Felipe Almeida Lessa wrote:
> Em Dom, 2006-03-19 às 08:54 -0800, Scott David Daniels escreveu:
>> class A(object):
>> def __new__(class_, *args, **kwargs):
>> if class_ is A:
>> if want_a_B1(*args, **kwargs):
>> return B1(*args, **kwargs)
>> elif want_a_B2(*args, **kwargs):
>> return B2(*args, **kwargs)
>> return object.__new__(class_) # Use *a,... except for object
>>
>> class B1(A):
>> def __new__(class_, *args, **kwargs):
>> if class_ is B1:
>> if want_a_B1(*args, **kwargs):
>> return B1(*args, **kwargs)
>> elif want_a_B2(*args, **kwargs):
>> return B2(*args, **kwargs)
>> return super(B1, class_).__new__(class_, *args, **kwargs)
>
> Why you have that if on B1.__new__? B1 will be created only by
> A.__new__, which already did a check.
Of course your are right. It needs to be more like:
class B1(A):
def __new__(class_, *args, **kwargs):
if class_ is B1:
if want_a_C1(*args, **kwargs):
return C1(*args, **kwargs)
elif want_a_C2(*args, **kwargs):
return C1(*args, **kwargs)
return super(B1, class_).__new__(class_, *args, **kwargs)
--Scott David Daniels
[EMAIL PROTECTED]
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