Python：线程是否仍在运行

Question

如何查看线程是否已完成？ 我尝试了以下操作，但即使我知道线程仍在运行，threads_list 也不包含已启动的线程。

import thread
import threading

id1 = thread.start_new_thread(my_function, ())
#wait some time
threads_list = threading.enumerate()
# Want to know if my_function() that was called by thread id1 has returned 

def my_function()
    #do stuff
    return

Answer 1

关键是使用线程启动线程，而不是线程：

t1 = threading.Thread(target=my_function, args=())
t1.start()

然后使用

z = t1.is_alive()
# Changed from t1.isAlive() based on comment. I guess it would depend on your version.

要么

l = threading.enumerate()

您还可以使用 join()：

t1 = threading.Thread(target=my_function, args=())
t1.start()
t1.join()
# Will only get to here once t1 has returned.

Answer 2

您必须使用threading来启动threading 。

id1 = threading.Thread(target = my_function)
id1.start()

如上所述，如果您没有任何args可提及，您可以将其留空。

要检查您的线程是否is_alive()活动状态，您可以使用is_alive()

if id1.is_alive():
   print("Is Alive")
else:
   print("Dead")

注意：不推荐使用isAlive()而是根据 python 文档使用is_alive() 。

Python 文档

Answer 3

这是我的代码，这不是你问的，但也许你会发现它很有用

import time
import logging
import threading

def isTreadAlive():
  for t in threads:
    if t.isAlive():
      return 1
  return 0


# main loop for all object in Array 

threads = []

logging.info('**************START**************')

for object in Array:
  t= threading.Thread(target=my_function,args=(object,))
  threads.append(t)
  t.start()

flag =1
while (flag):
  time.sleep(0.5)
  flag = isTreadAlive()

logging.info('**************END**************')