【1】依照Django官网，编写一个web app

$ django-admin startproject mysite

Let’s look at what startproject created:
mysite/
    manage.py
    mysite/
        __init__.py
        settings.py
        urls.py
        wsgi.py
2.安装mysqlclient

   pip install mysqlclient 

   ps：MySQLdb不能用于python3

3.Database setup?(mysql)
   Now, open up mysite/settings.py. It’s a normal Python module with module-level variables representing Django settings.     

 If you wish to use another database, install the appropriate database bindings, and change the following keys in theDATABASES ‘default‘ item to match your database connection settings: 

 DATABASES = {
    ‘default‘: {
        ‘ENGINE‘: ‘django.db.backends.mysql‘,
        ‘NAME‘: ‘mydb‘,
		‘USER‘:‘root‘,
		‘PASSWORD‘:‘ganbare‘,
		‘HOST‘:‘localhost‘,
		‘PORT‘:‘3306‘,
    }
}