def __init__(self, request, fileObject, offset, size):
        """
        Initialize the instance.

        @param request: See L{StaticProducer}.
        @param fileObject: See L{StaticProducer}.
        @param offset: The offset into the file of the chunk to be written.
        @param size: The size of the chunk to write.
        """
        StaticProducer.__init__(self, request, fileObject)
        self.offset = offset
        self.size = size

        Initialize the instance.

        @param request: See L{StaticProducer}.
        @param fileObject: See L{StaticProducer}.
        @param offset: The offset into the file of the chunk to be written.
        @param size: The size of the chunk to write.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/web/static.py