标签：UNC pytho target 出现 停止 多线程实例 %s time The
1.0 threading 的join方法就是用来阻塞用的，可以阻塞主线程，等待所的子线程结束后，然后再运行后面的程序：
import threading import time from time import ctime,sleep def music(func): for i in range(2): print("I was listening to %s.%s" %(func,ctime())) sleep(1) print("end listening %s" % ctime()) def movie(func): for i in range(2): print("I was at the %s %s" %(func,ctime())) sleep(5) print("end watch %s" % ctime()) threads = [] t1 = threading.Thread(target=music,args=("overstock",)) threads.append(t1) t2 = threading.Thread(target=movie,args=("kill them all",)) threads.append(t2) if __name__ =="__main__": for t in threads: t.start() t2.join() print("all over %s" %ctime())
此时，会等t2运行完成后，才执行最后的print语句。
import threading import time from time import ctime,sleep def music(func): for i in range(2): print("I was listening to %s.%s" %(func,ctime())) sleep(1) print("end listening %s" % ctime()) def movie(func): for i in range(2): print("I was at the %s %s" %(func,ctime())) sleep(5) print("end watch %s" % ctime()) threads = [] t1 = threading.Thread(target=music,args=("overstock",)) threads.append(t1) t2 = threading.Thread(target=movie,args=("kill them all",)) threads.append(t2) if __name__ =="__main__": for t in threads: t.start() t1.join() print("all over %s" %ctime())
此时，只会运行完t1后，就会执行最后的print
2.0 threading 的daemon，当我们使用setDaemon(True)方法，设置子线程为守护线程时，主线程一旦执行结束，则全部线程全部被终止执行，可能出现的情况就是，子线程的任务还没有完全执行结束，就被迫停止
import threading import time from time import ctime,sleep def music(func): for i in range(2): print("I was listening to %s.%s" %(func,ctime())) sleep(1) print("end listening %s" % ctime()) def movie(func): for i in range(2): print("I was at the %s %s" %(func,ctime())) sleep(5) print("end watch %s" % ctime()) threads = [] t1 = threading.Thread(target=music,args=("overstock",)) threads.append(t1) t2 = threading.Thread(target=movie,args=("kill them all",)) threads.append(t2) if __name__ =="__main__": for t in threads: t.setDaemon(True) t.start() print("all over %s" %ctime())
跑完主线程，直接关闭程序。
import threading import time from time import ctime,sleep def music(func): for i in range(2): print("I was listening to %s.%s" %(func,ctime())) sleep(1) print("end listening %s" % ctime()) def movie(func): for i in range(2): print("I was at the %s %s" %(func,ctime())) sleep(5) print("end watch %s" % ctime()) threads = [] t1 = threading.Thread(target=music,args=("overstock",)) threads.append(t1) t2 = threading.Thread(target=movie,args=("kill them all",)) threads.append(t2) if __name__ =="__main__": t2.setDaemon(True) for t in threads: t.start() print("all over %s" %ctime())
t2 setDaemon(True),守护线程，t1还是得等，但是只要t1运行完，就会不等t2，直接关闭程序
3.0 threading.current_thread() 线程名
4.0 threading.active_count() 在运行的线程数量。
【Rollo的Python之路】多线程实例 Join 与Daemon
标签：UNC pytho target 出现 停止 多线程实例 %s time The
原文地址：https://www.cnblogs.com/rollost/p/10914890.html
