def METHOD_NAME(self, text, state):
    """Return the next possible completion for 'text'.
    This is called successively with state == 0, 1, 2, ... until it
    returns None.  The completion should begin with 'text'.
    """
    if self.use_main_ns:
        self.namespace = __main__.__dict__
    if state == 0:
        if "." in text:
            self.matches = self.attr_matches(text)
        else:
            self.matches = self.global_matches(text)
    try:
        return self.matches[state]
    except IndexError:
        return None