New submission from kxroberto <[email protected]>:
When a class definition was re-executed (reload, exec ..) , pickling of
existing instances fails for to picky reason (class object id mismatch). Solved
by the one liner patch below.
Rational: Python is dynamic. Like with any normal attribute lookup: When its
the same module/..name this class is really meant - no matter about its id.
(During unpickling its another id anyway, the code may have evolved years ...)
diff -ur --strip _orig/pickle.py ./pickle.py
--- _orig/pickle.py 2008-09-08 10:58:32 +0000
+++ ./pickle.py 2011-11-24 15:47:11 +0000
@@ -747,7 +747,7 @@
"Can't pickle %r: it's not found as %s.%s" %
(obj, module, name))
else:
- if klass is not obj:
+ if klass.__name__ != obj.__name__:
raise PicklingError(
"Can't pickle %r: it's not the same object as %s.%s" %
(obj, module, name))
----------
components: Library (Lib)
messages: 148311
nosy: kxroberto
priority: normal
severity: normal
status: open
title: pickle to picky on re-defined classes
type: crash
versions: Python 2.6, Python 2.7, Python 3.1, Python 3.2, Python 3.3, Python 3.4
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Python tracker <[email protected]>
<http://bugs.python.org/issue13479>
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