Vectorized Encode

encode.py

import numpy as np
import base64
from typing import List

def encode(ord_key: List[int], some_str: str):
  s_len = len(some_str)
  ord_key_remapped = np.resize(ord_key, s_len)
  encoded_str = np.array(list(map(ord, some_str))) + ord_key_remapped % 256
  return base64.urlsafe_b64encode(encoded_str.tostring())

print(encode([1,2,3,4], 'cat attack'))