def resumeProducing():
        """
        Produce data for the consumer a single time.

        This tells a producer to produce data for the consumer once
        (not repeatedly, once only). Typically this will be done
        by calling the consumer's C{write} method a single time with
        produced data. The producer should produce data before returning
        from C{resumeProducing()}, that is, it should not schedule a deferred
        write.
        """

        Produce data for the consumer a single time.

        This tells a producer to produce data for the consumer once
        (not repeatedly, once only). Typically this will be done
        by calling the consumer's C{write} method a single time with
        produced data. The producer should produce data before returning
        from C{resumeProducing()}, that is, it should not schedule a deferred
        write.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/internet/interfaces.py