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]]]

如何将其更改为：

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

Answer 1

您希望展平输入列表的单个级别，请使用列表解析来尝试此解决方案：

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：

$ ipcs -m

------ Shared Memory Segments --------
key        shmid      owner      perms      bytes      nattch     status
0x00000002 32768      myid         600        2097152    1

Answer 3

未压缩或漫长的道路：

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