from flask import Flask, render_template ''' Red underlines? Install the required packages first: Open the Terminal in PyCharm (bottom left). On Windows type: python -m pip install -r requirements.txt On MacOS type: pip3 install -r requirements.txt This will install the packages from requirements.txt for this project. ''' app = Flask(__name__) @app.route("/") def home(): return render_template('index.html') if __name__ == '__main__': app.run(debug=True)