from typing import Sequence, Callable, TypeAlias

measurement: Sequence[int | float] = [12.5, 11, 12.3, 11.6, 11.1, 12]


def avg(values: Sequence[int | float]) -> float:
    return sum(values) / len(values)


avg: Callable[[Sequence[int | float]], float] = \
    lambda values: sum(values) / len(values)

Scale: TypeAlias = Sequence[int | float]

avg: Callable[[Scale], float] = \
    lambda v: sum(v) / len(v) if len(v) > 0 else 0.0