python 38

Introduction to Django Framework:

Django is a high-level python web framework used to build secure, scalable, database-driven websites quickly.

Think of Django as: a complete toolbox to build websites using python

Why Django?

Fast development

Built-in security(SQL,injection,CSRF,XSS Protection)

Built-in ORM(no need to write sql manually)

Read-made admin panel 

Django feature:(user Authentication, admin dashboard, database ORM,URL routing,

forms & validation, security(CSRF,SQL injection).

MVT (Module view template)

Layer      Meaning  Role 

Model     database   database & data logic 

view        Logic      Business logic 

Template  UI          User Interface(HTML)

Step1: Create the Environment and activate

PS C:\Users\Administrator\Desktop\CCIT\PythonCourse\Day38> python -m venv ccitenv

PS C:\Users\Administrator\Desktop\CCIT\PythonCourse\Day38> Set-ExecutionPolicy -Scope CurrentUser -ExecutionPolicy RemoteSigned

PS C:\Users\Administrator\Desktop\CCIT\PythonCourse\Day38> ccitenv/Scripts/activate 

Step2: Install Django

(ccitenv) PS C:\Users\Administrator\Desktop\CCIT\PythonCourse\Day38> pip install django

Check environment using pip freeze command 

(ccitenv) PS C:\Users\Administrator\Desktop\CCIT\PythonCourse\Day38> pip freeze

asgiref==3.11.0

Django==6.0.1

sqlparse==0.5.5

tzdata==2025.3

Step3: Start the project 

(ccitenv) PS C:\Users\Administrator\Desktop\CCIT\PythonCourse\Day38> django-admin startproject ccitproject1

(ccitenv) PS C:\Users\Administrator\Desktop\CCIT\PythonCourse\Day38>

Below screen automatically created these files, you have create view,templates ..etc 

You have to go inside the directory

(ccitenv) PS C:\Users\Administrator\Desktop\CCIT\PythonCourse\Day38> cd .\ccitproject1

(ccitenv) PS C:\Users\Administrator\Desktop\CCIT\PythonCourse\Day38\ccitproject1>

 Flask File structure 

  Projectname

    app.py

    templates /.html

    static  /css /.css

    static/image/.img/.png

    static/js/.js

Step4: in Django run the project use manage.py , just like we use in flask app.py   

(ccitenv) PS C:\Users\Administrator\Desktop\CCIT\PythonCourse\Day38\ccitproject1> python manage.py runserver

This default page home for django

Step5: need to create view.py page here you need write business logic 

view.py 

def home():

 return "Welcome to Homepage!"

Step6:

You have register the page in urls.py file  , we have import views and route to home page give name to that 'home'

from .import views

urlpatterns = [

    path('admin/', admin.site.urls),

    path('', views.home, name='home')

    ]

Output getting error: response issue 

C:\Users\Administrator\Desktop\CCIT\PythonCourse\Day38\ccitenv\Lib\site-packages\django\core\handlers\exception.py, line 55, in inner

55.                 response = get_response(request

Step7: We have inform which of response, you have to send the home page,

we have  different type of response 

html  "<h1>Welcome to ccit</h1>"

json  - {"course":"AWS"}

http 

Step8: see below first line is the http response

from django.http import HttpResponse

def home(request):

    return HttpResponse("<h1>Welcome to the Home page!</h1>")

Output :

(ccitenv) PS C:\Users\Administrator\Desktop\CCIT\PythonCourse\Day38\ccitproject1> python manage.py runserver

Step9: here urls.py page you have registered every page where you writing business logic (view.py)

Task2: json response planning to send response to home page 

Step1:

view.py

from django.http import HttpResponse

from django.http import JsonResponse

def home(request):

    return HttpResponse("<h1>Welcome to the Home page!</h1>")

def course(request):

    data = {

        'course_name': 'Django Web Development',

        'duration': '6 weeks',

        'level': 'Beginner'

    }

    return JsonResponse(data)

urls.py

urlpatterns = [

    path('admin/', admin.site.urls),

    path('', views.home, name='home'),

    path('course/', views.course, name='course')

    ]

Output:

Task3: 

Step1:

home.html

<h1>Welcome to the Home page CCIT!</h1>

view.py

from django.http import HttpResponse

from django.http import JsonResponse

from django.shortcuts import render

def home(request):

    return render(request, 'home.html')

def course(request):

    data = {

        'course_name': 'Django Web Development',

        'duration': '6 weeks',

        'level': 'Beginner'

    }

    return JsonResponse(data)

Step2: We have define our project 'ccitproject1', and give templates DIRS 'DIRS': ['templates'],

We have to register the hom.html in settings.py file 

INSTALLED_APPS = [

    'django.contrib.admin',

    'django.contrib.auth',

    'django.contrib.contenttypes',

    'django.contrib.sessions',

    'django.contrib.messages',

    'django.contrib.staticfiles',

    'ccitproject1',

]

TEMPLATES = [

    {

        'BACKEND': 'django.template.backends.django.DjangoTemplates',

        'DIRS': ['templates'],

        'APP_DIRS': True,

        'OPTIONS': {

            'context_processors': [

                'django.template.context_processors.request',

                'django.contrib.auth.context_processors.auth',

                'django.contrib.messages.context_processors.messages',

            ],

        },

    },

urls.py 

urlpatterns = [

    path('admin/', admin.site.urls),

    path('', views.home, name='home'),

    path('course/', views.course, name='course')

