Bruno Desthuilliers wrote: > Bjoern Schliessmann a écrit : >> You can't just declare in Python, you always define objects (and >> bind a name to them). > > def toto(): > global p > p = 42 > > Here I declared 'x' as global without defining it.
Ah well, someone had to notice it ... BTW, where's x? :) >> Yes, globals need to be defined before you >> can access them using "global". > > For which definition of 'defined' ? to define a name: to bind an object to a name > >>> p > Traceback (most recent call last): > File "<stdin>", line 1, in <module> > NameError: name 'p' is not defined > >>> toto() > >>> p > 42 > >>> Easy, p = 42 is a definition. That's also true for translating to C/C++ nomenclature where "declare" means "tell the compiler a name and its type" and "define" means "declare and reserve memory for it". > Hem... I'm not sure you're really addressing the OP's question > here. Me too ... > But anyway: in Python, everything's an object, so the only > thing that makes functions a bit specials is that they are > callable - as are classes, methods, and every instance of a class > implementing __call__ FWIW. So saying 'variables holds data, > functions do stuff' is unapplyiable to Python. I don't think so. Even if everything is an object, there is still a concept behind the words "function" and "variable". >> They are. > > functions are *not* methods of their module. Yes, I used the term very sloppily. At least they are attributes. Regards, Björn -- BOFH excuse #450: Terrorists crashed an airplane into the server room, have to remove /bin/laden. (rm -rf /bin/laden) -- http://mail.python.org/mailman/listinfo/python-list
