安装
安装环境：
- macOS 10.14
- Python 3.7
安装步骤：
sudo pip3 install django
检查是否安装成功
django-admin --version
2.1.1
显示版本说明已安装成功
Hello World
创建第一个Django项目。在任意文件夹下执行
django-admin startproject HelloWorld
cd HelloWorld
python3 manage.py runserver
Performing system checks...
System check identified no issues (0 silenced).
You have 15 unapplied migration(s). Your project may not work properly until you apply the migrations for app(s): admin, auth, contenttypes, sessions.
Run 'python manage.py migrate' to apply them.
October 08, 2018 - 07:57:26
Django version 2.1.1, using settings 'HelloWorld.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CONTROL-C.
在浏览器中访问127.0.0.1:8000，即可进入欢迎界面
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