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today I show a cool technique for regex replacement in today I go over all the tools I use to set up my projects, as well as the differences between 1-file libraries, multi-file libraries, and ... today I show how to use importlib.metadata + setuptools entrypoints to build a small plugin system! playlist: ... we talked about decorators before but I didn't show how to write a class decorator (or how it works)! - decorators: ... today I talk about wheels, what the filename means, how they're built, what the format looks like, and how to install them! - what is ... today I talk about how to declare optional dependencies in the packages you're providing as well as how to install optional ...
probably the most asked question on my channel -- what are those funny @ signs! I today I show an end-to-end example of writing a code formatter similar to the ones I've written (pyupgrade / add-trailing-comma ... today I talk about `repr`, what it is, and how to implement `__repr__` for your own classes! playlist: ... oops spoiler in the thumbnail it's str.partition, oh well -- I today I talk about tracebacks! how to read them, why today I build a flake8 plugin from scratch showing the bare minimum to add a new lint check! I also demo all the related tools I use ...

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today I talk about Optional and a few approaches to typing the return value of `re.match` (which returns an Optional[Match[str]])! today I talk about the addition of `typing.Self` in python3.11 and why it's useful as well as several workarounds for older today I build a sample cffi library, wrapping the `uuid` system module! cffi is a performant alternative to writing error-prone C ...
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Last Updated: June 6, 2026
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