Do you want to create your own web app, but don't know where to start?
For those people, we recommend creating a simple web app using Python and Flask.

Python is easy for beginners to understand, and Flask is a lightweight, easy-to-learn framework.
This article will explain in detail the steps required to create a web application.

The steps are explained with code, so anyone can create a working app in no time!

Explaining what Python and Flask are

Why Flask is great for web apps

Conclusion: With Python and Flask, you can build web apps with very little code.

reason:

• Python is easy to read
• Flask is lightweight and flexible
• Easy to use even for beginners

For example, it has the following features:

• You can build an app with just one file
• Low learning cost
• Easy to extend functionality later

This makes Flask a great choice for both learning and production.

Prepare your Flask development environment

Installing Python and Flask

Follow the steps below to set up your development environment.

# Install Python (from the official website)

Welcome to Python.org
The official home of the Python Programming Language
www.python.org

# Create a virtual environment python -m venv venv source venv/bin/activate # For Windows venv\Scripts\activate # Install Flask pip install flask

By using a virtual environment, other projects will not be affected.

Design the web app configuration

Minimal directory configuration

myapp/ ├── app.py └── templates/ └── index.html

Start with a small number of files and proceed while checking that it works.

Creating basic routing with Flask

Code to display "Hello, World!"

from flask import Flask app = Flask(__name__) @app.route("/") def hello(): return "Hello, World!" if __name__ == "__main__": app.run(debug=True)

In your browser http://localhost:5000 You can see it by accessing.

Embedding HTML Templates

Displaying dynamic pages with Jinja2

from flask import Flask, render_template app = Flask(__name__) @app.route("/") def index(): return render_template("index.html")

 Welcome to the Flask web app

This will allow you to load static HTML as well.

How to receive form input

Receiving POST submissions

from flask import request @app.route("/submit", methods=["POST"]) def submit(): name = request.form.get("name") return f"Thank you, {name}, for submitting your request!"

It can process form input and display the response dynamically.

Common errors and their solutions

• ModuleNotFoundError: No module named 'flask'
  → Flask needs to be installed.pip install flask Don't forget.
• jinja2.exceptions.TemplateNotFound
  → Templates Make sure you have placed the HTML in the folder.

Completed code (app.py)

from flask import Flask, render_template, request app = Flask(__name__) @app.route("/") def index(): return render_template("index.html") @app.route("/submit", methods=["POST"]) def submit(): name = request.form.get("name") return f"Thank you, {name}!

Summary: Python + Flask is the best introductory environment

• Create web apps with Python and Flask
• Beginner-friendly syntax
• Forms and HTML can be easily integrated
• Environment construction is simple

Let's start by displaying "Hello, World!".
Next, try out database integration and login functions!