On 11/14/05, Bengt Richter <[EMAIL PROTECTED]> wrote: > On 14 Nov 2005 11:20:53 GMT, Antoon Pardon <[EMAIL PROTECTED]> wrote: > > >Op 2005-11-14, Paul Rubin schreef <http>: > >> Antoon Pardon <[EMAIL PROTECTED]> writes: > >>> We could then have something like the following. > >>> > >>> a = 5 > >>> b = a > >>> a @= 7 > >>> b ==> would result in 7. > >> > >> Ouch! :-((( > >> > >> Can't you live with > >> > >> a = [5] > >> b = a > >> a[0] = 7 > >> > >> so b[0] is now 7. > > > >And what do I have to do, in case of the following: > > > >a = [3, 5] > >b = a[0] > >b @= 7 > >a ==> would result in [7, 5] > > > >This may seem contrived, but in combination with > >parameters it could be usefull. > > > >Something like: > > > >a = [3, 5] > > > >def treat(b): > > lots of code > > b @= new_value > > > >f(a[0]) > >a ==> would result in [7, 5] > > > >-- > You may be interested in reviewing > > > http://groups.google.com/group/comp.lang.python/browse_thread/thread/f96b496b6ef14e2/32d3539e928986b3 > > before continuing this topic ;-)
I read that thread, and am glad I did before asking like I was going to, if only to avoid being yelled at for not understanding Python variables ;) I understand them, I really do, and I know why they act the way they do, but I still wanted a reference type for binding GUI objects to data values - for example, a spinner control to an int value. In C++, I do it by passing a pointer to an int to the control and letting it do its thing. Theres no simple obvious way to do the same thing in Python - I ended up by passing a namespace(any object) and an attribute (by name) and then setting it via setattr in in the control, which is non-obvious and icky. > > Regards, > Bengt Richter > -- > http://mail.python.org/mailman/listinfo/python-list > -- http://mail.python.org/mailman/listinfo/python-list
