输出中文文本的时候，我的会报错，后来添加了#!/usr/bin/python # -*- coding: UTF-8 -*-才输出成功，为什么老师讲的没有报错呢

C:\Users\LuGao\untitled1\Scripts\python.exe C:/PycharmProjects/untitled/hello_python.py

  File "C:/PycharmProjects/untitled/hello_python.py", line 2

SyntaxError: Non-ASCII character '\xe6' in file C:/PycharmProjects/untitled/hello_python.py on line 2, but no encoding declared; see http://python.org/dev/peps/pep-0263/ for details

Process finished with exit code 1