Simon Willison’s Weblog

PEP 554 – Multiple Interpreters in the Stdlib: Shared data (via) Python 3.12 hopes to introduce multiple interpreters as part of the Python standard library, so Python code will be able to launch subinterpreters, each with their own independent GIL. This will allow Python code to execute on multiple CPU cores at the same time while ensuring existing code (and C modules) that rely on the GIL continue to work.

The obvious question here is how data will be shared between those interpreters. This PEP proposes a channels mechanism, where channels can be used to send just basic Python types between interpreters: None, bytes, str, int and channels themselves (I wonder why not floats?) # 20th September 2022, 1:25 am

Deploying Python web apps as AWS Lambda functions. After literally years of failed half-hearted attempts, I finally managed to deploy an ASGI Python web application (Datasette) to an AWS Lambda function! Here are my extensive notes. # 19th September 2022, 4:05 am

APSW is now available on PyPI. News I missed from June: the venerable (17+ years old) APSW SQLite library for Python is now officially available on PyPI as a set of wheels, built using cibuildwheel. This is a really big deal: APSW is an extremely well maintained library which exposes way more low-level SQLite functionality than the standard library’s sqlite3 module, and to-date one of the only disadvantages of using it was the need to install it independently of PyPI. Now you can just run “pip install apsw”. # 15th September 2022, 10:18 pm

TIL: You Can Build Portable Binaries of Python Applications (via) Hynek Schlawack on the brilliant PyOxidizer by Gregory Szorc. # 7th September 2022, 9:41 pm

Should You Use Upper Bound Version Constraints? (via) Should you pin your library's dependencies using "click>=7,<8" or "click~=7.0"? Henry Schreiner's short answer is no, and his long answer is an exhaustive essay covering every conceivable aspect of this thorny Python packaging problem. # 5th September 2022, 5:42 pm