In this tutorial you will learn about the Flask First Application and its application with practical example.
In this tutorial, we will create a simple hello world website using the Python Flask framework. Please follow the step by step guide to create your first flask application.
Create a Flask Application
Now, let’s create a directory for your project and create a Python file for your Flask application. You can name this file, for example,
Write Your First Flask Application
app.py file, write the following code to create a simple Flask application:
from flask import Flask
app = Flask(__name__)
return 'Hello, Flask!'
This code does the following:
- It imports the Flask class from the Flask library.
- It creates an instance of the Flask class called
- It defines a route (“/”) and a function (
hello_world) to handle requests to that route. In this case, it returns the text “Hello, Flask!” as a response.
Run Your Flask Application
To run your Flask application, open your terminal or command prompt, navigate to the directory containing
app.py, and run the following command:
You should see output indicating that your Flask app is running, and it will provide a URL (usually
http://127.0.0.1:5000/) where your app is accessible.
Access Your Flask Application
Open a web browser and enter the URL provided in the terminal (e.g.,
You should see the message “Hello, Flask!” displayed in your browser. Congratulations! You’ve created and run your first Flask web application.
In this tutorial, you’ve taken your first steps into the world of Flask web development. You’ve learned how to set up Flask, create a simple web application, and run it locally.