question od default args

Hans Nowak wurmy at earthlink.net
Wed Jun 26 19:50:42 CEST 2002


Gonçalo Rodrigues wrote:
> Hi,
> 
> When I want default args I usually do
> 
> def (arg = None):
>     ...
> 
> But what if I want to make None a reasonable argument too? That is, I
> want to know if the user has in fact passed an argument, and if not to
> do something special, with None (or whatever object) being a reasonable
> arg to be passed.

Hmm, so use a default argument that is not reasonable to pass... some weird 
string, or a complex number, or even an instance of a (singleton?) class 
written especially for this... although that may be a bit overkill. Of course, 
the question is what is "reasonable" here and what not...

-- 
Hans (base64.decodestring('d3VybXlAZWFydGhsaW5rLm5ldA=='))
# decode for email address ;-)
The Pythonic Quarter:: http://www.awaretek.com/nowak/




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