sys.gettrace() is not being used anymore

[ar-qun]

Hi there,

While going through the course, I have noticed that the debugging mode in Pycharm doesn't activate the debugging mode in Flask anymore. However, if I replace the code below

htmx-python-course/code/ch4_app/ch4_final_video_collector/app.py

Line 50 in d9cc19e

being_debugged = sys.gettrace() is not None

with

    being_debugged = sys.monitoring.get_tool(sys.monitoring.DEBUGGER_ID) is not None

It now works again.

If maintainers approve of this change I will prepare a PR :) I can also keep it backward compatible.

What do you think?

[mikeckennedy]

Hey, I appreciate you looking into this. I'm running the latest PyCharm available, 2023.3.4, and it works as is.

And for printing it out when running directly (because there are no break points without the debugger):

being_debugged = sys.gettrace() is not None
print(f'{being_debugged=}')

Output:

being_debugged=False

What am I missing here?

[ar-qun]

Probably the Python version then.

After looking into it, it seems that this [1] issue is present in the newest Pycharm versions when using with Python 3.12 due to new monitoring API [2]. I just confirmed that sys.gettrace() works fine in 3.11.

[1] https://stackoverflow.com/questions/77624964/check-if-program-runs-in-debug-mode-in-pycharm-2023
[2] https://blog.jetbrains.com/pycharm/2024/01/new-low-impact-monitoring-api-in-python-3-12/

[mikeckennedy]

I see what I was missing! On Python 3.11 it works fine, but 3.12 it doesn't. I'll get it fixed across the course code samples, thanks!

[mikeckennedy]

Thanks again @ar-qun Should be fixed now.