Pyenos wrote: > def enlargetable(table,col): > return table.append(col) > > def removecolfromtable(table,col): > return table.remove(col) > > print enlargetable([[1],[2],[3]],[4]) # returns None > > Why does it return None instead of [[1],[2],[3],[4]] which I expected?
append modifies the list and then returns None: >>> print a [1, 2, 3] >>> print a.append(4) None >>> print a [1, 2, 3, 4] The reasoning given at http://www.python.org/doc/faq/general.html#why-doesn-t-list-sort-return-the-sorted-list is so you wont do something like this: a = [1,2,3] b = a.append(4) and assume that a is still [1,2,3] More discussion on this topic is available at http://groups.google.com/group/comp.lang.python/browse_thread/thread/8ab2e67550123b92 Todd -- http://mail.python.org/mailman/listinfo/python-list
