methods of metaclasses on class instances.
- by Stefano Borini
I was wondering what happens to methods declared on a metaclass. I expected that if you declare a method on a metaclass, it will end up being a classmethod, however, the behavior is different. Example
>>> class A(object):
... @classmethod
... def foo(cls):
... print "foo"
...
>>> a=A()
>>> a.foo()
foo
>>> A.foo()
foo
However, if I try to define a metaclass and give it a method foo, it seems to work the same for the class, not for the instance.
>>> class Meta(type):
... def foo(self):
... print "foo"
...
>>> class A(object):
... __metaclass__=Meta
... def __init__(self):
... print "hello"
...
>>>
>>> a=A()
hello
>>> A.foo()
foo
>>> a.foo()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: 'A' object has no attribute 'foo'
What's going on here exactly ?
edit: bumping the question
