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Kathmandu2016
NOW is better
thanNEVER
Why Python
• 4th Most popular language - IEEE survey• Python is easy to use• Powerful• Versatile• Choice for beginners and experts
Java & Python
TOP 10 PROGRAMMING LANGUAGES
• Java• C• C++• Python• C#• R• PHP• JavaScript• Ruby• Matlab
Django!
Build with Python / Django
A framework
Not a CMS
Overview
Model View Controller
Fat Models
Templates
Thin views
Why Django is awesome
3 reasons
Why Django is awesome
Python
Python
Design Philosophy
- Less Code- Quick development- Don’t repeat yourself (DRY)- Models- URL design- Template system- Views
Community
from django.db import models
class Author(models.Model): name= models.CharField(max_length=50) email = models. EmailField()
class Book(models.Model): author = models.ForeignKey(Author) title= models.CharField(max_length=100) price = models. DecimalField(decimal_places=2, max_digits=11)
from django.conf.urls import patternsfrom books.views import BooksListView, BooksDetailsViewurlpatterns = [ url(r'^admin/', admin.site.urls), url(r'^books/$', BooksListView.as_view() ), url(r'^books/(?P<pk>[0-9])/$', BooksDetailsView.as_view() ),]
from django.http import HttpResponsefrom django.views.generic.list import ListViewfrom django.views.generic.detail import DetailsViewfrom .models import Books
class BooksListView(ListView): model = Booksclass BooksListView (DetailsView):
model = Books
models.py
urls.py
views.py
Example, part 1
<html><head><title>Books List</title></head><body>
<ul>{% for book in object_list %}<li><a href="/books/{{ book.id }}"> {{ book.title }}</a> => {{ book.price }} | Author:
{{ book.author.name }} </li>{% endfor %}
</ul>
</body></html>
books_list.html Example, part 1
<html><head><title>Book Details</title></head><body>
<h1>{{ object.title }}</h1> <p>By author: {{ object.author.name }} {{ object.author.email }},</p>
<ul> {% for related_book in object.author.books.all %} <li>{{ related_book }}</li> {% endfor %} </ul>
{% if book.number_of_pages > 100 %} <p>This is a thick book.</p> {% else %} <p>You can read it in 2 hours.</p> {% endif %}
</body></html>
books_detail.html Example, part 1
from django.contrib import adminfrom .models import Bookclass BooksAdmin(admin.ModelAdmin):
list_display = ['title', 'price', 'author']
admin.site.register(Books, BooksAdmin)
admin.py
Admin
Great tools
Happy coding
Resource
• https://jacobian.org/writing/why-django/• https://www.youtube.com/watch?v=OjCz8yTloUI• https://www.youtube.com/watch?
v=n8KnFywpXOE• https://docs.djangoproject.com/en/1.9/• https://www.python.org/• https://www.shuup.com/en/blog/25-of-the-
most-popular-python-and-django-websites/
Thank You
Kishor Kumar [email protected]@kishor_14
http://kishorkumarmahato.com.nphttp://fb.com/kishrorkumar
https://np.linkedin.com/in/kishrorkumarhttp://bitbucket.org/cyberkishor
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