from flask import Flask, render_template

app = Flask(__name__)

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

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

Key Projects

• Personal Blog Website: Create a simple blog site using Flask where users can create, edit, and delete blog posts.
• E-commerce Platform: Develop a basic online store using Django that includes product listings, a shopping cart, and user authentication.
• Real-Time Chat Application: Build a chat application using Tornado, enabling users to communicate in real-time with WebSocket support.
• RESTful API Development: Create an API for a book collection using Flask-RESTful, allowing users to manage their book information.

Python Code Examples

Personal Blog Website

        
from flask import Flask, render_template, request, redirect

app = Flask(__name__)

posts = []

@app.route('/')
def index():
    return render_template('index.html', posts=posts)

@app.route('/add', methods=['POST'])
def add_post():
    title = request.form['title']
    content = request.form['content']
    posts.append({'title': title, 'content': content})
    return redirect('/')

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

E-Commerce Platform

        
from django.db import models
from django import forms

class Product(models.Model):
    name = models.CharField(max_length=100)
    description = models.TextField()
    price = models.DecimalField(max_digits=10, decimal_places=2)

class ProductForm(forms.ModelForm):
    class Meta:
        model = Product
        fields = ['name', 'description', 'price']
        
    

Real-Time Chat Application

        
import tornado.ioloop
import tornado.web
import tornado.websocket

class ChatWebSocket(tornado.websocket.WebSocketHandler):
    clients = set()

    def open(self):
        self.clients.add(self)

    def on_message(self, message):
        for client in self.clients:
            client.write_message(message)

    def on_close(self):
        self.clients.remove(self)

app = tornado.web.Application([(r'/chat', ChatWebSocket)])

if __name__ == '__main__':
    app.listen(8888)
    tornado.ioloop.IOLoop.current().start()
        
    

RESTful API Development

        
from flask import Flask, jsonify, request
from flask_restful import Resource, Api

app = Flask(__name__)
api = Api(app)

books = []

class Book(Resource):
    def get(self):
        return jsonify(books)

    def post(self):
        new_book = request.json
        books.append(new_book)
        return jsonify(new_book), 201

api.add_resource(Book, '/books')

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

Real-World Applications

The capabilities of Python for web development are far-reaching:

• Business Websites: Companies use Python frameworks like Django and Flask to build informative and interactive websites that drive engagement.
• Data Analysis and Visualization: Python can power web applications that provide analytics and visualizations from complex datasets, such as those used in finance and research.
• Social Media Platforms: Python is utilized to develop features like user feeds, messaging, and notifications in social networking sites.
• RESTful Services: Many modern applications rely on RESTful APIs built with Python to facilitate communication between services, such as mobile apps and web servers.