Python 3.12

#1

Post by qsort » Mon, Oct 02, 2023, 1:01 PM UTC

Python 3.12
python.org

Re: Python 3.12

#2

Post by bloopernova » Mon, Oct 02, 2023, 1:19 PM UTC

What's new: https://docs.python.org/dev/whatsnew/3.12.html

Summary, sorry for poor formatting, I'm not sure HN can do a list of any kind?

New features

More flexible f-string parsing, allowing many things previously disallowed (PEP 701).

Support for the buffer protocol in Python code (PEP 688).

A new debugging/profiling API (PEP 669).

Support for isolated subinterpreters with separate Global Interpreter Locks (PEP 684).

Even more improved error messages. More exceptions potentially caused by typos now make suggestions to the user.

Support for the Linux perf profiler to report Python function names in traces.

Many large and small performance improvements (like PEP 709 and support for the BOLT binary optimizer), delivering an estimated 5% overall performance improvement.

Type annotations

New type annotation syntax for generic classes (PEP 695).

New override decorator for methods (PEP 698).

Deprecations

The deprecated wstr and wstr_length members of the C implementation of unicode objects were removed, per PEP 623.

In the unittest module, a number of long deprecated methods and classes were removed. (They had been deprecated since Python 3.1 or 3.2).

The deprecated smtpd and distutils modules have been removed (see PEP 594 and PEP 632. The setuptools package continues to provide the distutils module.

A number of other old, broken and deprecated functions, classes and methods have been removed.

Invalid backslash escape sequences in strings now warn with SyntaxWarning instead of DeprecationWarning, making them more visible. (They will become syntax errors in the future.)

The internal representation of integers has changed in preparation for performance enhancements. (This should not affect most users as it is an internal detail, but it may cause problems for Cython-generated code.)

Re: Python 3.12

#3

Post by lcenjoyer » Mon, Oct 02, 2023, 1:21 PM UTC

Thank god for type aliases

Re: Python 3.12

#4

Post by bluish29 » Mon, Oct 02, 2023, 1:23 PM UTC

I think the support for isolated sub-interpreters with separate Global Interpreter Locks is the most interesting new feature in python. It is doubtful not the best way to offer some sort of concurrency but still a step closer to maybe one day get rid of GILs.

Re: Python 3.12

#5

Post by Alosra » Mon, Oct 02, 2023, 1:23 PM UTC

Everything aside, I enjoyed the "And now for something completely different" part.

Re: Python 3.12

#6

Post by thatxliner » Mon, Oct 02, 2023, 1:24 PM UTC

Yay new generic syntax…

Re: Python 3.12

#7

Post by Jean-Papoulos » Mon, Oct 02, 2023, 1:24 PM UTC

Holy shit, actual multithreading. Never thought I'd see the day, good on the Python team for making such great improvements.

Re: Python 3.12

#8

Post by thanatropism » Mon, Oct 02, 2023, 1:24 PM UTC

bloopernova wrote: post #2

What's new: https://docs.python.org/dev/whatsnew/3.12.html Summary, sorry for poor formatting, I'm not sure HN can do a list of any kind? New features More flexible f-string parsing, allowing many things previously disallowed (PEP 701). Support for the buffer protocol in Python code (PEP 688). A new debugging/profiling API (PEP 669). Support for isolated subinterpreters with separate Global Interpreter Locks (PEP 684…

What are the advantage of Cython over something like C++ with pybind11 or whatever the equivalent in Rustland?

Re: Python 3.12

#9

Post by zozbot234 » Mon, Oct 02, 2023, 1:24 PM UTC

Wait, what happened to Python 3.11 for Workgroups? Something's not right here.

Re: Python 3.12

#10

Post by Leynos » Mon, Oct 02, 2023, 1:24 PM UTC

lcenjoyer wrote: post #3

Thank god for type aliases

Yeah, outside of the sub-interpreters work, this is probably the change I am most happy about.