flask_sample_app.py

from flask import Flask

app = Flask(__name__)


@app.route('/')
def hello_world():
    return 'Hello, World!'


@app.route('/foo')
def hello_world2():
    return 'Hello, Foo!'


@app.route('/bar')
def hello_world3():
    return 'Hello, Foo!'


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