Summary

From the rule's documentation (PLW0133):

Known problems

This rule only detects built-in exceptions, like ValueError, and does not catch user-defined exceptions.

So currently this is caught:

def foo():
    ValueError("...")

But not this. But I would love if it would, it would have spared me 1hr of debugging this morning :)

class MyCustomError(Exception):
    ...

def foo():
    MyCustomError("...")