问在Python上本地运行flask时出现问题

EN

from flask import Flask
app = Flask(__name__)

@app.route("/")
def hello():
    return "Hello World!"

  File "c:\python36\lib\socket.py", line 673, in getfqdn
hostname, aliases, ipaddrs = gethostbyaddr(name)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0x8a in position 5: invalid
start byte

    D:\kiwiAdmission\flask>flask run
 * Serving Flask app "kiwi_flask.py"
 * Environment: production
   WARNING: Do not use the development server in a production environment.
   Use a production WSGI server instead.
 * Debug mode: off
Traceback (most recent call last):
  File "c:\python36\lib\runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "c:\python36\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\Python36\Scripts\flask.exe\__main__.py", line 9, in <module>
  File "c:\python36\lib\site-packages\flask\cli.py", line 894, in main
    cli.main(args=args, prog_name=name)
  File "c:\python36\lib\site-packages\flask\cli.py", line 557, in main
    return super(FlaskGroup, self).main(*args, **kwargs)
  File "c:\python36\lib\site-packages\click\core.py", line 717, in main
    rv = self.invoke(ctx)
  File "c:\python36\lib\site-packages\click\core.py", line 1137, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "c:\python36\lib\site-packages\click\core.py", line 956, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "c:\python36\lib\site-packages\click\core.py", line 555, in invoke
    return callback(*args, **kwargs)
  File "c:\python36\lib\site-packages\click\decorators.py", line 64, in new_func

    return ctx.invoke(f, obj, *args, **kwargs)
  File "c:\python36\lib\site-packages\click\core.py", line 555, in invoke
    return callback(*args, **kwargs)
  File "c:\python36\lib\site-packages\flask\cli.py", line 771, in run_command
    threaded=with_threads, ssl_context=cert)
  File "c:\python36\lib\site-packages\werkzeug\serving.py", line 814, in run_sim
ple
    inner()
  File "c:\python36\lib\site-packages\werkzeug\serving.py", line 774, in inner
    fd=fd)
  File "c:\python36\lib\site-packages\werkzeug\serving.py", line 660, in make_se
rver
    passthrough_errors, ssl_context, fd=fd)
  File "c:\python36\lib\site-packages\werkzeug\serving.py", line 577, in __init_
_
    self.address_family), handler)
  File "c:\python36\lib\socketserver.py", line 453, in __init__
    self.server_bind()
  File "c:\python36\lib\http\server.py", line 138, in server_bind
    self.server_name = socket.getfqdn(host)
  File "c:\python36\lib\socket.py", line 673, in getfqdn
    hostname, aliases, ipaddrs = gethostbyaddr(name)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0x8a in position 5: invalid
start byte