Python标准库系列之random模块
This module implements pseudo-random number generators for various distributions.
random.random()
生成0-1的小数
>>> random.random() 0.06511225392331632 >>> random.random() 0.9063480964287944 >>> random.random() 0.1255900898753961 >>> random.random() 0.6676866041289258
random.randint(a, b)
输出a和b范围内的数,包括a和b
>>> random.randint(1,2) 1 >>> random.randint(1,2) 1 >>> random.randint(1,2) 1 >>> random.randint(1,2) 2 >>> random.randint(1,2) 1 >>> random.randint(1,2) 1
random.randrange(start, stop[, step])
输出start到stop-1之间的数,可设置步长
>>> random.randrange(1,3) 2 >>> random.randrange(1,3) 1 >>> random.randrange(1,3) 2
随机验证码实例
#!/usr/bin/env python import random checkcode = '' # for循环四次 for i in range(4): # current=0-3的数字 current = random.randrange(0,4) # 如果current的值不等于i if current != i: # 通过chr把数字转换为一个字母赋值给temp temp = chr(random.randint(65,90)) else: # 否则temp=0-9之间的数字 temp = random.randint(0,9) # checkcode = checkcode + str(temp) checkcode += str(temp) # 输出字符 print(checkcode)
执行
ansheng@ansheng-me:~$ python s.py TCQ1 ansheng@ansheng-me:~$ python s.py 8L01 ansheng@ansheng-me:~$ python s.py N2EB ansheng@ansheng-me:~$ python s.py XIDO