import random
#随机整数
print(random.randint(0,99)) #30

#随机选取0到100间的偶数
print(random.randrange(0,101,2)) #6

#随机浮点数
print(random.random()) #0.2389361742904
print(random.uniform(1,10)) #9.8826725523743

#随机字符
print(random.choice('ahidn%$ji@#gs')) #%

#多个字符中选取特定数量的字符
print(random.sample('abcfjkshkkdmgi',3))  #['a','f','g']

#随机选取字符串
print(random.choice(['addff','dfreww','lomhf','ddrrgg'])) #addff

#随机洗牌
items = [1,2,3,4,5,6,7,8,9]
print(items) #[1,2,3,4,5,6,7,8,9]
random.shuffle(items)
print(items)  #[1,4,6,2,3,5,9,7,8]

案例随机验证码

#随机产生4位数字加字母的验证码
import random
randomcode = ''
for i in range(4):
    tmp = random.randint(0,4)
    if tmp == i:
        tmp = chr(random.randint(65,90)) #使用chr方法将整数对应的ascii码转换为字母
    else:
        tmp = random.randint(0,4)
    randomcode+=str(tmp)
print(randomcode)