def close(self):
        """Release any resources that are in use."""
        #    Implementation note for subclasses:
        #
        #    * Memory-based resources can be left to the garbage-collector.
        #    * However, any open files should be closed, and subprocesses
        #      should be terminated.
        #    * Be wary that shallow copies are frequently used.
        #      Closing a Clip may affect its copies.
        #    * Therefore, should NOT be called by __del__().
        pass
Release any resources that are in use.
moviepy/Clip.py