New submission from Michael Shields <mshie...@google.com>:
For many years now, the sre module has provided __copy__ and __deepcopy__
modules that raise an exception ("cannot copy this pattern object") by default,
with an #ifdef to enable their implementations. Until Python 2.5, these were
simply unused. Since then, deepcopying these objects fails, instead of falling
back to the default implementation.
Python 2.4.6 (#1, Nov 23 2009, 03:28:22)
[GCC 4.2.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import re
>>> x = [re.compile('.*')]
>>> import copy
>>> copy.deepcopy(x)
[<_sre.SRE_Pattern object at 0x7f3e9411e168>]
Python 2.6.2 (r262:71600, Jul 24 2009, 17:29:21)
[GCC 4.2.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import re
>>> x = [re.compile('.*')]
>>> import copy
>>> copy.deepcopy(x)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/grte/v1/k8-linux/lib/python2.6/copy.py", line 162, in deepcopy
y = copier(x, memo)
File "/usr/grte/v1/k8-linux/lib/python2.6/copy.py", line 228, in _deepcopy_list
y.append(deepcopy(a, memo))
File "/usr/grte/v1/k8-linux/lib/python2.6/copy.py", line 173, in deepcopy
y = copier(memo)
TypeError: cannot deepcopy this pattern object
I'll attach a patch against 2.7 to correct this.
----------
components: Library (Lib)
messages: 118469
nosy: Michael.Shields
priority: normal
severity: normal
status: open
title: Regex objects became uncopyable in 2.5
type: behavior
versions: Python 2.5, Python 2.6, Python 2.7
_______________________________________
Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue10076>
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