Python Domain Skill

Modern Type Hints (3.10+)

# Union with | operator
def process(value: int | str | None) -> dict[str, int]: ...

# Type aliases
type UserID = int
type Config = dict[str, str | int | bool]

# See references/type-hints-advanced.md for:
# - Generics and TypeVars
# - Protocols (structural typing)
# - Function overloading