Threading.isAlive was removed in Python 3.9. Use is_alive.

[tirkarthi]

https://bugzilla.redhat.com/show_bug.cgi?id=1791693

glances/glances/plugins/glances_ports.py

Line 85 in f0e8ef4

thread_is_running = self._thread.isAlive()

Thanks for the library!

[nicolargo]

Corrected by @tirkarthi PR.

Thanks to him.