On Apr 11, 9:09 am, Bruno Desthuilliers <bruno.
[EMAIL PROTECTED]> wrote:
> goodwolf a écrit :
> (snip)
>
> > 1. In this case you will prefer a classmethod instead a staticmethod.
> > 2. If counter is the number of instances of class AAA then you will
> > incrase counter inside __init__ method.
>
> > class AAA (object):
> > counter = 0
> > def __init__(self):
> > type(self).counter_increase()
>
> You can call a class method on an instance:
> self.counter_increase()
>
> And FWIW, this is probably something I'd put in the constructor (the
> __new__ method), not in the initializer.
>
> > @classmethod
> > def counter_increase(cls):
> > cls.counter += 1
>
> > or
>
> > class AAA (object):
> > counter = 0
> > def __init__(self):
> > type(self).counter += 1
>
> Instances have a reference to their class, so you can also write this:
> self.__class__.counter += 1
OK, you will use something like this:
class AAA (object):
counter = 0
def __new__(cls):
cls.counter += 1
return super(cls, cls).__new__(cls)
but I think that __new__ is more "low level" and not necessary here,
so I will use:
class AAA (object):
counter = 0
def __init__(self):
self.counter_increase()
@classmethod
def counter_increase(cls):
cls.counter += 1
with yours correction invoking self.counter_increase() instead of more
explicit type(self).counter_increase()
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