删除列表列表中的空列表元素

Question

我有一个嵌套列表，如下所示。

[['eggplant', ['little', 'added']],
 ['proportions', ['limited', 'vegetables']],
 ['vegetables', ['proportions']],
 ['foods', ['other']],
 ['meat', []],
 ['starch', []]]

我正在尝试过滤掉具有与之关联的 []（空）元素的列表。所以我想要的输出是

[['eggplant', ['little', 'added']],
 ['proportions', ['limited', 'vegetables']],
 ['vegetables', ['proportions']],
 ['foods', ['other']]]

Answer 1

快速完成用作过滤器的列表理解：

a = [['eggplant', ['little', 'added']],
 ['proportions', ['limited', 'vegetables']],
 ['vegetables', ['proportions']],
 ['foods', ['other']],
 ['meat', []],
 ['starch', []]]

b = [x for x in a if x[1]]

for x in b:
    print(x)

打印：

['eggplant', ['little', 'added']]
['proportions', ['limited', 'vegetables']]
['vegetables', ['proportions']]
['foods', ['other']]

删除列表列表中的空列表元素

Removing the empty list element within a list of lists

python

nested-lists