如何从列表列表中删除 nan？

Question

我试图从列表列表中删除所有 nan，我的数据如下：

[[1,2,3,nan,nan,nan],[4,5,nan],[9,8,7,6,5,4,3,nan,nan,nan,nan,nan]]

我尝试从这里的答案中执行此操作（如何从列表列表中删除 [NaN]？）：

import math
l = [[1,2,3,np.nan,np.nan,np.nan],[4,5,np.nan],[9,8,7,6,5,4,3,np.nan,np.nan,np.nan,np.nan,np.nan]]
[xs for xs in l if not any(math.isnan(x) for x in xs)]

但它删除了整个列表，而不仅仅是 nan 的列表

Answer 1

尝试迭代列表并使用 numpy 的isnan方法构建新列表。

import numpy as np
nan = np.nan
l = [[1,2,3,nan,nan,nan],[4,5,nan],[9,8,7,6,5,4,3, nan, nan, nan, nan, nan]]
[[x for x in y if not np.isnan(x)] for y in l]