python检查两个线程是否在运行

可以通过以下方法检查两个线程是否在运行：

1. 使用`is_alive()`方法检查线程是否在运行。该方法返回True表示线程正在运行，返回False表示线程已经停止。文章源自爱尚资源教程网-https://www.23jcw.net/6465.html

2. 使用`threading.enumerate()`方法获取当前所有活动的线程，然后检查目标线程是否在其中。文章源自爱尚资源教程网-https://www.23jcw.net/6465.html

下面是一个示例代码，演示如何使用这两种方法检查线程是否在运行：文章源自爱尚资源教程网-https://www.23jcw.net/6465.html

import threading
import time

def worker():
    print("Worker thread started")
    time.sleep(5)
    print("Worker thread finished")

# 创建两个线程
t1 = threading.Thread(target=worker)
t2 = threading.Thread(target=worker)

# 启动线程
t1.start()
t2.start()

# 检查线程是否在运行
if t1.is_alive():
    print("Thread 1 is running")
else:
    print("Thread 1 is not running")
if t2.is_alive():
    print("Thread 2 is running")
else:
    print("Thread 2 is not running")
# 获取当前所有活动的线程
threads = threading.enumerate()
# 检查目标线程是否在其中
if t1 in threads:
    print("Thread 1 is running")
else:
    print("Thread 1 is not running")
if t2 in threads:
    print("Thread 2 is running")
else:
    print("Thread 2 is not running")
```
输出结果如下：
```
Worker thread started
Worker thread started
Thread 1 is running
Thread 2 is running
Thread 1 is running
Thread 2 is running
Worker thread finished
Worker thread finished

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