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Web development in Python#

Python is quite capable when it comes to web development, and there are a variety of frameworks and modules are available for it. These can be used to create web applications.

Flask, Django, and Pyramid are a few well-known frameworks. The choice of framework will rely on the project's requirements. Each of these frameworks has advantages and disadvantages of its own.

Creating a basic web app using Flask#

Creating a basic web application using Flask: Flask is a micro web framework for Python that is easy to learn and use. It provides a simple way to create web applications and APIs using Python. Here are some examples of Flask code for creating a basic web application:

from flask import Flask

app = Flask(__name__)

@app.route('/')
def hello_world():
    return 'Hello, World!'
This code creates a Flask application and defines a single route for the root URL (/). When the user visits the URL, the hello_world() function is called and returns the string 'Hello, World!'.

Working with databases:#

The majority of online applications need some sort of permanent storage, and Python offers a number of modules and frameworks for doing so. Popular options include Django ORM, Peewee, and SQLAlchemy. Here is an illustration of how to work with a SQLite database using SQLAlchemy:

from flask import Flask
from flask_sqlalchemy import SQLAlchemy

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///test.db'
db = SQLAlchemy(app)

class User(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(50))

@app.route('/')
def index():
    users = User.query.all()
    return render_template('index.html', users=users)
This code creates a SQLite database and a User table using SQLAlchemy. The index() function queries the database for all users and passes them to the template for rendering.

Having a good understanding of how these web apps work, will help you with automation and deployment when it comes to practicing DevOps.

Serverless Technologies#

You can dive deeper into how you can build APIs using Python and serverless technologies like:

  • Google Cloud Functions
  • IBM Cloud Functions
  • Alibaba Cloud Function Compute
  • Aliyun Serverless Compute Service
  • Tencent Cloud Functions
  • Digital Ocean Functions
  • Linode Functions
  • UpCloud Functions
  • Vultr Functions

I have a demo on how I built a serverless resume API.

Resources#