Python 3+ has type annotations that can be used for static type checking using a separate program. There are several competing type checkers (mypy, pyright, pyre) that can be used that are sponsored by different companies (Facebook, Microsoft).
- Static types make it easier work on projects sporadically
- TypeScript adds incidental complexity to using libraries, I hope this isn’t the case with Python libraries
- TypeScript was a different approach that required an entirely separate language and compiler