code: def append_stream(self, destination, *, offset=0):
          
          return self.get_stream(
              "APPE " + str(destination),
              "1xx",
              offset=offset,
          )
docs: Create stream for append (write) data to `destination` file.
  
          :param destination: destination path of file on server side
          :type destination: :py:class:`str` or :py:class:`pathlib.PurePosixPath`
  
          :param offset: byte offset for stream start position
          :type offset: :py:class:`int`
  
          :rtype: :py:class:`aioftp.DataConnectionThrottleStreamIO`