def run():
        """
        Fire 'startup' System Events, move the reactor to the 'running'
        state, then run the main loop until it is stopped with C{stop()} or
        C{crash()}.
        """

        Fire 'startup' System Events, move the reactor to the 'running'
        state, then run the main loop until it is stopped with C{stop()} or
        C{crash()}.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/internet/interfaces.py