[英]Python: How to terminate multithreaded python program?
我想創建一個程序,其中有兩個主機列表可用。 我想從每個主機讀取數據。 這大約需要5到10秒鍾,因此我想使用不同的線程讀取每個主機數據。
我創建了下面的代碼,它按我的期望工作,但是唯一的問題是當我按Ctrl + c時,程序沒有終止。
我的代碼:
import threading
import time,os,sys
import signal
is_running = True
def signal_handler(signal, frame):
print "cleaning up...please wait..."
v1.stop()
v2.stop()
global is_running
is_running = False
class Thread2(threading.Thread):
def __init__(self, function,args):
self.running = False
self.function = function
self.args = args
super(Thread2, self).__init__()
def start(self):
self.running = True
super(Thread2, self).start()
def run(self):
while is_running:
self.function(self.args)
time.sleep(time_interval)
def stop(self):
self.running = False
def b_iterate(hostnames):
for host_name in hostnames:
v = Thread2(function = read_cet_data,args = host_name)
v.start()
def read_b_data(host):
#
#reading some data from current host (5-10 seconds processing)
#
#here, this thread is not neccessary, want to stop or kill or terminate it
if threading.current_thread().isAlive():
threading.current_thread().stop()
def a_iterate(entp_hostnames):
for host_name in entp_hostnames:
v = Thread2(function = read_entp_data,args = host_name)
v.start()
def read_a_data(host):
#
#reading some data from current host (5-10 seconds processing)
#
#here, this thread is not neccessary, want to stop or kill or terminate it
if threading.current_thread().isAlive():
threading.current_thread().stop()
if __name__ == "__main__":
signal.signal(signal.SIGINT, signal_handler)
#a_hostnmaes & b_hostnmaes are the lists of hostnames
v1 = Thread2(function = a_iterate,args = a_hostnames)
v2 = Thread2(function = b_iterate,args = b_hostnames)
v1.start()
v2.start()
while is_running:
pass
我如何使該程序在按Ctrl + c后終止。 我想念什么嗎?
如果只希望控件C完成所有操作,則無需在線程中使用Stop函數。 您可以將它們守護進程:
v1 = Thread2(function = a_iterate,args = a_hostnames)
v2 = Thread2(function = b_iterate,args = b_hostnames)
v1.daemon = True
v2.daemon = True
v1.start()
v2.start()
一旦主程序終止,這些線程也會終止。 您需要在創建線程的代碼中的所有其他位置添加.daemon = True。
漢努
你可以
要么
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