How can I add type hints to my legacy Python code?

How can I add type hints to my legacy Python code?

You can start by identifying the function signatures and variable types in your code. Then, use the syntax def function_name(param: Type) -> ReturnType: to add type hints.

What if I don't know the types of some variables?

In that case, you can use the Any type from the typing module as a placeholder. This allows you to gradually refine the types later.

Are there tools to help with this process?

Yes, tools like mypy can analyze your code for type hints and help you identify areas that need type annotations.

Can I add type hints to classes and methods too?

Absolutely! You can annotate class attributes and method parameters in a similar way, enhancing the readability and maintainability of your code.