a_list.count(a_callable) ?

[Carsten Haese]

On Fri, 2007-06-15 at 14:39 -0400, Carsten Haese wrote:
> class WhereTrue(object):
>     def __init__(self, func):
>         self.func = func
>     def __eq__(self, other):
>         return self.func(other)
> 
> list1.count(WhereTrue(callable1))
> list2.count(WhereTrue(callable2))

P.S: Note, however, that this will only work if the list elements don't
define __eq__ methods themselves. If they do, their __eq__ methods get
called instead of WhereTrue's __eq__ method, leading to incorrect
results.

-- 
Carsten Haese
http://informixdb.sourceforge.net