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  • in Python
  • 10 min read

Pydantic series

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The focus in this blog is on validation, as well as being able to return the same output as we got the input. Which is a json format. As an example, when parsing an IP address as a string, the output value should be a string again and not an ipaddress object. Or the MAC address which needs to retain a certain format.

The "bonus" of also dumping it back into json, is that a diff can be done between the original and the output to see if anything was changed or missed.

This is based on a series that I did on LinkedIn.

  • in Python
  • 2 min read

Convert poetry to uv

poetry2uv When I encountered #uv I fell for it right away. I was already using ruff for a while and started looking into rye, which was the intermediate step before it became uv.

Creating a uv repo is easy, just run uv init $project and you are off to the races. Using it for new projects is easy if you are already used to poetry. The commands are quite similar. Just add a few libraries with uv add $library or uv add --dev $library to make it part of the development group.

  • in Python
  • 2 min read

Improved shebang for your python standalone script

uv shebang

Sometimes you just want a script, without having to specify a virtualenv or polluting your global python environment. Given PEP-0723 we can build scripts as we would normally, though now add a few comments to it to specify the dependencies.

When we combine that with uv we can easily run the script without having to activate a virtualenv or specify the python interpreter. And it will just take care of it. Assume the script has the name script.py we would call it with uv run -s script.py.

  • in Python
  • 5 min read

Pypi Trusted Publisher Management and pitfalls

security pipeline Be the cool kid on pypi, I thought, use the Trusted Publisher Management and OpenID Connect (OIDC)... I thought...

While working on my latest repo convert_poetry2uv, I wanted to automatically push the builds to pypi. Traditionally a username/password combination was used, which was later replaced by an API token. These days OIDC can be used, which I tried. I'm here to share some pitfalls, so hopefully you don't fall in them.