thomas.han...@gmail.com wrote: ...
So any ideas on how to get a function called on an object just after __init__ is done executing? -- http://mail.python.org/mailman/listinfo/python-list
Yes, you *can* use metaclasses - you need to override the type.__call__ method, which is what normally calls __new__ then __init__:
>>> class MetaOnLoad(type): ... def __call__(cls, *args, **kw): ... obj=type.__call__(cls, *args, **kw) ... obj.on_load() ... return obj ... >>> class A(object): ... __metaclass__ = MetaOnLoad ... def __init__(self): ... print "__init__ A" ... def on_load(self): ... print "on_load" ... >>> class B(A): ... def __init__(self): ... super(B,self).__init__() ... print "__init__ B" ... >>> b=B() __init__ A __init__ B on_load >>> class C(B): ... def __init__(self): ... super(C,self).__init__() ... print "__init__ C" ... >>> c=C() __init__ A __init__ B __init__ C on_load >>> #Check that __new__ machinery is still available: >>> class D(C): ... def __new__(cls,*args, **kw): ... obj = object.__new__(cls, *args, **kw) ... print "__new__ D" ... return obj ... >>> d=D() __new__ D __init__ A __init__ B __init__ C on_load >>> HTH Michael -- http://mail.python.org/mailman/listinfo/python-list
