TYPE_CHECKING = False and best practice with .pyi file

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1

I have my type annotations in a .pyi. Should I add:

TYPE_CHECKING = False

if TYPE_CHECKING:

and all the contents of the file under the if?

2

No. This is completely pointless in a .pyi file and will probably even break stuff in some type checkers.

3

So .pyi are not evaluated at runtime, but only by type checkers?

4

Yes. That is the entire point of having them be in different files.