What's new in Python 3.13?

The Python 3.13 beta has been released, meaning the feature freeze is now active. This is the perfect time to take a minute to see what's new and upcoming in the release, so let's dive into it!

Below is a list of chapters cited against any relevant references which you'll find further down. It's absolutely worth doing further reading using these if you want to learn more!

Chapters:
0:00 - Intro
0:30 - JIT compilation [1-3]
1:29 - Adding iOS as a supported platform [4-5]
1:49 - Improved error messages [6-7]
2:11 - Marking deprecations using the type system [8]
2:30 - Deferred evaluation of annotations using descriptors [9-10]
3:17 - Narrowing types with TypeIs [11]
3:52 - Things no longer coming to 3.13 [12-13]
4:06 - Quickfire cool stuff! [14]
4:42 - Outro

References:
[1] https://peps.python.org/pep-0744
[2] https://tonybaloney.github.io/posts/p...
[3] https://dl.acm.org/doi/10.1145/3485513
[4] https://peps.python.org/pep-0730
[5] https://peps.python.org/pep-0738
[6]    • Python now has COLOURED tracebacks  
[7] https://docs.python.org/3.13/whatsnew...
[8] https://github.com/python/cpython/blo...
[9] https://peps.python.org/pep-0563
[10] https://peps.python.org/pep-0649
[11] https://peps.python.org/pep-0742
[12] https://peps.python.org/pep-0734
[13] https://peps.python.org/pep-0712
[14] https://docs.python.org/3.13/whatsnew...

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