Python3.6 AES加密 pycrypto‎ 更新為 pycrypto‎demo | TypeError: Object type cannot be passed to C code

#!/usr/bin/env python
# -*- coding:utf-8 -*-
# @author: rui.xu
# @update: jt.huang
# 這里使用pycrypto‎demo庫
# 安裝方法 pip install pycrypto‎demo

from Crypto.Cipher import AES
from binascii import b2a_hex, a2b_hex


class PrpCrypt(object):
    def __init__(self, key):
        self.key = key.encode('utf-8')
        self.mode = AES.MODE_CBC

    # 加密函數，如果text不足16位就用空格補足為16位，
    # 如果大於16當時不是16的倍數，那就補足為16的倍數。
    def encrypt(self, text):
        text = text.encode('utf-8')
        cryptor = AES.new(self.key, self.mode, b'0000000000000000')
        # 這里密鑰key 長度必須為16（AES-128）,
        # 24（AES-192）,或者32 （AES-256）Bytes 長度
        # 目前AES-128 足夠目前使用
        length = 16
        count = len(text)
        if count < length:
            add = (length - count)
            # \0 backspace
            # text = text + ('\0' * add)
            text = text + ('\0' * add).encode('utf-8')
        elif count > length:
            add = (length - (count % length))
            # text = text + ('\0' * add)
            text = text + ('\0' * add).encode('utf-8')
        self.ciphertext = cryptor.encrypt(text)
        # 因為AES加密時候得到的字符串不一定是ascii字符集的，輸出到終端或者保存時候可能存在問題
        # 所以這里統一把加密后的字符串轉化為16進制字符串
        return b2a_hex(self.ciphertext)

    # 解密后，去掉補足的空格用strip() 去掉
    def decrypt(self, text):
        cryptor = AES.new(self.key, self.mode, b'0000000000000000')
        plain_text = cryptor.decrypt(a2b_hex(text))
        # return plain_text.rstrip('\0')
        return bytes.decode(plain_text).rstrip('\0')


if __name__ == '__main__':
    pc = PrpCrypt('keyskeyskeyskeys')  # 初始化密鑰
    e = pc.encrypt("aaa")  # 加密
    d = pc.decrypt(e)  # 解密
    print("加密:", e)
    print("解密:", d)