Sounds like a good rationalization. I really think it's hinting for an IDE so that it knows where and when UDTs are used. The cool thing about python is that t

Sounds like a good rationalization. I really think it's hinting for an IDE so that it knows where and when UDTs are used. The cool thing about python is that the stdlib is readily memorizable. It's a little idiomatic, but it's relatively small. The onus is on the IDE--if you want one--to be smart. Type hinting probably doesn't catch many bugs, especially with metaprogramming, but it might add some value to large codebases or team development.