Hi Li,
I just added the line and the prints are the same.
FYI, after it hangs there, I killed the program and it showed this. I’m not sure if this is helpful
Traceback (most recent call last):
File “test.py”, line 23, in 
Process Process-2:
p.join()
File “/apps/software/Python/3.7.4-GCCcore-8.3.0/lib/python3.7/multiprocessing/process.py”, line 140, in join
Process Process-1:
res = self._popen.wait(timeout)
File “/apps/software/Python/3.7.4-GCCcore-8.3.0/lib/python3.7/multiprocessing/popen_fork.py”, line 48, in wait
return self.poll(os.WNOHANG if timeout == 0.0 else 0)
File “/apps/software/Python/3.7.4-GCCcore-8.3.0/lib/python3.7/multiprocessing/popen_fork.py”, line 28, in poll
pid, sts = os.waitpid(self.pid, flag)
KeyboardInterrupt