运行python程序时出现错误“SyntaxError: Non-ASCII character '\xe8' in file variable.py on line 1, but no encod”

创建python程序源文件：variable.py

counter = 100 #赋值整型变量

miles = 1000.0 #浮点型
name = "John" #字符串
print counter
print miles
print name

运行该python文件：

python variable.py

运行报错：

File "variable.py", line 1
SyntaxError: Non-ASCII character '\xe8' in file variable.py on line 1,

but no encoding declared; see http://python.org/dev/peps/pep-0263/ for details

看出错原因是没有编码声明，在源代码文件中添加编码声明：

# -*- coding: utf-8 -*-
counter = 100 #赋值整型变量
miles = 1000.0 #浮点型
name = "John" #字符串
print counter
print miles
print name

此时再运行程序，即可得到正确结果

python variable.py
100
1000.0
John