python密码生成脚本

1. Python自带常量(本例中改用这个，不用手工定义了) 
   string.digits          #十进制数字：0123456789 
   string.octdigits       #八进制数字：01234567 
   string.hexdigits       #十六进制数字：0123456789abcdefABCDEF 
   string.ascii_lowercase #小写字母(ASCII)：abcdefghijklmnopqrstuvwxyz 
   string.ascii_uppercase #大写字母(ASCII)：ABCDEFGHIJKLMNOPQRSTUVWXYZ 
   string.ascii_letters   #字母：(ASCII)abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ 
   string.punctuation     #标点符号：!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~

#!/usr/bin/python
#coding=utf8
from random import choice
import string,sys
passwd_seed = string.digits + string.ascii_lowercase + string.ascii_letters + string
.punctuation

"""function to generate a passwd"""
def get_passwd(passwd_length=10): ####默认值
    passwd = []
    while len(passwd) < passwd_length:
        passwd.append(choice(passwd_seed))
        password=''.join(passwd)
    #password=password.replace("'","\\\'")###这里是为了转义引号，在传入md5加密时遇到引号不识别
    #password=password.replace('"','\\\"')###
    return password
if __name__ == "__main__":
    if len(sys.argv) == 1:
        print get_passwd()
    else:
        length = int(sys.argv[1])
        print get_passwd(length)