求助： win10 下新建 flask，运行报错 UnicodeDecodeError 的问题

配置好环境学习 flask，直接运行出现

UnicodeDecodeError: 'utf-8' codec can't decode byte 0xbf in position 0: invalid start byte

报错问题，看完报错提示一脸懵逼，然后以为是环境没配好，使用

conda create -n your_env_name python=3.6

创建新的环境还是如此，百度 Google 无果后，于是想请求下大家，应该如何解决？

代码部分：

from flask import Flask

app = Flask(__name__)


@app.route('/')
def hello_world():
    return 'Hello World!'


if __name__ == '__main__':
    app.run()

报错内容：

D:\ProgramData\Anaconda3\python.exe D:/Work/flask_demo/flask_demo.py
 * Serving Flask app "flask_demo" (lazy loading)
 * 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 "D:/Work/flask_demo/flask_demo.py", line 12, in <module>
    app.run()
  File "D:\ProgramData\Anaconda3\lib\site-packages\flask\app.py", line 943, in run
    run_simple(host, port, self, **options)
  File "D:\ProgramData\Anaconda3\lib\site-packages\werkzeug\serving.py", line 814, in run_simple
    inner()
  File "D:\ProgramData\Anaconda3\lib\site-packages\werkzeug\serving.py", line 774, in inner
    fd=fd)
  File "D:\ProgramData\Anaconda3\lib\site-packages\werkzeug\serving.py", line 660, in make_server
    passthrough_errors, ssl_context, fd=fd)
  File "D:\ProgramData\Anaconda3\lib\site-packages\werkzeug\serving.py", line 577, in __init__
    self.address_family), handler)
  File "D:\ProgramData\Anaconda3\lib\socketserver.py", line 453, in __init__
    self.server_bind()
  File "D:\ProgramData\Anaconda3\lib\http\server.py", line 138, in server_bind
    self.server_name = socket.getfqdn(host)
  File "D:\ProgramData\Anaconda3\lib\socket.py", line 673, in getfqdn
    hostname, aliases, ipaddrs = gethostbyaddr(name)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xbf in position 0: invalid start byte