What is the purpose of Python’s __buffer__ protocol (PEP 688, Python 3.12) and the Buffer abstract base class?

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What is the purpose of Python’s __buffer__ protocol (PEP 688, Python 3.12) and the Buffer abstract base class?

Key points

  • The __buffer__ protocol introduces a method to return a memoryview
  • Type checkers can verify buffer-supporting objects using this protocol
  • This protocol is defined in PEP 688 for Python 3.12
  • Buffer abstract base class helps in implementing buffer protocol

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