is None, "__callback__ should be None after referent is collected"
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class G:
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def __init__(self, h):
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self.h = h
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g = G(5)
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p = proxy(g)
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assert p.h == 5
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del g
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assert_raises(ReferenceError, lambda: p.h)
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