advent22/api/advent22_api/core/sequence_helpers.py

33 lines
883 B
Python

import itertools
import random
from typing import Any, Self, Sequence, TypeVar
from .config import get_config
T = TypeVar("T")
class Random(random.Random):
@classmethod
async def get(cls, bonus_salt: Any = "") -> Self:
cfg = await get_config()
return cls(f"{cfg.puzzle.solution}{cfg.puzzle.random_seed}{bonus_salt}")
def shuffled(self, population: Sequence[T]) -> Sequence[T]:
return self.sample(population, k=len(population))
async def shuffle(seq: Sequence, rnd: random.Random | None = None) -> list:
# Zufallsgenerator
rnd = rnd or await Random.get()
# Elemente mischen
return rnd.sample(seq, len(seq))
def set_len(seq: Sequence, length: int) -> list:
# `seq` unendlich wiederholen
infinite = itertools.cycle(seq)
# Die ersten `length` einträge nehmen
return list(itertools.islice(infinite, length))