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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def flush(self):
 """ Flush the write buffers of the stream if applicable and save the object on the cloud. """

        if self._writable:
            with self._seek_lock:
                buffer = self._get_buffer()

                # Flush that part of the file
                end = self._seek
                start = end - len(buffer)

                # Clear buffer
                self._write_buffer = bytearray()

            # Flush content
            with handle_os_exceptions():
                self._flush(buffer, start, end)