# 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!
---
# Agent Instructions: Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter:
```
GET https://www.anandisheladiya.com/skills-and-experience/backend/python-and-django.md?ask=
```
The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.