# Import necessary libraries from flask import Flask, render_template, request, redirect, url_for import json # Initialize Flask app app = Flask(__name__) # Load physics lesson data from JSON file with open('lessons.json') as f: lessons_data = json.load(f) # Home page route @app.route('/') def home(): return render_template('index.html') # Lesson page route @app.route('/lesson/ ') def lesson(topic):