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问题描述
我刚开始使用python,很快就想知道是否可以用元组索引嵌套列表.类似于:elements[(1,1)]
I just started with python and very soon wondered if indexing a nested list with a tuple was possible. Something like: elements[(1,1)]
我要执行此操作的一个示例与下面的代码相似,其中我保存了矩阵的某些位置,以后需要在称为索引的元组中访问该矩阵的位置.
One example where I wanted to do that was something similar to the code below in which I save some positions of the matrix that I will later need to access in a tuple called index.
index = ( (0,0), (0,2), (2,0), (2,2) )
elements = [ [ 'a', 'b', 'c'],
[ 'c', 'd', 'e'],
[ 'f', 'g', 'h'] ]
for i in index:
print (elements [ i[0] ] [ i[1] ])
# I would like to do this:
# print(elements[i])
这似乎是一个有用的功能.有什么办法吗?还是一个简单的替代方法?
It seems like a useful feature. Is there any way of doing it? Or perhaps a simple alternative?
推荐答案
是的,您可以这样做.我写了一个类似的例子:
Yes, you can do that. I wrote a similar example:
index = [ [0,0], [0,2], [2,0], [2,2] ]
elements = [ [ 'a', 'b', 'c'],
[ 'c', 'd', 'e'],
[ 'f', 'g', 'h'] ]
for i,j in index:
print (elements [ i ] [ j ])
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