how to Encrypt and Decrypt by AES algorithm in both python and ios xcode -

i have python code encryption aes. i've made compatible with android. googled couldn't fine same solution in ios xcode. big problem deal options padding, hashing key, iv size , mode_cbc. can me?

import base64 import hashlib crypto import random crypto.cipher import aes   class aescipher:      def __init__(self, key):         self.bs = 16         self.key = hashlib.sha256(key.encode()).digest()      def encrypt(self, message):         message = self._pad(message)         iv = random.new().read(aes.block_size)         cipher = aes.new(self.key, aes.mode_cbc, iv)         return base64.b64encode(iv + cipher.encrypt(message)).decode('utf-8')      def decrypt(self, enc):         enc = base64.b64decode(enc)         iv = enc[:aes.block_size]         cipher = aes.new(self.key, aes.mode_cbc, iv)         return self._unpad(cipher.decrypt(enc[aes.block_size:])).decode('utf-8')      def _pad(self, s):         return s + (self.bs - len(s) % self.bs) * chr(self.bs - len(s) % self.bs)      @staticmethod     def _unpad(s):         return s[:-ord(s[len(s)-1:])]    t = aescipher('this key') enc = t.encrypt('hello world') print(enc.decode('utf-8'))    t2 = aescipher('this key') print(t2.decrypt(enc))