Alexandre Vassalotti <[EMAIL PROTECTED]> added the comment:
I agree that this a bug. However, the liberal functools.partial
constructor makes it hard to pickle partial instances correctly.
Ideally, we would add the __getnewargs__ special method and be done with
it. But, this won't work in this case due to the *args and **kwargs
arguments of partial. Since pickle supports neither, we would need to
use apply(), which going to be removed in Python 3.0, as follow:
>>> import pickletools
>>>
pickletools.dis("c__builtin__\napply\n(cfunctools\npartial\n(c__main__\nf\nt(S'b'\nK\x01dtR.")
0: c GLOBAL '__builtin__ apply'
19: ( MARK
20: c GLOBAL 'functools partial'
39: ( MARK
40: c GLOBAL '__main__ f'
52: t TUPLE (MARK at 39)
53: ( MARK
54: S STRING 'b'
59: K BININT1 1
61: d DICT (MARK at 53)
62: t TUPLE (MARK at 19)
63: R REDUCE
64: . STOP
Unfortunately, pickle.Pickler cannot generate a such pickle stream. So
this bug is symptom of the bigger issue that classes with *args and/or
**kwargs argument cannot be made picklable.
----------
nosy: +alexandre.vassalotti
priority: -> normal
resolution: invalid ->
status: closed -> open
_______________________________________
Python tracker <[EMAIL PROTECTED]>
<http://bugs.python.org/issue1398>
_______________________________________
_______________________________________________
Python-bugs-list mailing list
Unsubscribe:
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
