Apology of the walrus operator

Python walrus operator has been a source of controversy in the community. Let's list a few of its use cases.

Conditions

if (status := subsystem.Something().status).is_success():
    return status

Provide an informative assertion error message in pytest.

def test_something():
    assert (
        response := requests.get(...)
    ).json() == {'foo': 'bar'}, response.text

Linters?

What do we have on linters' front about walrus?