Peter Otten wrote:
> Eric Brunel wrote:
>
>
>>My actual question is: why does it work in one case and not in the other?
>>As I see it, int is just a function with one parameter, and the lambda is
>>just another one. So why does the first work, and not the second? What
>>'black magic' takes place so that int is not mistaken for a method in the
>>first case?
>
>
> A python-coded function has a __get__ attribute, a C-function doesn't.
> Therefore C1.f performs just the normal attribute lookup while C2.f also
> triggers the f.__get__(C2(), C2) call via the descriptor protocol which
> happens to return a bound method.
FWIW:
class Obj(object):
def __new__(cls, val, *args, **kw):
print "in Obj.__new__"
print "- called with :"
print " cls :", cls
print " val :", val
print " args:", str(args)
print " kw :", kw
obj = object.__new__(cls, *args, **kw)
print "got : %s - %s" % (obj, dir(obj))
return obj
class CPlus(C):
f = Obj
> Peter
>
>
--
bruno desthuilliers
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