方法一，大小寫(xiě)字母+數(shù)字：

            
              import random
import string 
 
ran_str = ''.join(random.sample(string.ascii_letters + string.digits, 8))
print ran_str

            
          

方法二，大小寫(xiě)字母+數(shù)字+特殊字符：
應(yīng)用python random標(biāo)準(zhǔn)庫(kù)做一個(gè)隨機(jī)生成密碼的程序，可以隨機(jī)生成任意多個(gè)字符。(基于python2.7，如果是python3需要修改下)

            
              #-*-coding:utf-8 -*-
#author：wangxing

import random
import string
import sys

#存儲(chǔ)大小寫(xiě)字母和數(shù)字，特殊字符列表
STR = [chr(i) for i in range(65,91)]   #65-91對(duì)應(yīng)字符A-Z
str = [chr(i) for i in range(97,123)]   #a-z
number = [chr(i) for i in range(48,58)]  #0-9

#特殊字符串列表獲取有點(diǎn)不同
initspecial = string.punctuation      #這個(gè)函數(shù)獲取到全部特殊字符，結(jié)果為字符串形式
special = []                          #定義一個(gè)空列表

#制作特殊符號(hào)列表
for i in initspecial:
    special.append(i)

total = STR + str + number + special
#print total
choices = ['6','8','10','16']

def Randompassword(your_choice):
    if your_choice in choices:
        passwordli = random.sample(total,int(your_choice))       ##sample函數(shù)作用是取幾個(gè)列表里的值并返回一個(gè)新列表，此處得到的是列表需要轉(zhuǎn)換為字符串顯示出來(lái)
        passwordst = ''.join(passwordli)                    #現(xiàn)在得到的是轉(zhuǎn)換后的字符串 ‘’是分隔符，里面可以為; : . 等等
        print "\033[32m生成的\033[0m" + your_choice + "\033[32m位數(shù)密碼為:\033[0m\n" + passwordst

    else:
        print "\033[31m請(qǐng)輸入指定位數(shù)(6,8,10,16) \033[0m"

if __name__ == '__main__':
    while True:
        choice = raw_input("\033[33m請(qǐng)輸入你要得到隨機(jī)密碼的位數(shù)：(6,8,10,16)，或輸入q退出\033[0m\n")
        if choice != 'q':          #輸入q則退出循環(huán)
            Randompassword(choice)      #執(zhí)行函數(shù)
        else:
            break

            
          

方法三，字母+數(shù)字：

            
              #!/usr/bin/env python
# -*- coding=utf-8 -*-


import random, string        #導(dǎo)入random和string模塊
 
def GenPassword(length):
    #隨機(jī)出數(shù)字的個(gè)數(shù)
    numOfNum = random.randint(1,length-1)
    numOfLetter = length - numOfNum
    
    #選中numOfNum個(gè)數(shù)字
    slcNum = [random.choice(string.digits) for i in range(numOfNum)]
    
    #選中numOfLetter個(gè)字母
    slcLetter = [random.choice(string.ascii_letters) for i in range(numOfLetter)]
    
    #打亂組合
    slcChar = slcNum + slcLetter
    random.shuffle(slcChar)
    
    #生成隨機(jī)密碼
    getPwd = ''.join([i for i in slcChar])
    return getPwd
 
if __name__ == '__main__':
    print GenPassword(6)