简单随机验证码生成

random 模块学习

纯数字4位验证码：

import random
checkcode=''
for i in range(4):
    current=random.randint(1,9)
    checkcode+=str(currenmt)
print (checkcode)

数字+大写字母 4位验证码

import random
checkcode=''
for i in range(4):
    current=random.randint(1,4)
    if  current=i:
            tmp=chr(random.randint(65,90))
    else:
            tmp=random.randint(0,9)
    checkcode+=str(tmp)
print (checkcode)

数字+小写字母  4位验证码

import random
checkcode=''
for i in range(4):
    current=random.randint(0,4)
    if current=i:
        tmp=chr(random.randint(97,122))
    else:
        tmp=random.randint(0,9)
    chechcode+=str(tmp)
print (checkcode)

数字+大写+小写 4位验证码：

import random
checkcode=''
for i in range(0,4):
    current=random.randint(0,4)
    if current == 1:
        tmp=chr(random.randint(64,90))
    elif current ==2:
        tmp = chr(random.randint(97.122))
    else :
        tmp=random.randint(0,9)
        checkcode+=str(tmp)
print (checkcode)

用 if进行判断。可以多种验证码。