do we yield two separate values, or a tuple?

In python you can return/yield only a single object, that can be a tuple of values. (If there is a comma it'a a tuple.)

The description should describe the task.

https://docs.codewars.com/authoring/guidelines/submission-tests

True if n > 0 else False is an unnecessarily complicated version of n > 0.

For consistency, if you wrap a bool expression, you should wrap all expressions:
True if n > 0 else False -> True if (True if n > 0 else False) else False -> ...

And why not (1 if n == 1 else n) > 0 or True if (True if (0 if n == 0 else 1 if n == 1 else n) > 0 else False) else False?

• No sample tests
• No random tests
• Using if-else to solve this kata is very bad practice

• Missing describe/it blocks in both sample and full tests.
• Missing from solution import isemail in both sample and full tests.
• There should be tests with underscores in domain.
• Duplicate?

Description cannot be approved, recent changes from related record must be merged first.

• No sample tests
• No random tests

No sample tests.

Why not?

• backward compatibility
• imports
• error messages

Fixed in last fork.

.

There should be tests with n=0 and n=1.

Reference solution fails when n is a float with an integer value.

Invalid inputs should be removed from description and sample tests.