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# Python & Django
### **Introduction**
Python is one of the most popular and versatile programming languages, widely used for **web development, automation, data science, AI, and more**. In web development, **Django** and **Flask** are two of the most widely used frameworks that simplify backend development.
**Django** is a **full-stack web framework** that follows the **"batteries-included"** philosophy, providing built-in tools for authentication, database management, and security.
**Flask** is a **lightweight, minimalistic web framework** that provides flexibility, allowing developers to build scalable web applications with custom features.
## **Why Choose Python for Web Development?**
* **Easy to Learn** – Simple and readable syntax.
* **Huge Ecosystem** – Libraries for web, AI, ML, data science, etc.
* **Fast Development** – Django and Flask reduce development time.
* **Scalability** – Used by companies like Instagram, Pinterest, and Reddit.
* **Security** – Django provides built-in security features.
### Django – The Full-Featured Web Framework
### **1️⃣ Installing Django**
Install Django using **pip**:
```bash
pip install django
```
Check if Django is installed:
```bash
django-admin --version
```
2️⃣ **Creating a Django Project**
```bash
django-admin startproject myproject
cd myproject
python manage.py runserver
```
Visit **** in your browser to see your Django project running!
3️⃣ **Django Project Structure**
```csharp
myproject/
│── myproject/ # Main project settings
│── app/ # Application folder (models, views, templates)
│── manage.py # Command-line utility
│── db.sqlite3 # Database
```
4️⃣ Creating a Django App
```bash
python manage.py startapp myapp
```
Register the app in `settings.py`:
```python
INSTALLED_APPS = [
"django.contrib.admin",
"django.contrib.auth",
"myapp", # Register your app
]
```
### **5️⃣ Django Models – Database Handling**
Django uses **ORM (Object-Relational Mapping)** for database management.
**Define a Model in `models.py`**
```python
from django.db import models
class Product(models.Model):
name = models.CharField(max_length=255)
price = models.DecimalField(max_digits=10, decimal_places=2)
created_at = models.DateTimeField(auto_now_add=True)
```
Apply Migrations to Create the Database Table
```bash
python manage.py makemigrations
python manage.py migrate
```
Create a Superuser for Admin Panel
```bash
python manage.py createsuperuser
```
Visit **** to manage the database using Django’s built-in admin panel.
6️⃣ Django Views & Routing
Define a View in `views.py`
```python
from django.http import HttpResponse
def home(request):
return HttpResponse("Hello, Django! 🎉")
```
Define a URL Pattern in `urls.py`
```python
from django.urls import path
from .views import home
urlpatterns = [
path("", home),
]
```
**Visit:** \*\*
**Output:** `"Hello, Django!`
### **7️⃣ Django Templates – Rendering HTML**
**Create a Template (`templates/home.html`)**
```html
Django App
Welcome to Django!
```
Modify `views.py` to Use Templates
```python
from django.shortcuts import render
def home(request):
return render(request, "home.html")
```
Now your Django app can render HTML pages dynamically!