from cryptography.hazmat.primitives import serialization
from cryptography.hazmat.backends import default_backend
from json import load
import jwt

PRIVATE_KEY = "pkcs8privatekey.pem"
PAYLOAD = "jwt"

with open(PRIVATE_KEY, "rb") as f:
    pem_bytes = f.read()

with open(PAYLOAD, "rb") as f:
    payload = load(f)

print(pem_bytes)
print(payload)

private_key = serialization.load_pem_private_key(pem_bytes, password=None, backend=default_backend())
encoded = jwt.encode(payload, private_key, algorithm="RS256")
print(encoded)