How can I check if the Main Thread is alive from another ( non-daemon, child ) thread?
The child thread is a non-daemon thread and I'd like to check if the Main thread is still running or not, and stop this non-daemon thread based on the result.
( Making the thread daemon is not good for my situation because my thread writes to stdout
which creates problems when the thread is set as a daemon)
Using python 2.7
For Python 2.7 you can try this:
for i in threading.enumerate():
if i.name == "MainThread":
print i.is_alive()
The usage of lower camel case in function names is deprecated and so you should be using i.is_alive()
instead of i.isAlive()
.
If you like one-liners try this:
is_main_thread_active = lambda : any((i.name == "MainThread") and i.is_alive() for i in threading.enumerate())
Then call is_main_thread_active()
to check if the Main Thread is active.
For one time use, however, you could use this directly without creating a function.
any((i.name == "MainThread") and i.is_alive() for i in threading.enumerate())
Check this page for more info about threading.
In python 3.4 a dedicated function to return the main thread exists and so you can use this one liner to see if your main thread is still alive..
threading.main_thread().is_alive()
Hope this helps you.
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With