Noah, Calvin Thanks so much!
Regards, Emeka On Wed, Dec 21, 2011 at 6:57 AM, Noah Hall <enali...@gmail.com> wrote: > 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. > -- *Satajanus Nig. Ltd *
-- http://mail.python.org/mailman/listinfo/python-list
