Why Mac freezes?

kensugi · November 3, 2020, 12:30pm

Hello.

I’m using ROOT 6.22.02 and Python 3.9.0 installed by Homebrew on a macOS 10.15.7 machine.

The mac freezes when I draw a graph by TGraph from a Python script (attachment.py).
When I use TGraph by C++, the script (attachment.cc) can work.

The same script can depict a graph on ROOT 6.20.04 and Python 3.8.

Please give me an advice to use the script on ROOT 6.22.02 and Python 3.9. Thank you.

eguiraud · November 3, 2020, 1:37pm

Hi @kensugi,
and welcome to the ROOT forum.
Does executing the python script with python -i script.py (note the -i) fix the problem?

Cheers,
Enrico

kensugi · November 3, 2020, 1:46pm

Hello, eguiraud.

I try python3 -i script.py.
It can work. But I cannot guess why.

I’d appreciate it if you tell me the reason.

Thank you.

eguiraud · November 3, 2020, 2:00pm

The underlying issue is https://sft.its.cern.ch/jira/browse/ROOT-10787 , PyROOT is not running the graphics event processing loop in the background.

kensugi · November 3, 2020, 2:07pm

I check the website.
Thank you for your cooperation.

system · November 17, 2020, 2:07pm

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