Python: Type Hints and the typing Module

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About Course

Learn how to add type hints to Python functions and variables, how to read common hints such as list[str], int | None and Callable, and how a type checker such as mypy uses them to catch bugs before your code runs.

Tutwoo is an independent learning provider. This course is general training based on the official Python documentation. It is not produced or endorsed by the Python Software Foundation and is not an accredited qualification.

© 2026 Tutwoo UK Limited. This course was created in-house by Tutwoo and is our original work. It is for your own learning only: please do not copy, share, record or resell it.

What Will You Learn?

  • Write clear type hints for functions, variables and collections
  • Use modern syntax such as list[int] and int | None correctly
  • Understand what Python does (and does not do) with hints at runtime
  • Run a static type checker and fix the errors it reports

Course Content

Course Lessons

  • What type hints are and why they help
  • Common hints: collections, None, unions and callables
  • Running a type checker and adopting hints gradually

Sources & Further Reading
The official guidance this course is based on.

Final Assessment

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