Python中使用正则表达式

转自：http://my.oschina.net/flynewton/blog/8900

《Python unix与linux系统管理指南》学习笔记

Python中使用正则表达式，应该要养成创建编译后的正则表达式的习惯，使用方法如下：

#!/usr/bin/env pythonimport redef run_re():    pattern = 'ERROR'    re_obj = re.compile(pattern)    infile = open('/home/udb/jt.txt', 'r')    match_count = 0    lines = 0    for line in infile:        match = re_obj.search(line)        if match:            match_count += 1        lines += 1    return (lines, match_count)if __name__ == "__main__":    lines, match_count = run_re()    print 'LINES--->', lines    print 'MATCHES--->', match_count

常用的正则表达式方法有findall(), finditer(), match(), search()