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# 递归遍历
def traversing(ndim_list):
for i in ndim_list:
if type(i) != list:
print(i)
else:
traversing(i)
a = [[[1, 1], [2, 2]], [[3, 3], [4, 4]]]
traversing(a)
运行结果：
1
1
2
2
3
3
4
4