非UTF-8问题

为什么我在cmd 上输入python server_pro.py后会出现
(myenv) D:\podlm-public-main>python server_pro.py
  File "server_pro.py", line 405
SyntaxError: Non-UTF-8 code starting with '\xe8' in file server_pro.py on line 405, but no encoding declared; see http://python.org/dev/peps/pep-0263/ for details
这个问题？？？？望求解