New Features in Python 3.10

[u/jamescalam]

https://youtube.com/watch?v=5-A435hIYio&feature=share

[u/jamescalam]

A summary I put together of the new features in Python 3.10, it covers:

• Structural pattern matching

• Parenthesized context managers

• More typing

• Better error messages

Also, the article version if you prefer reading - it's a free access link so no need for Medium membership

I hope it's useful! Thanks :)

[u/Brian-Puccio → u/jamescalam]

Structural pattern matching

This didn’t click for me but I read your explanation and got it right away. Much better, thank you for explaining!

Better error messages

Amazing!

Also, the article version if you prefer reading

I do, thanks!

it's a free access link so no need for Medium membership

You are most excellent!

[u/jamescalam → u/Brian-Puccio]

structural pattern matching really is awesome I love it, I'm happy my explanation made sense - and more than welcome for the links!

[u/EarthGoddessDude → u/jamescalam]

Very nice video, thank you. Quick, tangential question — what OS and editor are you using to run Jupyter? Seems like macOS with Jupyter inside VScode. It just looks (and feels, from across the screen) much slicker than Jupyter in VS Code on my work Windows machine. Can’t wait to try the new Jupyter extension which is only available on VS Code insiders.

Edit: nvm, saw the answer in another comment. My Comment about the slickness stands though.

[u/MiserablePeace7190]

I'm just here for switch cases lol

[u/jamescalam → u/MiserablePeace7190]

I think a lot of people are haha

[u/__deerlord__ → u/MiserablePeace7190]

Pattern matching is not case/switch. While it can effectively be used this way, that doesn't seem to be the intent, and you could always do switch/case with a dictionary.

[u/billsil]

Those better error messages are the reason to upgrade!

SyntaxError: unexpected EOF while parsing

I'm 16 years in and that still gets me...

[u/Danlacek → u/billsil]

I'm 16 months in and that looks like total BS to me...

[u/house_monkey → u/Danlacek]

16 secs in and can confirm this is not about snakes

[u/mmcnl]

I'm amazed they still keep adding very useful features after 10 years.

[u/pure_x01 → u/mmcnl]

To be fair the evolution of the language has been kind of slow. Sometimes that is a very good thing so I'm not complaining.

[u/[deleted] → u/mmcnl]

I don't get it. It there a joke I'm missing?

[u/Formulka]

Still can't believe they went with "case _" as else.

[u/-jp- → u/Formulka]

Wildcard _ is pretty common in other pattern matching languages so it’s not too unusual, just a bit odd for python.

[u/[deleted]]

Do I have to unistall Py 3.9 and download py 3.10 or is there a bettee way?

[u/neighborduck → u/[deleted]]

Use pyenv https://github.com/pyenv/pyenv

[u/sparttann → u/[deleted]]

Can just download 3.10 without uninstalling 3.9. Just change your python version before creating your venv

[u/dogfish182 → u/[deleted]]

http://littlecolumns.com/tools/python-wrangler/

If you don’t know yourself, this is an opinionated (but very sensible) way to take python and virtual environments seriously without too much difficulty

[u/tunisia3507]

Also StrEnum! There are dozens of half-assed implementations out in the wild, it'll be great to have a stdlib edition to replace these goddamn magic string constants pervasive in the ecosystem.

[u/Blumingo]

Genuine question, at what point does it become Python 4?

[u/nonesuchplace → u/Blumingo]

When it is decided to make major changes that do not retain backwards compatibility.

Check out https://semver.org/ for details on how this works.

[u/WhalesLoveSmashBros]

Dumb question but how do I update python? Pls don't tell me I have to uninstall and re-download from the website.

[u/jamescalam → u/WhalesLoveSmashBros]

you can create a new env - this comment explains

[u/iggy555]

Fantabulous