On Wed, Dec 21, 2011 at 4:39 AM, Emeka <emekami...@gmail.com> wrote: > > Hello All,
> v = [] > > def add_to_list(plist): > u = plist.append(90) > return u > > add_to_list(v) # This function call returns nothing > Could someone explain why this function call will return nothing? It's because add_to_list returns the value returned from plist.append stored in u. append changes a list in place and returns nothing. Functions that return nothing return None. This is why it'll be None - u is None because append returns None. > add_to_list([]) > This one returns nothing, why? It's because the object [] here has no name, so that you have no way to refer to it after the function changes it, since it changes it in place. It gets eaten by Python, never to be seen again. -- http://mail.python.org/mailman/listinfo/python-list
