Previously when discussing asyncio backpressure I've made some claims that were not necessarily complete.

I said:

It works well for 100s of urls but when we hit a big number like 10000s we have a problem.

The program seemingly hangs. This is because all the tasks are being created first …

The python packaging landscape and developer experience has shifted dramatically in the past year or so with uv's launch marked a pivotal moment. But behind the scenes many PEPs have worked to get us to this point.

One such PEP was PEP 723 – Inline script metadata which we discussed …

Feature flags or dynamic configuration is something that I find very useful, however I've never had the chance to use them. This is for a lack of options launchdarkly, flagsmith and unleash to name a few.

SaaS options can be amazing with a full array of features, but I would …

PEP-734 subinterpreters in the stdlib has officially been included in the Python 3.14 as a very late addition. subinterpreters now has a new home in the standard library module called concurrent.interpreters.

If you've been following my blog posts you'll know that I'm particularly excited about this feature.

• How …

Python 3.14 is just around the corner and it's jampacked with huge updates:

• Free threading and multiple interpreters?
• Template strings

But as with any release, there are many nice smaller and less noticeable features. Features you won't see unless you comb through the entire release notes. Luckily I am …

I grew up in both the UK and China. So I'd like to think I have a little understanding of both cultures. China uses both the western gregorian calendar and a version of lunar calendar called 农历. This means I have a Chinese lunar birthday as well as a …

There's mixed feedback to Asyncio in the community. Some people passionately hate it whilst others believe "writing async make program go fast". This debate is way too much for me to cover here right now. Though maybe I'll look at it in the future.

For me I use asyncio a …

Short update since First Look at MCP. Docker has released it's MCP toolkit which includes a catalog of MCP servers as well as helpers to connect to the MCP clients.

It is exceeding easy to use it, docker is registered as a single MCP server for your client. And tools …

Previously I've played with tool calling in Langchain and Python sandboxes. But recently MCP (Model Context Protocol) is front and center. So I tried to create my own github MCP in Python to integrate cursor with the github cli.

What is MCP?

Before we get started, its good to familiarise …

In my posts earlier this year I talked about the parallelism performance on 3.13 free-threaded builds. In particular I looked at solving an advent of code problem. In How free are threads in Python now? I discovered significant performance penalties for using free-threading and a lack of tooling available …