On Jul 22, 6:54 pm, Karim <karim.liat...@free.fr> wrote:
> You're right. Sure the method header is evaluated first I usually not
> fall in this trap when default is a list but a singleton one with the same
> id.
> I answered too fast, I did not understand if he forget the dot or what.
> And the double '_' in init was strange because he uses only one '_' after.
>
> Thanks to take time to point that.
>
> Regards
> Karim
>
> On 07/22/2011 02:06 PM, Thomas Jollans wrote:
>
>
>
>
>
>
>
> > On 22/07/11 13:32, Karim wrote:
> >> I think you did a typo
>
> >> it is
>
> >> def foo2(self, len = self._myvar):
> >> while i< len:
> >> dosomething
>
> > That, of course, won't work: the default argument (in this case:
> > "self._myvar") is looked up when the function is created, and stored
> > with the function. "self" does not exist at that point. (or, if it does,
> > it's the wrong "self")
class foo(object):
def __init__(self, len = 9):
self.__myvar = len
def foo2(self, len = self.__myvar):
while i < len:
do_something
that the initial code, "." and "_" forgot
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