如何用Python编写下列程序

用Python

# 考察排列组合
s = input("请输入四个数（以单个空格分隔）：")
samples = [int(item) for item in s.split(" ")]
for num in samples:
    if num == 0:
        continue
    for num2 in samples:
        if    num == num2:
            continue
        for num3 in samples:
            if num3 == num2 or num3 == num:
                continue
            print(str(num) + str(num2) + str(num3))

这个考察的是随机数啊