extending class

Andrea Crotti andrea.crotti.0 at gmail.com
Fri Sep 23 15:59:56 CEST 2011


Jean-Michel Pichavant <jeanmichel at sequans.com> writes:

> Did you consider subclassing your Var class ? This is how you extend a
> class behavior in OOP.
>
> class PSIVar(var):
>    def __init__(self, name, desc, other=None, fun=None):
>        var.__init__(self, name, desc)
>        if other is not None:
>            self.other = other
>            self.fun = fun
>            assert callable(self.fun)
>
> v1 = PSIVar('name', 'desc')
>
> that's it.
>
> By the way, don't create instance attribute conditionally. Your PSIVar
> instance should always have a 'other' attribute, its value can be None
> though.
>
>
>
> JM


Yes thanks, first I tried that, but I didn't want to have to change my
class definition if the one from the library changes.  So I started to
mess with *args and **kwargs and it was really not beautiful ;)

Anyway since I want to other and more deep changes I just forked the
project and start work on that...



More information about the Python-list mailing list