> Writing type hinted python in Pycharm or Ipython feels like racing in a sports car. Without it, feels like stop and go traffic with the occasional car acciden

> Writing type hinted python in Pycharm or Ipython feels like racing in a sports car. Without it, feels like stop and go traffic with the occasional car accident. This is a beautiful analogy! As for the second part, though, I would say that even if your IDE does not provide automatic type checking, type hints will still add some benefit because: - without type hints you have to do all type checking in your head (across all stack frames). - whereas with type hints you only need to do type checking down to the first level of the stack. To illustrate what I mean, consider the following code: def bar(param1, param2): ... # Some complicated code from which it is not immediately clear what values are allowed for param1 and param2, nor what the return type of the function is. def foo(param): return bar(param, param2="some default value") foo("something something") Now, in order to verify that `foo("something something")` is correct, you have to manually look at foo() and then at bar(). Needless to say, this adds a lot of mental overhead to the game. If we added type hints to both foo() and bar(), however, you would only have to check the signature foo() – which, even in IDEs without type checking, usually amounts to hovering over `foo("something something")`.