Bugs item #1661603, was opened at 2007-02-16 16:32
Message generated for change (Tracker Item Submitted) made by Item Submitter
You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1661603&group_id=5470
Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: Parser/Compiler
Group: Python 2.4
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Matthijs (matthijsd)
Assigned to: Nobody/Anonymous (nobody)
Summary: Misleading behavior for [] and {} default arguments
Initial Comment:
Hello
On python 2.3.4 and 2.4.3,
>>> def a(x=[]):
... return x
...
>>> y=a()
>>> y.append(1)
>>> a()
[1]
Hence, the default argument is not recomputed. The same behavior occurs with
x={} instead of x=[].
This looks like a bug because it is not coherent with
>>> def f():
... return []
...
>>> y=f()
>>> y.append(5)
>>> f()
[]
So, is it a feature?
Thanks
----------------------------------------------------------------------
You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1661603&group_id=5470
_______________________________________________
Python-bugs-list mailing list
Unsubscribe:
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
