Building Your First Website Using Python and Flask

Are you looking to build your first website using Python? Want to step into the world of web development but don’t know where to start? This beginner-friendly guide will walk you through creating a simple yet functional website using Flask, one of the most lightweight and popular Python web frameworks.

Whether you are a student, a beginner coder, or someone exploring backend development, this guide will help you understand the basics of Python Flask web development and get hands-on experience with building your first site.

🔹 What is Flask?

Flask is a micro web framework written in Python. Unlike larger frameworks like Django, Flask is simple, flexible, and easy to understand, making it perfect for beginners.

✅ Key Features of Flask:

Lightweight and beginner-friendly
Supports modular programming
Based on Python (one of the most in-demand languages)
Allows full control over development
Ideal for small projects and prototypes

🔹 Why Learn Flask for Web Development?

If you’re new to backend development, learning Flask can open up many doors:

Build websites and REST APIs
Create Python-powered dashboards and web apps
Use it as a foundation to learn Django or FastAPI
Add projects to your portfolio or resume
Practice real-world development and logic building

🔹 Prerequisites for Building a Flask Website

Before we start coding, here’s what you need:

✅ Basic Tools:

Python 3.x installed on your machine
Code Editor like VS Code, Sublime Text, or PyCharm
Basic understanding of Python and HTML

✅ Install Flask:

Open your terminal or command prompt and run:

bash

pip install flask

That’s it—your Python environment is ready to build a website.

🔹 Project Structure

Here’s a simple folder structure for your first Flask website:

pgsql

my_flask_site/
│
├── app.py
├── templates/
│   ├── index.html
│   └── about.html

app.py: Main Python script
templates/: Folder that stores HTML pages (Flask uses Jinja2 templating)

🔹 Step-by-Step Flask Website Tutorial

Let’s now create a small two-page website with a Home and About page.

🧠 Step 1: Writing the Main Flask App (`app.py`)

python

from flask import Flask, render_template
app = Flask(__name__)
@app.route('/')def home():    return render_template('index.html')
@app.route('/about')def about():    return render_template('about.html')
if __name__ == '__main__':    app.run(debug=True)

Here’s what’s happening:

@app.route('/'): Defines the URL route
render_template(): Loads HTML files from the templates folder
debug=True: Enables automatic reloads during development

📄 Step 2: Create HTML Templates

`templates/index.html`

html

<!DOCTYPE html>
<html>
<head>    <title>Welcome | Flask Site</title>
</head><body>    <h1>Welcome to My First Python Flask Website</h1>
    <p>This is the homepage.</p>
    <a href="/about">About</a>
</body></html>

`templates/about.html`

html

<!DOCTYPE html>
<html>
<head>    <title>About | Flask Site</title>
</head><body>    <h1>About This Site</h1>
    <p>This is a simple website created using Python and Flask framework.</p>
    <a href="/">Go Back Home</a>
</body></html>

🚀 Step 3: Run the Flask App

In your terminal, go to your project folder and run:

bash

python app.py

Visit http://127.0.0.1:5000/ in your browser to view your website.

Congratulations! 🎉 You’ve just created your first Python Flask web app!

🔧 What You’ve Learned So Far

By following this tutorial, you've learned:

How to use Flask for web development
How to create routes and link pages
How to build a basic website using Python and HTML
How to render HTML templates using Flask

This project is a strong base for more advanced web development tasks using Python.

🔎 SEO Benefits of Learning Flask

If you’re looking to rank your Python skills or blog content, here’s why building Flask projects helps:

Flask is a top-searched Python web framework
"How to build a website using Python" is a high-traffic keyword
Flask tutorials are ideal for content creators, coding educators, and tech bloggers
Python and Flask keywords together improve search visibility for coding tutorials

🛠️ What’s Next?

Once you’re comfortable with this basic Flask app, you can:

🔄 Add More Pages

Use @app.route('/services') or similar to create more HTML pages.

📝 Add Forms

Accept user input using forms and handle it with Python logic.

🎨 Add CSS/JavaScript

Style your website with CSS and make it interactive with JS.

🗃️ Connect a Database

Use SQLite or MySQL to store and retrieve data.

📡 Build a REST API

Use Flask to serve data to front-end apps or mobile applications.

💼 Use Case: Python Flask Website for Portfolio or Resume

Many beginners and students use Flask to:

Create portfolio websites
Build college or internship projects
Practice backend development
Participate in hackathons or coding events
Apply for Python internships or web developer jobs

📌 Conclusion

Building your first website using Python Course in Jaipur and Flask is an exciting journey. Flask’s simplicity makes it one of the best Python frameworks for beginners in 2025. With just a few lines of code, you’ve created a functional website, learned about routing, HTML templates, and the basics of server-side web development.

Keep practicing, explore Flask’s features, and soon you’ll be able to build dynamic, data-driven websites and apps.

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