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With the popularity of the Internet, more and more people are beginning to transition to Web development. The Python language has gradually become one of the mainstream languages in the field of web development because of its characteristics such as easy to learn, strong readability, and support for multiple programming paradigms. As a web framework for the Python language, Django provides powerful support for web development in the Python language and has become the first choice of many developers. This article will introduce the relevant knowledge of Django starting from the basic concepts to help beginners quickly understand the introduction to Django programming.
1. The origin and overview of Django
Django is an open source web framework created by Adrian Holovaty and Simon Willison in 2003 during the process of producing news websites for newspapers. The main feature of Django is to follow the MVC pattern to improve the maintainability and scalability of web applications. It is a highly modular framework that includes functions such as ORM, template engine, form processing, etc.
The latest version of Django is 3.2.6, which provides many new features and improvements. For example, asynchronous views and ASGI are supported, foreign key fields use the UUID type by default, JSONField and ArrayField types are added, and request headers can be obtained through the headers attribute of the HttpRequest object, etc. In general, Django provides developers with rich functions and convenient development methods, making web application development more efficient and faster.
2. Basic concepts of Django
3. Django installation and project creation
django-admin startproject mysite
This command will create a project directory and file named mysite, which contains a A management script called manage.py and a Django package called mysite.
python manage.py runserver
4. Django routing and views
from django.urls import path from . import views urlpatterns = [ path('hello/', views.say_hello), ]
from django.http import HttpResponse def say_hello(request): return HttpResponse('Hello Django!')
The above code will return an HTTP response containing the "Hello Django!" message.
5. Django’s template and form processing
<!DOCTYPE html> <html> <head> <title>{{ title }}</title> </head> <body> <h1>{{ title }}</h1> <p>{{ content }}</p> </body> </html>
from django import forms class ContactForm(forms.Form): name = forms.CharField(label='Your name', max_length=100) email = forms.EmailField(label='Email address') message = forms.CharField(widget=forms.Textarea)
The above code will create a ContactForm class for collecting contact form information submitted by users.
6. Summary
As a powerful Web framework, Django provides strong support for Web development in Python language. With its high scalability, high modularity, ORM and other characteristics, it has become one of the preferred frameworks for developers to develop medium and large-scale web applications. This article briefly introduces Django's overview, basic concepts, installation and creation, routing and views, templates and form processing, etc., for beginners to learn and refer to.
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