E722 BaseException should also be considered as bare except

[typenoob]

Summary

According to the document,

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.

A bare except is equal with catching BaseException explicitly.
Therefore we should report the following snippets as well.

try:
    pass
except BaseException:
    pass

Does it make sense?

[amyreese]

Seems like a reasonable thing to catch, IMO.

[ntBre]

I think blind-except (BLE001) is meant to catch this case. We should probably cross-link between the two rules at least.

[typenoob]

BLE001 also catches the except Exception: which conflicts with the E722's suggestion.

If you actually need to catch an unknown error, use Exception which will catch regular program errors but not important system
exceptions.

def run_a_function(some_other_fn):
   try:
       some_other_fn()
   except Exception as e:
       print(f"How exceptional! {e}")