AES python

#pip install pycryptodome

import binascii
from Crypto.Cipher import AES

def _unpad_string(in_string):
    in_len = len(in_string)
    pad_size = ord(in_string[-1])
    if pad_size > 16:
        raise ValueError('Input is not padded or padding is corrupt')
    return in_string[:in_len - pad_size]

def decrypt(in_encrypted, in_key, in_iv):
    key = binascii.a2b_hex(in_key)
    iv = binascii.a2b_hex(in_iv)
    aes = AES.new(key, AES.MODE_CBC, iv)

    decrypted = aes.decrypt(binascii.a2b_base64(in_encrypted).rstrip())
    return decrypted

if __name__ == '__main__':
    iv = "31333537393234363830363534333231"
    key = "8148bd29ecfebd2755d382bd4d47bad624e479d7caa656c7da2880ec307d9f29"
    data_enc = "GBzTCTfVuERNzjTpr82FR8TfC0E+TtpQzLwf+A9Nd3rvrk0BsezclxzPA2uoPx3i8/su7/PHJPGV14aDiB6B1U/wRYIh6+zSRBfpfGf6DpOZmiR5XD2kzgHCBtlzJc97dOJfy9yPxNlnIAQvJCrn3w=="
    data_dec = decrypt(data_enc, key, iv)
    print (data_dec)
    print (data_dec.decode('utf-8').replace('\x00', ''))