random模块

print(random.random())       #0到1的浮点型
print(random.randint(1,6))   #1到6的整型
print(random.randrange(1,6)) #1到6的整型，不取6
print(random.choice([1,4,7,2,‘33‘,[2,3]]))   #随机取一个
print(random.sample([1,4,7],2))       #随机取两个
print(random.uniform(2,4))    #2到4的浮点型

a = [1,2,3]            #打乱a数组
random.shuffle(a)
print(a)

结果：

0.2782936470860382
5
5
7
[7, 4]
2.736930621547071
[2, 3, 1]

def v_code():
    res = ‘‘
    for i in range(6):
        num = random.randint(0,9)
        res += str(num)
    return res
print(v_code())
结果：696520

def v_code():
    res = ‘‘
    for i in range(6):
        num = random.randint(0,9)
        char = chr(random.randint(65,122))   //chr(65)为‘A‘,chr(122)为‘z‘
        s = str(random.choice([num,char]))   //从两个元素（一个数字，一个字母）的数组中随机取一个
        res += s
    return res
print(v_code())
结果：s0309l