from __future__ import annotations

import random
from typing import Any, Protocol, Sequence


class Rng(Protocol):
    def random(self) -> float: ...

    def choices(
        self,
        population: Sequence[Any],
        weights: Sequence[float] | None = None,
        *,
        k: int = 1,
    ) -> list[Any]: ...


def system_rng() -> random.SystemRandom:
    return random.SystemRandom()


def seeded_rng(seed: int | str | bytes | bytearray) -> random.Random:
    return random.Random(seed)