On Jan 1, 7:56 am, iu2 <[EMAIL PROTECTED]> wrote:
> no one has to remember to call the parent's get_name method. It's done
> automatically.
>
> (A PEP maybe? I sense you don't really like it.. ;-)
> What do you think? Good? Too implicit?
>
> iu2
No PEP, this would never pass. There would be no way
to stop a method from calling its parent: you would
lose control of your classes, so I think this is a
bad idea. Having said so, it is easy to implement
what you want with a metaclass:
def callParent(*methodnames):
class Meta(type):
def __init__(cls, name, bases, dic):
for methodname in methodnames:
if methodname in dic:
def new_meth(self, method=methodname):
parent = getattr(super(cls, self), method,
None)
if parent: parent()
child = dic.get(method)
if child: child(self)
setattr(cls, methodname, new_meth)
return Meta
class B(object):
__metaclass__ = callParent('get_name')
def get_name(self):
print "This is B.get_name"
class C(B):
def get_name(self):
print "This is C.get_name"
C().get_name()
Now every subclass of B defining a get_name method
will automagically call its parent method.
Michele Simionato
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