python学习笔记1：序列字符串列表操作
一、字符串切片的原理
s='abcde'
for i in range(5,0,-1):
print s[0:i]
print 'dbc' in 'abcd'二、字符串模版
from string import Template
s = Template("Hello , my dear ${username}")
print s.substitute(username = 'yzh')
s="today is a great day"
print s.upper()三、三引号
errHTML = '''
<HTML><HEAD><TITLE>
Friends CGI Demo</TITLE></HEAD>
<BODY><H3>ERROR</H3>
<B>%s</B><P>
<FORM><INPUT TYPE=button VALUE=Back
ONCLICK="window.history.back()"></FORM>
Edit By Vheavens
Edit By Vheavens
</BODY></HTML>
'''
print errHTML四、unicode和编码解码
s= u"hehe"
utf8S = s.encode("utf-8")
normalS = utf8S.decode("utf-8")
print normalS五、哈希加密
import hashlib
s="yzh"
sa = hashlib.md5()
sa.update(s)
print sa.hexdigest()
sa.update("yzh1")
print sa.hexdigest()六、简易正则
import re
errHTML ='''
username:yzh
userqq:123
username:lsl
userqq:456
'''
p = re.compile("username:(.*)\suserqq:(?P\d*)",re.IGNORECASE)
m = p.finditer(errHTML)
if m:
for i in m:
print i.group("qq")本文参与 腾讯云自媒体分享计划，分享自作者个人站点/博客。
原始发表：2015-01-05 ，如有侵权请联系 cloudcommunity@tencent.com 删除
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