I'm curious about the logic for this reformatting. Why the separation and parenthesis? It doesn't seem to apply when the names aren't prefixed with _.

Seems it is reserved for things like argh as argh.

@jorenham Could you explain again why doing import x as x is useful.

See unused-import (F401):

If an import statement is used to re-export a symbol as part of a module's public interface, consider using a "redundant" import alias, which instructs Ruff (and other tools) to respect the re-export, and avoid marking it as unused, as in:

from module import member as member

Alternatively, you can use __all__ to declare a symbol as part of the module's interface, as in:

# __init__.py
import some_module

__all__ = ["some_module"]