def generate_rsa_private_key(self, public_exponent, key_size):
        """
        Generate an RSAPrivateKey instance with public_exponent and a modulus
        of key_size bits.
        """

        Generate an RSAPrivateKey instance with public_exponent and a modulus
        of key_size bits.
        
stackoverflow/venv/lib/python3.6/site-packages/cryptography/hazmat/backends/interfaces.py