关于python程序编写

Question

想问问这个程序怎么编
（自己编出来的程序会漏掉几个）

Answer 1

data=[]
for each in range(1,4):
    second=list(filter(lambda x:x!=each,range(4)))
    for i in second:
        third=list(filter(lambda x:x!=each and x!=i,range(4)))
        for j in third:
            data.append(each*100+10*i+j)
for each in range(len(data)):
    print(data[each],end=' ')
    if each%10==9:
        print('\n',end='')