default argument depending on another argumen?

[Marco Herrn]

Gerhard Häring schrieb im Artikel <slrnaslroa.kf.gerhard.haering at lilith.my-fqdn.de>:
> Marco Herrn wrote in comp.lang.python:
>> I want to define a function like this:
>> 
>> def foo(self, bar, x= bar.x):
>>     ....
>>     pass
>> 
>> Now I have the problem that 'bar' isn't really known when defining this
>> function.
>> So how can I achieve this behaviour?
> 
> There's a FAQ entry o this, too IIRC :-)
> 
> The workaround looks like this:
> 
> def foo(self, bar, x=None):
>     if x is None:
>         x = bar.x
>     ...

Thanks again.
I see, I have to look more often on the website ;)

Bye
Marco


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