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Summary of Major Changes Between Python Versions

A quick reference for the major changes introduced with each new version of Python.

This can help with taking advantages of using new features as you upgrade your code base, or ensuring that you have the correct guards for compatibility with older versions. Type checkers can then enforce that sensitive functions, such as those that execute SQL statements or shell commands, are called only with static arguments, providing protection against injection attacks. The presence of@dataclass_transform() tells a static type checker that the decorated object performs runtime “magic” that transforms a class, giving it dataclass-like behaviors.

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