[Python-bugs-list] [ python-Bugs-416951 ] Problem with dictionary default argument

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Bugs item #416951, was updated on 2001-04-17 22:29
You can respond by visiting: 
http://sourceforge.net/tracker/?func=detail&atid=105470&aid=416951&group_id=5470

Category: Parser/Compiler
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: Problem with dictionary default argument

Initial Comment:
-- Python 2.0 Win32 --

It seems to be that _default argument values_ can be 
changed permanently if they are dictionaries.

Code sample:

def f(a = 1):
  print a
  a = 2

>>>f()
1
>>>f()
1

--> ok

def g(mydic = {}):
  print mydic
  mydic["test"] = 1

>>>g()
{}
>>>g()
{'test': 1}

--> bad (default argument value for 'mydic' changed)

----------------------------------------------------------------------

You can respond by visiting: 
http://sourceforge.net/tracker/?func=detail&atid=105470&aid=416951&group_id=5470