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Python interfaces: abandon ABC and switch to Protocols (levelup.gitconnected.com)
submitted 1 year ago by rwnobrega@lemmy.world to c/python@programming.dev
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[-] plistig@feddit.de 3 points 1 year ago* (last edited 1 year ago)

Abc and Protocols are not the same, though. The protocol is met when all methods are implemented with the expected signature. Abstract base classes require you to opt in to be considered an Implementation of some interface. Both have different use cases. Protocols are much more fragile.

[-] riskable@programming.dev 2 points 1 year ago

I wouldn't say Protocols are more "fragile"... They're more strict.

[-] plistig@feddit.de 1 points 1 year ago

The opposite is true. If you have two interfaces that contain methods with the same name, then they have the same typing.Protocol. It is not possible to specify preconditions or contracts, as you would with abc.

this post was submitted on 13 Jul 2023
11 points (82.4% liked)

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