SyntaxError: Non-ASCII character '\xbd'

最近在看

执行程式时发生了这一类的问题：

Traceback (most recent call last):
  File “<stdin>”, line 1, in <module>
  File “D:\source\python\CH3\ex3-2.py”, line 1
SyntaxError: Non-ASCII character ‘\xbd’ in file D:\source\python\CH3\ex3-2.py on
 line 1, but no encoding declared; see http://www.python.org/peps/pep-0263.html
for details

我只好点这个http://www.python.org/peps/pep-0263.html连结去看，有点雾煞煞的，感觉应该是程式编码的问题，后来我直接用IDLE(Python GUI)去执行又可以执行，但是储存的时候会出现