mutable default parameter problem [Prothon]
Peter Hansen
peter at engcorp.com
Wed Jun 16 16:10:56 EDT 2004
Mark Hahn wrote:
> Andrea Griffini wrote:
>>I like more as an example:
>> >>> def foo(x):
>> ... if not hasattr(foo,'list'):
>> ... foo.list = []
>> ... foo.list.append(x)
>> ... print foo.list
>
> In Prothon:
> def foo(x):
> print foo.list.append!(x)
> foo.list = []
>
> (Sorry. I couldn't resist bragging.)
About what?
Python 2.3.3 (#51, Dec 18 2003, 20:22:39) [MSC v.1200 32 bit (Intel)]
>>> def foo(x):
... foo.list.append(x)
... print foo.list
...
>>> foo.list = []
>>> foo('test')
['test']
(Oh, did you mean bragging about how a hard-to-see exclamation
mark causes append() to return the sequence? I thought
maybe it was about the function attribute or something.)
-Peter
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