JWT Authentication in Python

JWT Authentication in Python — a practical guide to Python JWT authentication with clear examples you can reuse in real projects.

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Short description

Issue a signed JWT on login and require `Authorization: Bearer <token>` on protected routes.

PyJWT sketch

# pip install PyJWT
import jwt
from datetime import datetime, timedelta, timezone

def create_token(user_id: int, secret: str) -> str:
    payload = {
        'sub': user_id,
        'exp': datetime.now(timezone.utc) + timedelta(hours=24),
    }
    return jwt.encode(payload, secret, algorithm='HS256')