我想init一个mxn的2D list,然后每个element又是一个空的list
我这样写(假设m=n=3)
a = [[[]]*3 for _ in range(3)]
print(a)
a[0][0].append(1)
print(a)
然后
[[[], [], []], [[], [], []], [[], [], []]]
[[[1], [1], [1]], [[], [], []], [[], [], []]]
???
我想要的是
[[[1], [], []], [[], [], []], [[], [], []]]
我哪里写错了吗==
圣我不会py了 加入不了py邦