Django installation tutorial: Quickly get started with Python Web development

Django installation tutorial: Get started with Python web development quickly, specific code examples are required

Introduction:
In today's Internet era, the field of web development is growing day by day, and Python As a simple, easy-to-learn, and powerful programming language, it has become the first choice of many web developers. Among Python web development frameworks, Django has become one of the most popular choices due to its powerful functions and efficient performance. This article will introduce you to how to install Django and get started quickly.

1. Install Python and PIP
Django is written in Python language, so first we need to install Python. Please visit the Python official website (https://www.python.org/) to download and install the latest version of Python. During the installation process, be sure to check the box Install PIP, which is Python's package management tool that we will use to install Django.

After the installation is completed, open a command line terminal (you can use CMD or PowerShell for Windows systems, and you can use Terminal for Mac systems), enter the following command to check whether Python and PIP are installed successfully:

python --version
pip --version

If If the version numbers of Python and PIP are displayed, the installation is successful.

2. Install Django
Enter the following command in the terminal and use PIP to install Django:

pip install django

This command will automatically download and install the latest version of Django. After the installation is complete, we can check whether Django is successfully installed by running the following command:

django-admin --version

If the version number of Django is displayed, the installation is successful.

3. Create a Django project
Enter the following command in the terminal to create a new Django project:

django-admin startproject myproject

This command will create a project named "myproject" in the current directory folder, which is the root directory of our Django project.

4. Run the Django project
Enter the "myproject" folder and enter the following command to run the Django project:

python manage.py runserver

Then enter "http://localhost" in the browser :8000/" to access our Django project. If you can see Django's default welcome page, then we have successfully run a Django project!

5. Create Django applications
In Django, a project can contain multiple applications. Each application is an independent module with specific functionality. In order to create a Django application, we need to enter the root directory of the project and enter the following command:

python manage.py startapp myapp

This command will create a folder named "myapp" in the root directory of the project. This is the root directory of our Django application.

6. Writing Django Views
In Django, views are responsible for processing user requests and returning responses. In our Django app, we need to create a view function to handle requests.

Open the "myapp/views.py" file and enter the following code:

from django.http import HttpResponse

def hello(request):
    return HttpResponse("Hello, Django!")

This code defines a view function named "hello", which receives a request object as a parameter, and returns an HTTP response containing "Hello, Django!"

7. Configure Django URL
In Django, URL is used to map user requests to corresponding view functions. We need to configure the URL so that the corresponding view can be correctly called when the user accesses the application.

Open the "myproject/urls.py" file and enter the following code:

from django.urls import path
from myapp.views import hello

urlpatterns = [
    path('hello/', hello),
]

This code defines a URL pattern named "hello". When the user accesses "http:// localhost:8000/hello/", Django will call the "hello" view function to handle the request.

8. Start the Django development server
Enter the following command to start the Django development server:

python manage.py runserver

Then enter "http://localhost:8000/hello/" in the browser Visit our Django app. If you can see "Hello, Django!" displayed on the page, then our Django application has run successfully!

Summary:
This article provides you with a Django installation tutorial, and shows how to quickly get started with Python web development through specific code examples. I hope that through the guidance of this article, readers can successfully install and run the Django project and start their own web development journey. I wish you all the best to write excellent Python web applications!

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