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As of Python 3.12, you don’t need separately declared TypeVars with explicit variance specifications, you can use the improved generic type parameter syntax and
by dragonwriter 1y ago
As of Python 3.12, you don’t need separately declared TypeVars with explicit variance specifications, you can use the improved generic type parameter syntax and variance inference.
So, just:
class Indexable[T](Protocol):
def __getitem__(self, i: int,/) -> T: ...
is enough.