from cryptography.hazmat.primitives.asymmetric import rsa
from cryptography.hazmat.primitives import serialization

key = rsa.generate_private_key(public_exponent=65537, key_size=1024)

print(key.private_bytes(
    serialization.Encoding.PEM,
    serialization.PrivateFormat.PKCS8,
    serialization.NoEncryption()
).decode())

print(key.public_key().public_bytes(
    serialization.Encoding.PEM,
    serialization.PublicFormat.SubjectPublicKeyInfo
).decode())