enums_members error

Enum member annotated with an explicit type

In an Enum class, members should NOT carry explicit type annotations. If an attribute inside an Enum class body has both a type annotation and an assigned value, it is treated as an annotated member — which is an error because the type checker infers a LiteralEnumClass.member type for all members automatically.

A type annotation without an assigned value (e.g. genus: str) is a **non-member attribute** and is valid.

from enum import Enum

class Pet(Enum):
    genus: str           # OK — non-member attribute (annotation only, no value)
    CAT = "felis"        # OK — member without annotation
    DOG: int = 2         # E — member with explicit type annotation

How to handle it

Every rule is on by default — strict is the default, not a cage. You can dial enums_members down per-file or per-path from your editor or pyproject.toml, or fix the code so it type-checks. See the Type System rules and the complete diagnostic reference.

Canonical URL: https://www.basilisk-python.dev/errors/enums_members