python解决SyntaxError: Non-ASCII character 'xe6'

出现情况，输入如下一个函数demo:

run,报错:

SyntaxError: Non-ASCII character 'xe6' in file /Users/XX/PycharmProjects/lesson1Python/pythonTest/ts.py on line 3, but no encoding declared; see http://python.org/dev/peps/pep-0263/ for details

如何解决？

原因：是因为Python在默认状态下不支持源文件中的编码所致

解决：添加

# coding=utf-8

 
再次运行，成功