thread.is_alive()或thread.isAlive()不工作

Question

我有以下帖子

thread = threading.Thread(target=editing, args=(values['_CHECK_'], files, directory, window, progress_bar,), daemon=True).start()

并希望检查线程是否仍在运行。

if not thread.is_alive()
    pass

或

if not thread.isAlive():
    pass

两者都不起作用。为什么？

例外：

File "Progress.py", line 101, in progress
    if not thread.isAlive():
AttributeError: 'NoneType' object has no attribute 'isAlive'

Answer 1

这是因为start() just Start the thread’s活动并返回None。你可能缩进到写下

>>> thread = threading.Thread(target=editing, args=(values['_CHECK_'], files, directory, window, progress_bar,), daemon=True)
>>> thread.start() # start the thread
>>> is_alive = thread.is_alive()
>>> print(is_alive)