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v0.5.1
https://github.com/python/cpython
Revision 049039832da3d02592d680cebf71ab8a665a6564 authored by Antoine Pitrou on 10 June 2020, 20:37:21 UTC, committed by GitHub on 10 June 2020, 20:37:21 UTC


The doccumentation at https://docs.python.org/3.10/library/weakref.html cautions that the `WeakKeyDictionary` and `WeakValueDictionary` are susceptible to the problem of dictionary mutation during iteration.

These notes present the user with a problem that has no easy solution.

I dug into the implementation and found that fortunately, Antoine Pitrou already addressed this challenge (10 years ago!) by introducing an `_IterationGuard` context manager to the implementation, which delays mutation while an iteration is in progress.

I asked for confirmation and @pitrou agreed that these notes could be removed:
https://github.com/python/cpython/commit/c1baa601e2b558deb690edfdf334fceee3b03327GH-commitcomment-39514438.
(cherry picked from commit 1642c0ef750f96664a98cadb09301d492098d2fb)

Co-authored-by: Daniel Fortunov <asqui@users.noreply.github.com>

Automerge-Triggered-By: @pitrou
1 parent 4b378ac
History
Tip revision: 049039832da3d02592d680cebf71ab8a665a6564 authored by Antoine Pitrou on 10 June 2020, 20:37:21 UTC
[3.7] bpo-40895: Update weakref documentation to remove old warnings (GH-20687) (GH-20793)
Tip revision: 0490398
File Mode Size
NEWS.d
ACKS -rw-r--r-- 26.6 KB
HISTORY -rw-r--r-- 1.3 MB
Porting -rw-r--r-- 63 bytes
README -rw-r--r-- 1.4 KB
README.AIX -rw-r--r-- 4.7 KB
README.coverity -rw-r--r-- 845 bytes
README.valgrind -rw-r--r-- 4.5 KB
SpecialBuilds.txt -rw-r--r-- 9.7 KB
coverity_model.c -rw-r--r-- 4.1 KB
gdbinit -rw-r--r-- 4.7 KB
indent.pro -rw-r--r-- 557 bytes
python-config.in -rw-r--r-- 1.9 KB
python-config.sh.in -rw-r--r-- 2.7 KB
python-wing3.wpr -rw-r--r-- 555 bytes
python-wing4.wpr -rw-r--r-- 835 bytes
python-wing5.wpr -rw-r--r-- 835 bytes
python.man -rw-r--r-- 17.8 KB
python.pc.in -rw-r--r-- 293 bytes
svnmap.txt -rw-r--r-- 4.1 MB
valgrind-python.supp -rw-r--r-- 8.6 KB
vgrindefs -rw-r--r-- 500 bytes

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