Sets your nick.
        Required arguments:
        * nick - New nick or a tuple of possible new nicks.

def nick(self, nick):
        """
        Sets your nick.
        Required arguments:
        * nick - New nick or a tuple of possible new nicks.
        """
        nick_set_successfully = False
        try:
            self._nick(nick)
            nick_set_successfully = True
        except TypeError:
            for nick_ in nick:
                try:
                    self._nick(nick_)
                    nick_set_successfully = True
                    break

                except self.NicknameInUse:
                    pass
        if not nick_set_successfully:
            self.exception('433')