Flask is a lightweight and flexible Python web framework for building web applications, APIs, and backend services with minimal setup.

Why Use Flask?
Lightweight and beginner-friendly
Quick to set up and deploy
Flexible and modular
Built-in development server & debug*er
Supports extensions like Flask-Login, Flask-WTF, etc.

Basic Usage
python
from flask import Flask

app = Flask(_name_)

@app.route('/')
def home():
return Hello, Flask!

if _name_ == '_main_':
app.run(debug=True)


Common Features
1. Dynamic Routing
python
@app.route('/user/name')
def user(name):
return fWelcome, name!


2. Handling Forms & Requests
python
from flask import request

@app.route('/submit', methods=['POST'])
def submit():
data = request.form['name']
return fHello, data


3. Rendering HTML with Templates
python
from flask import render_template

@app.route('/about')
def about():
return render_template('about.html')


4. API Endpoints (JSON)
python
from flask import jsonify

@app.route('/api/data')
def data():
return jsonify('key': 'value')

Real-World Use Cases
Building RESTful APIs
Prototyping web apps quickly
Admin dashboards or web panels
Backend for mobile/web clients

Summary
Ideal For: Lightweight and fast web development
Strength: Minimalistic yet powerful
Bonus: Easy to learn, perfect for beginners