Python Protocols

Links: 108 Python Index

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Protocols

• Can not adapt type hints of imported code.
• ABCs (Abstract base classes) are classes that we can inherit from but they CANNOT be instantiated.
  • They are used to define the interface of what subclasses should look like.
• The problem with this approach was that any external classes that didn't inherit abstract base classes were not of that type.
• This problem was solved by protocol.
  • If a class implements all the methods of a protocol class then it is automatically of that type (for static type checking and not at runtime).

References

• Protocols in Python: Why You Need Them - presented by Rogier van der Geer - YouTube

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Last updated: 2022-12-18