Python lint: Use flake8 --extend-ignore instead of --ignore

[cclauss]

Related to

• Python lint: Upgrade to flake8=7.1.1 #1497

After re-reading the flake8 configuration docs, I remembered that using flake8 --extend-ignore instead of --ignore greatly reduces the number of active lint rules.

[sbc100]

When we are trying to catch everything, why not use the shorter form?

[cclauss]

% ruff rule E722

Why is this bad?

A bare except catches BaseException which includes KeyboardInterrupt, SystemExit, Exception, and others. Catching BaseException can make it hard to interrupt the program (e.g., with Ctrl-C) and can disguise other problems.

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https://peps.python.org/pep-0008/#programming-recommendations

When catching exceptions, mention specific exceptions whenever possible instead of using a bare except: clause:

try:
    import platform_specific_module
except ImportError:
    platform_specific_module = None

A bare except: clause will catch SystemExit and KeyboardInterrupt exceptions, making it harder to interrupt a program with Control-C, and can disguise other problems. If you want to catch all exceptions that signal program errors, use except Exception: (bare except is equivalent to except BaseException:).

A good rule of thumb is to limit use of bare ‘except’ clauses to two cases:

• If the exception handler will be printing out or logging the traceback; at least the user will be aware that an error has occurred.
• If the code needs to do some cleanup work, but then lets the exception propagate upwards with raise. try...finally can be a better way to handle this case.

[sbc100]

Ah yes we don't want to catch KeyboardInterrupt here I guess

[sbc100]

This wasn't needed before?