Python Language Reference

The Python Language Reference is the official, authoritative specification of the Python programming language.

Python 3.5.0 was released in September 2015. It introduced the following new language features:

  • coroutines with async and await syntax
  • a new matrix multiplication operator: a @ b
  • additional unpacking generalizations

See What’s New In Python 3.5 for more details.

Read the Authoritative Specification

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