other ways to check for <type 'function'>?

Diez B. Roggisch deets at nospam.web.de
Thu Nov 2 12:27:54 CET 2006


Sybren Stuvel schrieb:
> elderic enlightened us with:
>> are there other ways than the ones below to check for <type
>> 'function'> in a python script?
> 
> First of all, why would you want to? If you want to call the object
> as a function, just do so. Handle the exception that is raised when
> it's raised.

That's an advice I've heard a few times to often.

I'm totally buying duck-typing. Yet the advice of simply calling a 
function to determine that it is one isn't sound in a lot of cases where 
you want to use it as callback later on.

E.g. the turbogears DataGrid can get either a string or a callable 
passed as column-data-provider. But which of these two options is used 
must be known at construction time, not at later calling time.

Diez



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