如何在 python 中将 3D 列表转换为 2D 列表?

Question

这是我的代码：

[[[3], [4]], [[5], [6]], [[7], [8]]]

我怎样才能把它改成：

[[3], [4], [5], [6], [7], [8]]

？

Answer 1

您想要平展输入列表的单个级别，请使用列表推导式尝试以下解决方案：

lst = [[[3], [4]], [[5], [6]], [[7], [8]]]
[e for sl in lst for e in sl]
=> [[3], [4], [5], [6], [7], [8]]

Answer 2

试试这个：

import numpy as np
a = np.array([[[3],[4]],[[5],[6]],[[7],[8]]])
b = a.reshape(6,1)

Answer 3

未压缩或很长的路：

l3d = [[[3], [4]], [[5], [6]], [[7], [8]]]
l2d = []
for e1 in l3d:
for e2 in e1:
l2d.append(e2)

Answer 4

# Provided list
lst = [[[3], [4]], [[5], [6]], [[7], [8]]]
# To do this we are going to import chain from itertools
from itertools import chain
final = list(chain(*lst))
print(final)  # Output: [[3], [4], [5], [6], [7], [8]]