This isn’t. They actually fixed that bug. Then they changed their minds and backed the fix back out again because they don’t think you should write Python that way:

> I think EAFP is a very unfortunate and ill-advised practice.

They want you to not write the idiomatic Python:

    try:
        foo = bar["baz"]["qux"]
        ...
    except KeyError:
        ...

…and instead write the non-idiomatic version:

    if "baz" in bar and "qux" in bar["baz"]:
        foo = bar["baz"]["qux"]
        ...
    else:
        ...

If this were a linter then I would accept that it is going to be opinionated. But this is not a linter, it’s a type checker. Their opinions about EAFP are irrelevant. That’s idiomatic Python.