python开头的coding设置

缘起：

[root@CentOS7 code]# python multi_thread_mfw.py 
  File "multi_thread_mfw.py", line 138
SyntaxError: Non-ASCII character '\xe5' in file multi_thread_mfw.py on line 138, but no encoding declared; see http://www.python.org/peps/pep-0263.html for details

写完python代码运行时，报类似SyntaxError: Non-ASCII character ‘\xe5’ in file *.py，
基本可以断定，python文件开头未设置coding=utf-8。

#!/usr/bin/python
# coding=utf-8

# TODO: anything

或者：

#!/usr/bin/python
# -*- coding:utf-8 -*-

# TODO: anything

vim语法

vim中对python语法高亮，正则匹配规则：

\%^.*\n.∗\?#.*coding[:=]\s*[0-9A-Za-z-_.]\+.*$  

相关参考

PEP-0263 关于的编码声明的解释

http://www.python.org/dev/peps/pep-0263/