abersheeran

import math
from hashlib import blake2b


class BloomFilter:
    def __init__(self, elements_count: int, *, error_rate: float = 0.0001) -> None:
        byte_count = 1 + int(
            -(math.log(error_rate) / math.log(2) ** 2) * elements_count // 8
        )
        digest_size = int(math.log2(elements_count)) + (elements_count % 2)