def pop(self):
        """
        Pop the frame at the top of the stack.
        @return: The popped frame, else None.
        @rtype: L{Frame}
        """
        if len(self.stack):
            popped = self.stack.pop()
            log.debug('pop: (%s)\n%s', Repr(popped), Repr(self.stack))
            return popped
        else:
            log.debug('stack empty, not-popped')
        return None
def pop ( self ) : if len ( self . stack ) : popped = self . stack . pop ( ) log . debug ( 'pop: (%s)\n%s' , Repr ( popped ) , Repr ( self . stack ) ) return popped else : log . debug ( 'stack empty, not-popped' ) return None
Pop the frame at the top of the stack.
        @return: The popped frame, else None.
        @rtype: L{Frame}