Track 5 · Lesson 7 of 12

Docstrings and type hints

Document what a function does with a docstring and what it expects and returns with type hints.

You will be able to

• Write a docstring that says what a function does, what it takes and what it returns
• Read a function's documentation with help() and __doc__
• Annotate parameters and return values with basic type hints such as int, str, float, bool, list[int] and None
• Explain that Python does not enforce type hints at run time