What’s in which Python 3.7–3.9?

Monday 17 May 2021

This is the fourth in a series of summarizations of what’s in each release of Python. The first three were:

Update: I’ve now collected all the “What’s in which Python”s onto a single page: What’s in which Python.

3.7: June 27, 2018

  • postponed evaluation of type annotations (PEP 563)
  • async and await are keywords
  • dataclasses
  • dict order is guaranteed

Full list of 3.7 changes.

3.8: October 14, 2019

  • assignment expressions (walrus operator := )
  • f-string “=” specifier
  • positional-only parameters

Full list of 3.8 changes.

3.9: October 5, 2020

  • dict union operators
  • type hinting generics in standard collections
  • relaxed decorator syntax
  • str.removeprefix and str.removesuffix

Full list of 3.9 changes.


Did not know i needed this...thanks

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