Flask is a popular Python web framework that is widely used for developing backend applications. In this blog post, we will explore the basics of Flask and learn how to create a simple backend application using this framework.
Getting Started with Flask
Flask is known for its simplicity and ease of use, making it a great choice for beginners and experienced developers alike. To start using Flask, you first need to install it using pip:
pip install Flask
Creating Your First Flask Application
Once Flask is installed, you can create a new Python file for your application. Let’s create a basic “Hello World” app:
“`python
from flask import Flask
app = Flask(__name__)
@app.route(‘/’)
def hello_world():
return ‘Hello, World!’
if __name__ == ‘__main__’:
app.run()
“`
Routing and Views in Flask
In Flask, routes are used to map URLs to specific functions in your application. Routes can be defined using the @app.route() decorator. For example:
“`python
@app.route(‘/about’)
def about():
return ‘This is the About page’
“`
Templates and Static Files
Flask allows you to use templates and static files to create dynamic web pages. You can create HTML templates using Jinja2 syntax and serve static files like CSS and JavaScript. Here’s an example of using templates in Flask:
“`python
from flask import render_template
@app.route(‘/home’)
def home():
return render_template(‘home.html’, title=’Home Page’)
“`
Flask is a powerful and flexible framework for building backend applications in Python. By following the steps outlined in this blog post, you can get started with Flask and create your own backend projects.
Have you worked with Flask before? Share your experience in the comments below!