Testing methods

[Ovid]

Jp Calderone wrote:
>   Sometimes this is undesirable, but then the right answer depends on the
> particulars of why it is undesirable.  There are other approaches, but none
> that work as reliably.  For example:
> 
>     if hasattr(foo, 'some_method') and callable(foo.some_method):
>         ...
> 
>   callable() may return false positives, though.  I don't think it will ever
> return false negatives.

Thank you.  I was actually just playing around with something like that. 
  The main problem is that the method name is determined at run time. 
I've wound up with something like:

     def can(object, method):
         if not hasattr(object, method):
             return 0
         else:
             return callable(getattr(object,method))

While that seems to work okay, you did mention that callable() can 
return false positives.  Can you give some examples?

Cheers,
Ovid