“切片"一个数变成三个随机数 [英] "Slice" a number into three random numbers

问题描述

我需要生成一个每行(10 行)填充三个随机"值的文件，但这些值的总和必须等于 15.

I need to generate a file filled with three "random" values per line (10 lines), but those values sum must equal 15.

结构为:INDEX A B C".

The structure is: "INDEX A B C".

示例:

1 15 0 0
2 0 15 0
3 0 0 15
4 1 14 0
5 2 13 0
6 3 12 0
7 4 11 0
8 5 10 0
9 6 9 0
10 7 8 0

推荐答案

如果数字可以任意组合使用:

If the numbers can by any just use combinations:

from itertools import combinations
with open("rand.txt","w") as f:
    combs = [x for x in combinations(range(16),3) if sum(x ) == 15 ][:10]   
    for a,b,c in combs:
        f.write("{} {} {}\n".format(a,b,c))

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