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Protocols in Python (til.simonwillison.net)
submitted 1 year ago by rglullis@communick.news to c/python@programming.dev
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[-] lysdexic@programming.dev 1 points 1 year ago

I already explained it to you: protocols apply to types you do not own or control, let alone can specify a base class.

You just specify a protocol, specify that a function requires it, and afterwards you can pass anything to it as-is and you'll be able to validate your calls.

[-] o11c@programming.dev 1 points 1 year ago

and I already explained that Union is a thing.

[-] lysdexic@programming.dev 1 points 1 year ago* (last edited 1 year ago)

I'm not sure you understand that what a union does or does not do is completely irrelevant and besides the point. Python's protocols add support for structural subtyping, and enable both runtime and build-time type checks without requiring major code changes. Don't you understand what that means?

this post was submitted on 26 Jul 2023
12 points (100.0% liked)

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