Python/Shell 正则表达式与运用

#!/bin/bash str="date:2017-11-28 os:centos blackbord:blog" echo $str | grep centos --color
echo $str | grep -oE centos --color
#组的使用
echo $str | sed -rne 's/.*(date:[0-9]{4}-[0-9]{2}-[0-9]{2}).*(blackbord:[a-z]+).*/group:\1 group:\2/p'

date:-- os:centos blackbord:blog
centos
group:date:-- group:blackbord:blog

#coding=utf-8
import re str1="line:20 date(2017-11-28) os:centos blackbord[blog] last" matchobj = re.search("(date\(\d+-\d+-\d+\)).*(os:[a-z]+).*(blackbord\[[a-z]+\])", str1)
if matchobj:
num = len(matchobj.groups())
print "match_len:" + str(num)
print matchobj.groups() date = matchobj.group(1) #date(2017-11-28)
date = date[5:len(date)-1]
os = matchobj.group(2) #os:centos
os = os[3:]
blackbord = matchobj.group(3) #blackbord[blog]
blackbord = blackbord[10:len(blackbord) -1 ]
print("date:%s\nos:%s\nblackbord:%s" % (date, os, blackbord))
else:
print "not match str1"

match_len:
('date(2017-11-28)', 'os:centos', 'blackbord[blog]')
date:--
os:centos
blackbord:blog