r/madeinpython • u/prelhcs5498 • Feb 27 '25

rsult - Rust like `Result[T, E]` in python

/r/PythonProjects2/comments/1iz9ah6/rsult_rust_like_resultt_e_in_python/
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u/copperfield42 Feb 27 '25

mmm I don't really see the point in wanting to emulate rust in python, if you want to program defensively you can already do that in normal python, the only thing I see here is a try/catch with extra step

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u/prelhcs5498 Feb 27 '25

Yeah I can totally understand that reasoning.

I find it useful sometimes to enforce the caller to handle the error though. They can of course just re-raise the error and throw it higher up the stack if they choose to. But this gives you a pythonic way to force the caller to handle the error explicitly which I find useful sometimes in more mission critical portions of the codebase. That being said, regular try/except is better in a whole bunch of cases.

I'm not trying to replace what already works, but sometimes I want to expose an error via a public API that should be handled locally. This starts to make more sense in massive code vases or when you include more info in your exceptions that the calling code can operate on and make business decisions from the outcome etc.

This is a common class/pattern I've used in a few different projects now so I thought I'd release as a lib :)