如何防止在设置信号处理程序时忽略异常:<module'threading'from ...>？

Question

有这个代码:

def signal_handler(signal, frame):
  print("exiting")
   sys.exit(0)

if __name__ == "__main__":
  signal.signal(signal.SIGINT, signal_handler)

  threads_arr = []
  for i in list:
    t = threading.Thread(target=myFunc, args=(i))
    threads_arr.append(t)
    t.start()

如何在按下时阻止此操作 Ctrlc

Exception ignored in: <module 'threading' from '/usr/lib/python3.4/threading.py'>
Traceback (most recent call last):
  File "/usr/lib/python3.4/threading.py", line 1294, in _shutdown
    t.join()
  File "/usr/lib/python3.4/threading.py", line 1060, in join
    self._wait_for_tstate_lock()
  File "/usr/lib/python3.4/threading.py", line 1076, in _wait_for_tstate_lock
    elif lock.acquire(block, timeout):
  File "./script.py", line 28, in signal_handler
    sys.exit(0)
SystemExit: 0

第28行指向的地方sys.exit(0).

编辑 尝试添加t.join()(或t.join(1))在最后一个for循环中main我得到相同但我必须按下Ctrlc以获取此错误并退出程序.

Answer 1

问题是您没有将线程设置为守护进程，也没有加入线程，因此当主线程死亡时，其余线程继续在后台运行。

如果您将代码编辑为如下所示，那么它将起作用：

import signal
import threading
import sys

def signal_handler(signal, frame):
    print("exiting")
    sys.exit(0)

if __name__ == "__main__":
    signal.signal(signal.SIGINT, signal_handler)

    threads_arr = []
    for i in list:
        t = threading.Thread(target=myFunc, args=(i))
        threads_arr.append(t)
        t.daemon = True # die when the main thread dies
        t.start()
    for thr in threads_arr: # let them all start before joining
        thr.join()