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Tutorial 1: Introduction
=============================
Slide 1 [00:08 | 00:08]
-------------
**Introduction to Django**
Slide 2 [00:20 | 00:28]
--------------
**Learning Objectives**
In this tutorial, we will learn about;
- What is a web application
- What is a web framework
- Why to use Django
- What is virtual
- Django installation
Slide 3 [00:15 | 00:53]
---------------
**System Requirements**
- Ubuntu 16.10
- Python 3.5 or higher version
- python3.4-venv (Install using *apt-get install python3.4-venv*)
Slide 4 [00:12 | 01:05]
---------------
**Pre-requisites**
In order to follow this tutorial, you need;
- Knowledge in Object Oriented Python Programming
- If not, see the Python tutorials on http://spoken-tutorial.org
Slide 5 [00:10 | 01:15]
----------------
**What is Django**
- Free and open source
- Web application framework
- written in Python
- Very popular
[Image of Django logo]
Slide 6 [00:35 | 01:50]
----------------
**What is a web application**
** Narration for this slide **
- An application stored on a remote computer i.e. server
- A server can be accessed by a user through a web browser
- A user communicates with the server by sending a 'request'
- The web application carries out actions as per the request
- It has 'database' to store and manipulate data
- It sends a response to the user
- The user's browser then displays this response
Slide 7 [00:16 | 02:06]
------------------
**What is a web Framework**
- Easy to develop web apps
- Provides
- Interface to DB
- Authentication (Login system)
- Templating engine (HTML rendering)
- Forms
Slide 8 [00:18 | 02:24]
-------------------
**Why Django**
- easy to start
- rapid development
- has a lot of pre-built features
- supports various database backends
- supports multilingual websites
- provides a user interface for administrative activities
Slide 9 [00:07 | 02:31]
--------------
**Where is Django used**
- Pinterest - A social image and web resource sharing site
- [Add Screenshot]
Slide 11 [00:05 | 02:36]
--------------
**Where is Django used**
- Instagram - A social photo sharing site
- [Add Screenshot]
Slide 12 [00:05 | 02:41]
--------------
**Where is Django used**
- Disqus - A commenting system that can be integrated on any web page
- [Add Screenshot]
Slide 13 [00:13 | 02:54]
---------------
**What is virtual environment**
- Create 'isolated' environment
- Does not require root access
- Install Python packages from PyPI
Demonstration [01:20 | 04:14]
----------------
**Working with virtual environments**
- Creating a virtual environment in Python 3
- *python3 -m venv ./myapp_env*
- Activate the environment
- *source ./myapp_env/bin/activate*
- Shell prompt will be *(myapp_env)user1:~$*
Demonstration [01:26 | 05:40]
---------------
**Install Django**
- Check if django is installed using;
- Command: *python -m django --version*
- If not installed then we see "No module named django"
- pip install django
- Again we check and now we see the django version
- Deactivate the environment
- deactivate
- You can also delete the virtual environment by deleting it's directory
- *rm -rf ./myapp_env*
Slide 13 [00:15 | 05:55]
---------------
** Assignment **
- Create a new virtual environment.
- Activate it.
- Install other version of django
** Followed by standard concluding slides ** [02:15 | 08:10]
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