Hello Dieter, thanks for your reply.
Am 06.11.2023 19:11 schrieb Dieter Maurer:
One option is a test suite (--> Python's "unittest" package) with a sufficiently high coverage (near 100 %).
Yes, that is the primary goal. But it is far away in the related project.
I got a hint that "pylint" is able to detect problems like this. -- https://mail.python.org/mailman/listinfo/python-list