How can I implement authentication in a Python web application?

How can I implement authentication in a Python web application?

You can use libraries like Flask-Login or Django's built-in authentication system. Which framework are you using?

I'm using Flask. Can you give me a basic example?

Sure! First, install Flask-Login. Then, set up a user loader and create login routes. Would you like a code snippet?

Yes, please! A code snippet would be great.

Here's a simple example:

from flask import Flask, redirect, url_for, request
from flask_login import LoginManager, UserMixin, login_user, login_required

app = Flask(__name__)
app.secret_key = 'your_secret_key'
login_manager = LoginManager()
login_manager.init_app(app)

class User(UserMixin):
    def __init__(self, id):
        self.id = id

@login_manager.user_loader
def load_user(user_id):
    return User(user_id)

@app.route('/login', methods=['GET', 'POST'])
@login_required
def login():
    # Handle login logic here
    pass

if __name__ == '__main__':
    app.run()

This sets up a basic login route.