(self)
Return ``True`` if the watcher is active and is used by the event loop.

        Return True if the watcher is installed and ready to handle process exit
        notifications.
Return ``True`` if the watcher is active and is used by the event loop.
Return True if the watcher is active and is used by the event loop .
def is_active(self):
        """Return ``True`` if the watcher is active and is used by the event loop.

        Return True if the watcher is installed and ready to handle process exit
        notifications.

        """
        raise NotImplementedError()
def is_active ( self ) : raise NotImplementedError ( )