Python默认是以ASCII作为编码方式的，如果在自己的Python源码中包含了中文（或者其他非英语系的语言），此时即使你把自己编写的Python源文件以UTF-8格式保存了，但实际上，这依然是不行的。
解决办法很简单，只要在文件开头加入下面代码就行了
# -*- coding: UTF-8 -*-
相关文章
- SyntaxError: Non-ASCII character '\xe5' in file test.py on line 1, but no encoding declared; see http://www.python.org/peps/pep-0263.html for details
- SyntaxError: Non-ASCII character '\xe5' in file index.py on line 6, but no encoding declared; see http://python.org/dev/peps/pep-0263/ for details
- python2.7报错Non-ASCII character '\xe5' in file knn.py on line 3, but no encoding declared; see http://python.org/dev/peps/pep-0263/ for details
- SyntaxError: Non-UTF-8 code starting with '\xbb' in file D:\流畅学python\ex32.py on line 1, but no encoding declared; see http://python.org/dev/peps/pep-0263/ for details