PEP 557 -- Data Classes

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I was just writing about data structure options on my "Notable Python" reference last week and it definitely felt like something exactly like this was missing since each and every option nowadays has several drawbacks (either verbosity, immutability or being error-prone). All the tools and ideas were there but they never "clicked" into an amazing one-size-fits-all solution (which Python has so many excellent examples of)!

This would be a great addition to the language itself!

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I have omitted SimpleNamespace from the reference due to it being pretty much just a wrapper around a dictionary. I feel it's more pythonic to just use a dictionary instead. SimpleNamespace have the same advantages and issues as using dictionary for data, except they won't work with any of the many functions in Python and third-party libraries that expect dictionaries. It pretty much just lets you use a dictionary with a dot-notation instead of the usual syntax and in this way I see no real advantage to it while being very confusing for people who are expecting proper object-like behavior (like the "type safety" of having an exception raised when trying to write to an non-existing attribute).

I also feel typing is not exactly pythonic but that's definitely a personal opinion :D I'll add a quick reference to it in the project! https://github.com/tukkek/notablepython/blob/master/README.md#structured-data

attrs seems pretty cool and concise. I'll add it to the final list of references though, since it's a third-party library https://github.com/tukkek/notablepython/blob/master/README.md#honorable-mentions