A Flask application is typically structured as follows:

1. Create the application instance:

app = Flask(__name__)

2. Configure the application:

app.config[‘SECRET_KEY’] = ‘your_secret_key_here’

3. Define routes:

@app.route(‘/’)
def index():
return ‘Hello World!’

4. Create the database:

from flask_sqlalchemy import SQLAlchemy

db = SQLAlchemy(app)

5. Create models:

class User(db.Model):
id = db.Column(db.Integer, primary_key=True)
username = db.Column(db.String(80), unique=True, nullable=False)
email = db.Column(db.String(120), unique=True, nullable=False)

6. Create views:

@app.route(‘/users’)
def show_users():
users = User.query.all()
return render_template(‘users.html’, users=users)

7. Create templates:

Users

{% for user in users %}

{{ user.username }} – {{ user.email }}

{% endfor %}

8. Run the application:

if __name__ == ‘__main__’:
app.run()