implement bloom filter by python3

bloom_filter.py

import functools

class BloomFilter:
  def __init__(self, filter_size):
    self.filter_size = filter_size
    self.bloom_filter = [0 for _ in range(filter_size)]
  
  def exist_v(self, val):
    indexes = self.n_hash(val)
    for index in indexes:
      if self.bloom_filter[index] == 0:
        return False
      return True
  
  def set_v(self, val):
    indexes = self.n_hash(val)
    for index in indexes:
      self.bloom_filter[index] = 1
  
  def n_hash(self, val):
    hashed = abs(hash(val))
    d_list =  [int(n) for n in str(hashed)]
    return [
      self._hash_common(lambda acc, d: acc + d, d_list),
      self._hash_common(lambda acc, d: acc + 2 * d, d_list),
    ]
  
  def _hash_common(self, func, d_lst):
    execed = abs(functools.reduce(func, d_lst, 0))
    while execed >= self.filter_size:
      execed = execed / self.filter_size
    return int(execed)