[Tutor] Re: Python vs. Ruby
Andrei
project5 at redrival.net
Fri Oct 31 10:32:52 EST 2003
Abel Daniel wrote on Fri, 31 Oct 2003 15:57:20 +0100:
> Andrei writes:
>> class Fun:
>> def __init__(self, *funcs):
>> self.funcs = []
>> self.funcs.extend(funcs)
>> def __add__(self, func):
>> self.funcs.extend(func.funcs)
>> return Fun(*self.funcs)
>> def __call__(self, *args):
>> results = [ f(*args) for f in self.funcs ]
>> return sum(results)
>>
>
> This will behave suprisingly:
>
>>>>import math
>>>>sin=Fun(math.sin)
>>>>cos=Fun(math.cos)
>>>>f = sin + cos
>>>>print sin(1)
> will give the wrong result.
>
> Doing C = A + B shouldn't change A or B.
Good point. I hadn't done any testing beyond what I'd posted.
--
Yours,
Andrei
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