如何编写给定代码的列表理解? [英] How do i write the list comprehension for the given code?

问题描述

我是python的新手.

I am fairly new to python.

l = []    
for i in range(x+1):
    for j in range(y+1):
        for k in range(z+1):
            if i+k+j!=n:
                l.append([i,j,k])

我尝试过:

l = [[[i for i in range(x+1)] for j in range(y+1)] for k in range(z+1) if i+j+k != n]

但是它不起作用.

推荐答案

嵌套列表的理解可能有些棘手.您需要将三个元组追加到列表中.所以这意味着理解的第一部分应该是(i，j，k)

Nested list comprehensions can be a bit tricky. You need a three tuple to be appended to your list. So that means the first part of the comprehension should be (i,j,k)

[ (i,j,k) for i in range(x+1) for j in range(y+1) for k in range(z+1) if i+j+k != n]

然后，您需要将该追加添加到列表中，以i + j + k不等于n为条件.到if条件结束时.两者之间不应有任何其他[或].

Then you need that append to be list to be conditional upon i+j+k not being equal to n. To the if condition comes at the end. There shouldn't be any other [ or ] in between.

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