__del__ I use it to close a mysql connection
-Alex Goretoy http://www.goretoy.com E. B. White - "Be obscure clearly." On Mon, Mar 16, 2009 at 10:11 PM, thomas.han...@gmail.com < thomas.han...@gmail.com> wrote: > Hi all, > > We've been breaking our heads over a good way of accomplishing an > "on_load" event in our multitouch GUI frameowork PyMT. We think we'd > like to trigger an "on_load" event after a class is fully instantiated > (or just a function call for simplicity, so you dont need to worry > about our specific system). This is so that if I make a subclass of > some widget, I dont have to overwrite the __init__ method (use super, > know the args, and pass them) everytime. Maybe I just want to do some > really basic stuff that doesn't really have anything to do with the > parent class. > > Anyway. My first attempt was to simply put a call to self.on_load at > the end of the widget base class. This doesn't work though, because, > if I subclass it and do things after the call to super.__init__, > on_load will be called before the constructor finishes (when the top > most parent class __init__ finishes) > > We've sort of managed to achieve this by using a decorator that > changes the __init__ function. but even this doesnt seem like the > best way to do this. a) I now have to decorate every constructor i > ever write. b) it seems impossible to make it so that it only happens > once after the object is actually instantiated (since i have a > decorator on all my constructors..each constructor in the inheritance > line will call on_load once) > > Can I do something fancy with metaclasses here? I think I could kind > of do this by making all my classes use __new__, and then essentially > use __init__ as what i want on_load to be...but that just seems really > nasty and unpythonic. not to speak about the confusion it would cause > with people trying to figure out the library. > > 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 >
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