    ]

Output: We have return html page 

Task4:

We have copy the index.html which was worked earlier copy the text to home.html

home.html

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>Cloud Computing In Telugu</title>

    <link rel="stylesheet" href="static/css/style.css">

</head>

<body>

<nav >

    <ul class="menu">

        <li><a href = "/">Home</a></li>

        <li><a href="/aboutus">About Us</a></li>

        <li><a href="/contactus">Contact Us</a></li>

       

    </ul>

</nav>

    <!-- Header Section -->

    <header>

    <h1>AWS Cloud Computing</h1>

    <section>

              <p>Learn how websites are built from scratch</p>

    </header>

    <main>

 

        <section id="sec4">

            <form method="post" >

            <button type="submit">Enroll Now</button>

            {% if msg %}

                {{ msg|safe }}

            {% endif %}

        </form>

            <h2>Join Our Cloud Computing Course Today!</h2>

         </section>

    </main>

    <!-- Footer -->

    <footer>

        <p>Regards,</p>

        <p>

            <a href="https://www.Google.com" target="_blank">

                Google Page

            </a>

        </p>

    </footer>

</body>

</html>

contactus.html same aboutus.html

{% load static %}

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>Cloud Computing In Telugu</title>

    <link rel="stylesheet" href="{% static 'css/style.css' %}">

</head>

<body>

<nav >

    <ul class="menu">

        <li><a href = "/">Home</a></li>

        <li><a href="/aboutus">About Us</a></li>

        <li><a href="/contactus">Contact Us</a></li>

       

    </ul>

</nav>

    <!-- Header Section -->

    <header>

    <h1>AWS Cloud Computing</h1>

    <section>

              <p>Learn how websites are built from scratch</p>

    </header>

    <main>

        <h2>Join Our Cloud Computing Course Today! Contact us</h2>

    </main>

    <!-- Footer -->

    <footer>

        <p>Regards,</p>

        <p>

            <a href="https://www.Google.com" target="_blank">

                Google Page

            </a>

        </p>

    </footer>

</body>

</html>

view.html

from django.http import HttpResponse

from django.http import JsonResponse

from django.shortcuts import render

def home(request):

    return render(request, 'home.html')    

def course(request):

    data = {

        'course_name': 'Django Web Development',

        'duration': '6 weeks',

        'level': 'Beginner'

    }

    return JsonResponse(data)

def aboutus(request):

        return render(request, 'aboutus.html')

# register the contactus view

def contactus(request):

    return render(request, 'contactus.html')

setting.py no change same as above 

Output: 

Aboutus Page , it will automatically route to aboutus.page

Contactus page:http://127.0.0.1:8000/contactus/

Home page: http://127.0.0.1:8000/

Task5: 

Multiple html page repeated code, to over come need to write base.html extended the base.html to

 all html page for main script 

base.html

{% load static %}

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>Cloud Computing In Telugu</title>

    <link rel="stylesheet" href="{% static 'css/style.css' %}">

</head>

<body>

<nav >

    <ul class="menu">

        <li><a href = "/">Home</a></li>

        <li><a href="/aboutus">About Us</a></li>

        <li><a href="/contactus">Contact Us</a></li>

       

    </ul>

</nav>

    <!-- Header Section -->

    <header>

    <h1>AWS Cloud Computing</h1>

    <section>

              <p>Learn how websites are built from scratch</p>

    </header>

    <main>

     {% block content %}

     {% endblock %}

    </main>

    <!-- Footer -->

    <footer>

        <p>Regards,</p>

        <p>

            <a href="https://www.Google.com" target="_blank">

                Google Page

            </a>

        </p>

    </footer>

</body>

</html>

home.html

{% extends 'base.html' %}

{% block content %}

<h2>Join Our Cloud Computing Course Today! Home</h2>

{% endblock %}

contactus.hmtl

{% extends 'base.html' %}

{% block content %}

<h2>Join Our Cloud Computing Course Today! Contactus</h2>

{% endblock %}

aboutus.html

{% extends 'base.html' %}

{% block content %}

<h2>Join Our Cloud Computing Course Today! aboutus</h2>

{% endblock %}

Advantage if anything adding page just add the line in base.html  it will effect home page 

       <li><a href="/course">Course</a></li>

course.html

{% extends 'base.html' %}

{% block content %}

<h2>Join Our Cloud Computing Course Today! Course </h2>

<p>Course Name: {{ course_name }}</p>

<p>Duration: {{ duration }}</p>

<p>Level: {{ level }}</p>

{% endblock %}

Output:

--Thanks  Tomorrow  session

Model (M) --Data Layer 

• A Model is a python class that represents a database  table
• Attributes inside the class define the table columns and their data types.
• Models store and manage application data.
• UI pages are generated using model data via view and templates.

Example: view.py

 from django.db import models

class student(models.Model):

 name= models.CharField(Max_length=100)

age= models.IntegerField()

email= models.EmailField()

Each class -->table

Each field -->column

Django ORM handles SQL for you

You can able Write url way also just for refernce

 <li><a href="{/aboutus">About Us</a></li>

        <li><a href="/contactus">Contact Us</a></li>

        <li><a href="/course">Course</a></li>

OR 

       <li><a href="{% url 'aboutus' %}">About Us</a></li>

        <li><a href="{% url 'contactus' %}">Contact Us</a></li>

        <li><a href="{% url 'course' %}">Course</a></li>

--Thanks