(self)
Wait for the worker processes to exit. One must call
        close() or terminate() before using join().
Wait for the worker processes to exit. One must call
        close() or terminate() before using join().
Wait for the worker processes to exit . One must call close () or terminate () before using join () .
def join(self):
        """Wait for the worker processes to exit. One must call
        close() or terminate() before using join()."""
        for thr in self._workers:
            thr.join()
def join ( self ) : for thr in self . _workers : thr . join ( )