c james a écrit :
> Given a condition at the time a class is instantiated, I want to change
> how __call__ is used. From the example below, self.no is using self.yes
> but self.__call__ is not. Can someone please explain why?
IIRC, you can't override __magic__ methods on a per-instance basis.
> EXAMPLE:
> class YesNo(object):
> def __init__(self, which):
> self.no = self.yes
> self.__call__ = self.yes
>
> def yes(self, val):
> print 'Yes', val
>
> def no(self, val):
> print 'No', val
>
> def __call__(self, val):
> raise NotImplementedError()
This should do the trick:
class YesNo(object):
def __init__(self, which):
self.which = which
def __call__(self, val):
return (self.no, self.yes)[self.which](val)
def yes(self, val):
print 'Yes', val
def no(self, val):
print 'No', val
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