tox.py 文件源码

def friend_get_public_key(self, friend_number, public_key=None):
        """
        Copies the Public Key associated with a given friend number to a byte array.

        :param friend_number: The friend number you want the Public Key of.
        :param public_key: pointer (c_char_p) to a memory region of at least TOX_PUBLIC_KEY_SIZE bytes. If this
        parameter is None, this function allocates memory for Tox Public Key.
        :return: Tox Public Key
        """
        if public_key is None:
            public_key = create_string_buffer(TOX_PUBLIC_KEY_SIZE)
        tox_err_friend_get_public_key = c_int()
        Tox.libtoxcore.tox_friend_get_public_key(self._tox_pointer, c_uint32(friend_number), public_key,
                                                 byref(tox_err_friend_get_public_key))
        tox_err_friend_get_public_key = tox_err_friend_get_public_key.value
        if tox_err_friend_get_public_key == TOX_ERR_FRIEND_GET_PUBLIC_KEY['OK']:
            return bin_to_string(public_key, TOX_PUBLIC_KEY_SIZE)
        elif tox_err_friend_get_public_key == TOX_ERR_FRIEND_GET_PUBLIC_KEY['FRIEND_NOT_FOUND']:
            raise ArgumentError('No friend with the given number exists on the friend list.')