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there were "traits" in python :/ . Search for pyprotocols.

(searching myself.. not much left of it)

2004 - https://simonwillison.net/2004/Mar/23/pyprotocols/

some related rejected PEP .. https://peps.python.org/pep-0246/ talking about something new to be expected.. in 2001?2005?

no idea did it happen and which one would that be..




Possibly Guido, in that rejection, was talking about what ended up as ABCs, original PEP: https://peps.python.org/pep-3119/

Further work was done in this area, building on ABCs, with Protocols, original PEP: https://peps.python.org/pep-0544/




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