tox.py 文件源码

def friend_get_name_size(self, friend_number):
        """
        Return the length of the friend's name. If the friend number is invalid, the return value is unspecified.

        The return value is equal to the `length` argument received by the last `friend_name` callback.
        """
        tox_err_friend_query = c_int()
        result = Tox.libtoxcore.tox_friend_get_name_size(self._tox_pointer, c_uint32(friend_number),
                                                         byref(tox_err_friend_query))
        tox_err_friend_query = tox_err_friend_query.value
        if tox_err_friend_query == TOX_ERR_FRIEND_QUERY['OK']:
            return result
        elif tox_err_friend_query == TOX_ERR_FRIEND_QUERY['NULL']:
            raise ArgumentError('The pointer parameter for storing the query result (name, message) was NULL. Unlike'
                                ' the `_self_` variants of these functions, which have no effect when a parameter is'
                                ' NULL, these functions return an error in that case.')
        elif tox_err_friend_query == TOX_ERR_FRIEND_QUERY['FRIEND_NOT_FOUND']:
            raise ArgumentError('The friend_number did not designate a valid friend.')