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3.6 had a couple of big improvement - f strings, annotation, and if I'm not mistaking, the devs did something to improve the dictionaries; from 3.6 on dicts are

• TkTech 5y ago
  -
  • orf 5y ago
    Ordering was stable within a process (and within a given PYTHONHASHSEED value), but not stable across processes. They are now insertion ordered.
    • TkTech 5y ago
      Thank you for the clarification :)
  • deleted 5y ago
    [deleted]
  • morvita 5y ago
    Order-preserving dicts were added as a side effect of an optimization in CPython 3.6 [0]. They were considered an implementation detail of CPython in 3.6, it wasn't until Python 3.7 that is was declared an official part of the language [1]. [0] https://docs.python.org/3/whatsnew/3.6.html#whatsnew36-compactdict https://docs.python.org/3/whatsnew/3.6.html#whatsnew36-compa... [1] https://mail.python.org/pipermail/python-dev/2017-December/151283.html https://mail.python.org/pipermail/python-dev/2017-December/1...
• ehsankia 5y ago
  Considering the last item in the changelog is: - Add type hinting. https://github.com/pallets/flask/pull/3973 https://github.com/pallets/flask/pull/3973 I think it's fair to assume annotations is the big reason.
  • detaro 5y ago
    Annotations were added in 3.5, so no reason to drop 3.5 for them, and 3.5 support had been dropped from Flask over a year ago.