python django启动报错

创建好django项目之后，runserver启动报错……

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Performing system checks...

System check identified no issues (0 silenced).

You have 17 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.
April 05, 2019 - 21:59:41
Django version 2.2, using settings ‘yaradish.settings‘
Starting development server at http://127.0.0.1:8000/
Quit the server with CTRL-BREAK.
Exception in thread Thread-1:
Traceback (most recent call last):
  File "c:\program files (x86)\python37-32\Lib\threading.py", line 917, in _bootstrap_inner
    self.run()
  File "c:\program files (x86)\python37-32\Lib\threading.py", line 865, in run
    self._target(*self._args, **self._kwargs)
  File "E:\python\demo-yaradish\lib\site-packages\django\utils\autoreload.py", line 54, in wrapper
    fn(*args, **kwargs)
  File "E:\python\demo-yaradish\lib\site-packages\django\core\management\commands\runserver.py", line 139, in inner_run
    ipv6=self.use_ipv6, threading=threading, server_cls=self.server_cls)
  File "E:\python\demo-yaradish\lib\site-packages\django\core\servers\basehttp.py", line 203, in run
    httpd = httpd_cls(server_address, WSGIRequestHandler, ipv6=ipv6)
  File "E:\python\demo-yaradish\lib\site-packages\django\core\servers\basehttp.py", line 67, in __init__
    super().__init__(*args, **kwargs)
  File "c:\program files (x86)\python37-32\Lib\socketserver.py", line 452, in __init__
    self.server_bind()
  File "c:\program files (x86)\python37-32\Lib\wsgiref\simple_server.py", line 50, in server_bind
    HTTPServer.server_bind(self)
  File "c:\program files (x86)\python37-32\Lib\http\server.py", line 139, in server_bind
    self.server_name = socket.getfqdn(host)
  File "c:\program files (x86)\python37-32\Lib\socket.py", line 676, in getfqdn
    hostname, aliases, ipaddrs = gethostbyaddr(name)
UnicodeDecodeError: ‘utf-8‘ codec can‘t decode byte 0xd1 in position 0: invalid continuation byte

原因及解决方案：

一般来说编码错误是由中文引起的。从 traceback 最后一栈落在 gethostbyaddr 上可以看出：你电脑的主机名多半是设成了中文了。然后查看了自己的主机名，确实为中文

修改计算机主机名为英文

查看主机名

计算机右键属性，点击高级系统设置，图中标记即为主机名，修改如箭头步骤所示。修改后要重启电脑。

原文地址：https://www.cnblogs.com/yaradish/p/10659975.html