Python在子執行緒無線迴圈的過程中，如果直接ctrl+c結束程式的話，雖然程式可以結束，但是會導致子執行緒資源無法回收，一般情況不會有太大影響，但是使用TCP通訊的時候，子執行緒是佔用特定的埠的，在資源沒有回收的情況下，再次啟動程式就會報端口占用錯誤可以手動回收資源如下：

# 我的套接字的埠是8899

$ netstat -nap | grep

# 會顯示程序號port

$ kill -  port

所以參考https://blog.csdn.net/hp_cpp/article/details/83040162博主的方法如下強制結束子執行緒：

import inspect

import ctypes

from threading import Thread

def _async_raise(tid, exctype):

    """raises the exception, performs cleanup if needed"""

    tid = ctypes.c_long(tid)

    if not inspect.isclass(exctype):

        exctype = type(exctype)

    res = ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, ctypes.py_object(exctype))

    if res == 0:

        raise ValueError("invalid thread id")

    elif res != 1:

        # """if it returns a number greater than one, you're in trouble,

        # and you should call it again with exc=NULL to revert the effect"""

        ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, None)

        raise SystemError("PyThreadState_SetAsyncExc failed")

def stop_thread(thread):

    _async_raise(thread.ident, SystemExit)

def Receive():

    while 1:

        print(1)

        time.sleep(0.1)

def Send():

    while 1:

        print(2)

        time.sleep(0.1)

if __name__ == "__main__":

    t1 = Thread(target=Receive)

    t2 = Thread(target=Send)

    t1.start()

    t2.start()

    stop_thread(t1)

    stop_thread(t2)

以下是我的測試程式，結合signal方法，主執行緒一直迴圈，一旦檢測到按下Ctrl+c，就會打印出'You pressed Ctrl+C!'這句話，並且呼叫上述方法結束兩個無限迴圈的子執行緒，最後呼叫exit()方法優雅的結束整個程式

import inspect

import ctypes

import signal

import sys

import time

from threading import Thread

def _async_raise(tid, exctype):

    """raises the exception, performs cleanup if needed"""

    tid = ctypes.c_long(tid)

    if not inspect.isclass(exctype):

        exctype = type(exctype)

    res = ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, ctypes.py_object(exctype))

    if res == 0:

        raise ValueError("invalid thread id")

    elif res != 1:

        # """if it returns a number greater than one, you're in trouble,

        # and you should call it again with exc=NULL to revert the effect"""

        ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, None)

        raise SystemError("PyThreadState_SetAsyncExc failed")

def stop_thread(thread):

    _async_raise(thread.ident, SystemExit)

def signal_handler(signal, frame):

    print('You pressed Ctrl+C!')

    stop_thread(t1)

    stop_thread(t2)

    sys.exit()

def Receive():

    while 1:

        print(1)

        time.sleep(0.1)

def Send():

    while 1:

        print(2)

        time.sleep(0.1)

if __name__ == "__main__":

    t1 = Thread(target=Receive)

    t2 = Thread(target=Send)

    t1.start()

    t2.start()

    print(3)

    while True:

        signal.signal(signal.SIGINT, signal_handler)

        print(4)

        time.sleep(0.1)