Welcome to our Python Flask Website tutorial!

In this tutorial, we will introduce you to Python Flask and show you how to create a simple website using this web framework.

What is Python Flask?

Python Flask is a lightweight web framework that allows you to easily build web applications in Python. It is simple and easy to use, making it great for beginners and experienced developers alike.

Setting up Python Flask

Before you can start building a website with Python Flask, you need to install the Flask library. You can do this using pip, the Python package manager.

pip install flask

Creating a Flask App

To create a Flask app, you need to import the Flask class and create an instance of it. Here’s a simple example of a Flask app that just displays a “Hello, World!” message:

from flask import Flask

app = Flask(__name__)

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

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

Save this code in a file named app.py. To run the Flask app, simply execute the file using the Python interpreter:

python app.py

Creating Routes

In a Flask app, routes are used to match the URL of a request to a specific function that generates the response. Routes are defined using the @app.route() decorator. Here’s an example of a route that displays a page with a greeting message:

@app.route('/greet')
def greet():
    return 'Hello, happy to meet you!'

Using Templates

Flask allows you to use templates to create dynamic web pages. Templates are written in HTML with placeholders that are replaced with dynamic content using the Jinja2 templating engine. Here’s how you can use a template in a Flask app:

from flask import render_template

@app.route('/template')
def template():
    name = 'John'
    return render_template('template.html', name=name)

Save the template HTML file in a folder named templates in the same directory as your Flask app. Here’s an example of a simple template that displays the name variable:

<h1>Hello, {{ name }}!</h1>

Conclusion

That’s it for our introduction to Python Flask Website tutorial! With Flask, you can easily create web applications in Python and customize them to suit your needs. We hope you found this tutorial helpful and are excited to see what you can create with Flask!