On Sun, 03 Aug 2008 02:44:34 -0700, Victor Lin wrote:
> Now, here comes the problem : I have to override all the operation
> methods, such as __add__ and __mul__. I know the most stupid way is just
> to write all of them like this.
>
> def __add__(self, other):
> self.leftOperation('add', other)
>
> def __mul__(self, other):
> self.leftOperation('mul', other)
>
> But I don't want to do that in this stupid way. I want to use little
> code to redirect these operation methods to some specific method with
> it's name.
>
> What can I do?
I usually dislike code that uses exec, but this is one place where I'm
tempted to make an exception (mainly because I can't think of an
alternative). Untested and at your own risk:
def factory(name):
"""Return a method name and a function."""
def func(self, other):
return self.LeftOperation(name, other)
return "__%s__" % name, func
class Parrot(object):
for name in ["mul", "add", "sub", "pow"]: # and many more...
name, f = factory(name)
exec "%s = f" % name
del name, f
Urrggh. I feel dirty. *wink*
--
Steve
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