def __init__(self, reactor, address, backlog=50, mode=0o666, wantPID=0):
        """
        @param reactor: An L{IReactorUNIX} provider.
        @param address: The path to the Unix socket file, used when listening
        @param backlog: number of connections to allow in backlog.
        @param mode: mode to set on the unix socket.  This parameter is
            deprecated.  Permissions should be set on the directory which
            contains the UNIX socket.
        @param wantPID: If True, create a pidfile for the socket.
        """
        self._reactor = reactor
        self._address = address
        self._backlog = backlog
        self._mode = mode
        self._wantPID = wantPID

        @param reactor: An L{IReactorUNIX} provider.
        @param address: The path to the Unix socket file, used when listening
        @param backlog: number of connections to allow in backlog.
        @param mode: mode to set on the unix socket.  This parameter is
            deprecated.  Permissions should be set on the directory which
            contains the UNIX socket.
        @param wantPID: If True, create a pidfile for the socket.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/internet/endpoints.py