# 1. 创建更改的文件
$python manage.py makemigrations
# 2. 将生成的py文件应用到数据库
$python manage.py migrate

$python manage.py runserver
 # 当提示端口被占用的时候，可以用其它端口：
$python manage.py runserver 8001
$python manage.py runserver 9999
（当然也可以kill掉占用端口的进程，具体后面有讲，此处想知道的同学可查下 lsof 命令用法）
# 监听机器所有可用 ip （电脑可能有多个内网ip或多个外网ip）
$python manage.py runserver 0.0.0.0:8000
# 如果是外网或者局域网电脑上可以用其它电脑查看开发服务器
# 访问对应的 ip加端口，比如 http://172.16.20.2:8000

$python manage.py createsuperuser
# 按照提示输入用户名和对应的密码就好了邮箱可以留空，用户名密码必填
# 修改 用户密码可以用：
$python manage.py changepassword username

$python manage.py dumpdata appname > appname.json
$python manage.py loaddata appname.json

 mysite python3.6 manage.py
Type 'manage.py help <subcommand>' for help on a specific subcommand.
Available subcommands:
[auth]
  changepassword
  createsuperuser
[contenttypes]
  remove_stale_contenttypes
[django]
  check
  compilemessages
  createcachetable
  dbshell
  diffsettings
  dumpdata
  flush
  inspectdb
  loaddata
  makemessages
  makemigrations
  migrate
  sendtestemail
  shell
  showmigrations
  sqlflush
  sqlmigrate
  sqlsequencereset
  squashmigrations
  startapp
  startproject
  test
  testserver
[sessions]
  clearsessions
[staticfiles]
  collectstatic
  findstatic
  runserver