Described fully in pylint-dev/pylint#10867, which was closed due to dependency on isrot, so I am writing directly here.

from compression import zstd
from typing import Optional
from unittest.mock import Mock


def main():
    print("Hello from python3-14!")


if __name__ == "__main__":
    main()

run command:
uv run isort
And result is in wrong order, as from compression import zstd is treated as third party:

from typing import Optional
from unittest.mock import Mock

import numpy as np
from compression import zstd

I would like to see a fix, in which it is treaded as first party import as it is standard library in python 3.14