def getThreadPool():
        """
        Return the threadpool used by L{IReactorInThreads.callInThread}.
        Create it first if necessary.

        @rtype: L{twisted.python.threadpool.ThreadPool}
        """

        Return the threadpool used by L{IReactorInThreads.callInThread}.
        Create it first if necessary.

        @rtype: L{twisted.python.threadpool.ThreadPool}
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/internet/interfaces.py