def pop(self, i=None):
if i is None:<EOL><INDENT>i = len(self) - <NUM_LIT:1><EOL><DEDENT>val = self[i]<EOL>del(self[i])<EOL>return val<EOL>
Remove the item at the given position in the list, and return it.
        If no index is specified, removes and returns the last item in the list.