Thanks for clearing up the other incorrect answers! In true Python fashion, I would also remind everyone of the *documentation* - in particular the Python tutorial. These are very elementary mistakes to be making - even worse as part of attempted answers.
The Python tutorial is at http://docs.python.org/tut/tut.html In particular see the section on classes: http://docs.python.org/tut/node11.html Note however that the tutorial doesn't show the current best practice of subclassing your classes from "object", i.e. class MyClass(object): #...etc... -Jason On Jul 12, 11:51 am, Wildemar Wildenburger <[EMAIL PROTECTED]> wrote: > Bart Ogryczak wrote: > > On 12 jul, 17:23, Jeremy Lynch <[EMAIL PROTECTED]> wrote: > > >> Hello, > > >> Learning python from a c++ background. Very confused about this: > > >> ============ > >> class jeremy: > >> list=[] > > > You've defined list (very bad choice of a name, BTW), as a class > > variable. To declare is as instance variable you have to prepend it > > with "self." > > Ouch! > > 'self' is *not* a reserved ord in python, it doesn't do anything. So > just popping 'self' in front of something doesn't bind it to an instance. > Here is how it works: > > class Jeremy(object): # you better inherit from 'object' at all times > classlist = [] # class variable > def __init__(self): # "constructor" > self.instancelist = [] # instance variable > def add_item(self, item): > self.instancelist.append(item) > > 'self' is the customary name for the first argument of any instance > method, which is always implicitly passed when you call it. I think it > translates to C++'s 'this' keyword, but I may be wrong. Simply put: The > first argument in an instance-method definition (be it called 'self' or > otherwise) refers to the current instance. > Note however that you don't explicitly pass the instance to the method, > that is done automatically: > > j = Jeremy() # Jeremy.__init__ is called at this moment, btw > j.add_item("hi") # See? 'item' is the first arg you actually pass > > I found this a bit confusing at first, too, but it's actually very > clean, I think. > /W -- http://mail.python.org/mailman/listinfo/python-list
