Invalid Named Tuple Override

What it does

Checks for subclass members that override inherited NamedTuple fields.

Why is this bad?

Reusing an inherited NamedTuple field name in a subclass creates a class where tuple indexing and repr() still reflect the original field, while attribute access follows the subclass member.

Default level

This rule is a warning by default because these overrides do not make the class invalid at runtime.

Examples

from typing import NamedTuple


class User(NamedTuple):
    name: str


class Admin(User):
    name = "shadowed"  # error: [invalid-named-tuple-override]


admin = Admin("Alice")
admin.name  # "shadowed"
admin[0]  # "Alice"