随机数:

打开python命令行

 

随机整数:
>>> import random
>>> random.randint(0,99)
21

随机选取0到100间的偶数:
>>> import random
>>> random.randrange(0, 101, 2)
42

随机浮点数:
>>> import random
>>> random.random() 
0.85415370477785668
>>> random.uniform(1, 10)
5.4221167969800881

随机字符:
>>> import random
>>> random.choice('abcdefg^*f')
'd'

多个字符中选取特定数量的字符:
>>> import random
random.sample('abcdefghij',3) 
['a', 'd', 'b']

多个字符中选取特定数量的字符组成新字符串:
>>> import random
>>> import string
>>> string.join(random.sample(['a','b','c','d','e','f','g','h','i','j'], 3)).r
eplace(" ","")
'fih'

随机选取字符串:
>>> import random
>>> random.choice ( ['apple', 'pear', 'peach', 'orange', 'lemon'] )
'lemon'

洗牌:
>>> import random
>>> items = [1, 2, 3, 4, 5, 6]
>>> random.shuffle(items)
>>> items
[3, 2, 5, 6, 4, 1]



字符串倒序

>>> str='http://www.google.com'
>>> print str[::-1]
moc.elgoog.www//:ptth

 

发送GET请求


01 >>> import httplib  

02 >>> conn = httplib.HTTPConnection("ycg1213.sinaapp.com")  

03 >>> conn.request("GET", "ipwork/rule_firewall.php")  

04 >>> r1 = conn.getresponse()  

05 >>> print r1.status, r1.reason  

06 200 OK  

07 >>> data1 = r1.read()  

08 >>> print data1




正则表达式模块使用

import re

搜索字符串中的ip地址,group函数将显示出匹配到的字符串,正常需要判断结果是否为空

m = re.search('\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3}', '127.0.0.1', 'url=jdbc:mysql://192.168.10.123:3306/testdb?use')

if m is not None: m.group()




替换字符串中的ip地址为127.0.0.1

print re.sub('\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3}', '127.0.0.1', 'url=jdbc:mysql://192.168.10.123:3306/testdb?use')