Thread by @aureliengeron

My favorite Python 3.5 feature: the matrix multiplication operator @
👇Python features thread👇

Other Python 3.5 features I often use:
- subprocess.run()
- math.isclose()

Big 3.5 features I don't really use much:
- Coroutines with async and await
- Type hints
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My favorite 3.6 feature: formatted string literals
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Other 3.6 features I often use:

- Underscores in numeric literals like 1_000_000
- random.choices()
- math.tau to replace 2 * math.pi (obviously)
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My favorite 3.7 feature: dataclasses
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Other 3.7 feature I really like:

Legacy C locale coercion (PEP 538): locale-aware C extensions and child processes now use UTF-8 by default, rather than ASCII.
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My favorite 3.8 feature: self-doc strings

Other 3.8 features I really like:

- from math import prod, dist, comb, perm
- functools.cached_property

I might start using the walrus operator as well:
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Not sure I'll often use positional-only arguments, but okay, why not:
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My favorite 3.9 feature: removing prefixes and suffixes. I know it sounds silly, but this is needed so often!
And the new syntax to merge dicts is nice too.
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My favorite 3.10 feature: better error messages, including more precise error line numbers.
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I'm not sure I'll use the new match/case feature from 3.10, though:
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Pros:
- it's elegant in some cases

Cons:
- more to learn, harder for beginners
- unusual semantics: case args act a bit like function args, but they outlive the match/case
- goes against the "one-way to do things" principle
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"If you don't like it, just don't use it" is not a valid argument unless you always work alone, and you never read anyone else's code.
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So many great improvements, it's nice to see Python continue to improve! 🐍💕
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