Bugs item #1114776, was opened at 2005-02-02 09:43
Message generated for change (Comment added) made by kbk
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Category: Python Library
Group: Python 2.3
Status: Open
Resolution: Fixed
Priority: 9
Submitted By: Vincenzo Di Somma (disommav)
Assigned to: Anthony Baxter (anthonybaxter)
Summary: copy.py bug
Initial Comment:
upgrading from python 2.3.4 to 2.3.5rc1 I got this
error on a module that was working correctly
File "../Field.py", line 203, in copy
properties = deepcopy(cdict)
File "/usr/lib/python2.3/copy.py", line 191, in deepcopy
y = copier(x, memo)
File "/usr/lib/python2.3/copy.py", line 285, in
_deepcopy_dict
y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/lib/python2.3/copy.py", line 200, in deepcopy
copier = _getspecial(cls, "__deepcopy__")
File "/usr/lib/python2.3/copy.py", line 66, in
_getspecial
for basecls in cls.__mro__:
AttributeError: __mro__
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>Comment By: Kurt B. Kaiser (kbk)
Date: 2005-04-14 16:00
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Should this be closed?
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Comment By: Alex Martelli (aleax)
Date: 2005-02-06 02:57
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Fixed (using inspect.getmro instead of direct __mro__ access) -- added
unittest for that thanks to John Lenton's suggestion on c.l.py
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Comment By: Alex Martelli (aleax)
Date: 2005-02-05 04:07
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The problem's easy to fix (using inspect.getmro instead of direct
__mro__ access) but hard to reproduce -- what type not recorded in the
dispatch table lacks an __mro__? Can't find one easily, and I'd like to
have a unit-test reproducing the bug before I commit the fix.
Vincenzo, can you explain what the type is happening to be in that value
whose deepcopy gives problems? or can anybody else suggest a type as
above?
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Comment By: Anthony Baxter (anthonybaxter)
Date: 2005-02-02 22:26
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http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=293338
has a fuller stack trace.
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Comment By: Michael Hudson (mwh)
Date: 2005-02-02 14:35
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Eek, that sounds pretty bad! Can you attach the code/cook up a smaller
test case?
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