python 進制轉換

import binascii
import re
from Crypto.Cipher import AES
 
class AESECB:
    def __init__(self):
        self.key = '1394fe38a2f6a7d6'
        self.mode = AES.MODE_ECB
        self.bs = 16  # block size
        self.PADDING = lambda s: s + (self.bs - len(s) % self.bs) * chr(self.bs - len(s) % self.bs)
 
    def encrypt(self, text):
        generator = AES.new(self.key.encode('utf-8'), self.mode)
        crypt = generator.encrypt(self.PADDING(text).encode('utf-8'))
        crypted_str =binascii.b2a_hex(crypt)  
        result = crypted_str.decode()
        return result
 
    def decrypt(self, text):
        generator = AES.new(self.key.encode('utf-8'), self.mode)
        text += (len(text) % 4) * '='
        decrpyt_bytes = binascii.a2b_hex(text)   
        meg = generator.decrypt(decrpyt_bytes)
        # 去除解碼後的非法字符
        try:
            result = re.compile('[\\x00-\\x08\\x0b-\\x0c\\x0e-\\x1f\n\r\t]').sub('', meg.decode())
        except Exception:
            result = '解碼失敗，請重試!'
        return result
 
 
if __name__ == '__main__':
    aes = AESECB()
 
    to_encrypt = 'qwerty'
    to_decrypt = '752b74e1673bcef7cc36e4b61164d1b1'
    print("\n加密前:{0}\n加密後：{1}\n".format(to_encrypt,aes.encrypt(to_encrypt)))
    print("解密前:{0}\n解密後：{1}".format(to_decrypt,aes.decrypt(to_decrypt)))