Improve Generics docs page #14587
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Improve Generics docs page #14587
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hauntsaninja
commented
Feb 2, 2023
| s = 'some string' | ||
| Box[int](s) # Type error | ||
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| Generic class internals |
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This is moved to the bottom, since it's not the most immediately useful
| @@ -478,6 +438,45 @@ type variables defined with special keyword arguments ``covariant`` or | |||
| my_box = Box(Cat()) | |||
| look_into(my_box) # OK, but mypy would complain here for an invariant type | |||
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| .. _type-variable-upper-bound: | |||
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I move upper bounded type vars before value restricted type vars because they're more useful and easier to understand
| @@ -806,20 +804,18 @@ variable is invariant: | |||
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| .. code-block:: python | |||
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| from typing import TypeVar | |||
| from typing_extensions import Protocol | |||
| from typing import Protocol, TypeVar | |||
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I would leave this be since we still support 3.7 which doesn't have typing.Protocol.
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I fixed the ParamSpec / Concatenate imports, but didn't change the Protocol one back as per my comment in #14584 (comment) (Lol, I think mypy will also happily type check this example even on 3.7 because of how magical Protocol is) |
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Linking #13681