#!/usr/bin/env python
#coding:utf8
import random
#方法1：
str_code='zxcvbnmasdfghjklqwertyuiopZXCVBNMASDFGHJKLQWERTYUIOP0123456789'
new_code=''
for i in range(4):
new_code+=random.choice(str_code)
print new_code
#方法2：
new_code=[]
def str_code(len=4):
for i in xrange(97,123):
new_code.append(chr(i))
for i in xrange(65,91):
new_code.append(chr(i))
for i in xrange(10):
new_code.append(str(i))
print ''.join(random.sample(new_code,len))
str_code()
#方法3：
def code(randomlength=32):
str = ""
chars = "AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz0123456789"
length = len(chars) - 1
for i in range(randomlength):
str += chars[random.randint(0, length)]
return str
code()
)
