Python: Data Classes with the dataclasses Module

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About Course

Write cleaner Python classes for holding data. The @dataclass decorator generates __init__, __repr__ and __eq__ for you. Learn defaults, field(default_factory=…), frozen and ordered classes, __post_init__ validation and converting to dictionaries.

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?

  • Create data classes that write their own __init__, __repr__ and __eq__
  • Set safe defaults, including lists, with default_factory
  • Make immutable or sortable classes with frozen and order
  • Add validation in __post_init__ and convert objects with asdict()

Course Content

Course Lessons

  • Why data classes?
  • Defaults, mutable values and options
  • Validation, conversion and when to use something else

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

Final Assessment

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