AttributeError: 'int' object has no attribute 'PublicKey'

Код

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import rsa
import random
import binascii
import rsa.randnum
from cryptography.fernet import Fernet
#from Crypto.PublicKey import RSA

Crypto = 0
Crypto.PublicKey.RSA.generate()
print(Crypto)

Ошибка

AttributeError: 'int' object has no attribute 'PublicKey'

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