How can I implement user login in my Python web app?

How can I implement user login in my Python web app?

You can use Flask or Django for your Python web app. Do you have a preference for either framework?

I prefer Flask. What libraries do I need?

For Flask, you can use Flask-Login for user session management and Flask-SQLAlchemy for database interactions.

Can you provide a simple code example?

Sure! Here's a basic example:

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

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

class User(UserMixin):
    pass

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

@app.route('/login', methods=['GET', 'POST'])
def login():
    if request.method == 'POST':
        user = User()
        user.id = request.form['username']
        login_user(user)
        return redirect(url_for('protected'))
    return render_template('login.html')

@app.route('/protected')
@login_required
def protected():
    return 'Logged in successfully!'

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

What about user registration?

You can create a registration route that saves user details to your database. Would you like a code example for that?