[issue33777] dummy_threading: .is_alive method returns True after execution has completed
Nate Atkinson added the comment:
To be clear-- is_alive() doesn't *always* return True. It returns True until
.join() is called.
Python 3.6.7 (default, Oct 22 2018, 11:32:17)
[GCC 8.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from dummy_threading import Thread
>>> def f(): print('foo')
...
>>> t = Thread(target=f)
>>> t.start()
foo
>>> t.is_alive()
True
>>> t.join()
>>> t.is_alive()
False
I would expect is_alive to return True while the target function is executing
and return False after the execution has completed. Instead, .is_alive is
continuing to return True after execution of the target function has completed.
--
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[issue33777] dummy_threading: .is_alive method returns True after execution has completed
Nate Atkinson added the comment: I notice that I maybe have inadvertently assigned this to the wrong group. I suspect that this should apply to the "Library" rather than "Core". Sorry! -- ___ Python tracker <https://bugs.python.org/issue33777> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue33777] dummy_threading: .is_alive method returns True after execution has completed
New submission from Nate Atkinson :
Here's what I expect to happen (Python2 behavior):
Python 2.7.14+ (default, Dec 5 2017, 15:17:02)
[GCC 7.2.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from dummy_threading import Thread
>>> def f(): print 'foo'
...
>>> t = Thread(target=f)
>>> t.start()
foo
>>> t.is_alive()
False
>>>
Here's what actually happens (Python3.6):
Python 3.6.4 (default, Jan 5 2018, 02:13:53)
[GCC 7.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from dummy_threading import Thread
>>> def f(): print('foo')
...
>>> t = Thread(target=f)
>>> t.start()
foo
>>> t.is_alive()
True
>>>
After completion of the target function, I would expect .is_alive() to return
False for an instance of dummy_thread.Thread. Instead, it returns True until
the .join() method of the instance of dummy_thread.Thread is called.
--
components: Interpreter Core
messages: 318795
nosy: njatkinson
priority: normal
severity: normal
status: open
title: dummy_threading: .is_alive method returns True after execution has
completed
type: behavior
versions: Python 3.6
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