Maximum value of a list according to another list in Python

Question

I have two lists res2 and Cb. I want to print maximum value according to an operation as shown below but I am getting an error. I present the expected output.

res2=[3, 4, 6]
Cb=[[0,10,20,30,40,50,60]]

for i in range(0,len(res2)):
    Max=max(Cb[0][res2[i]])
    print(Max)

The error is

in <module>
    Max=max(Cb[0][res2[i]])

TypeError: 'int' object is not iterable

The expected output is

Asked By: leftliberal123

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Source

Answer 1

IIUC, you want to slice Cb[0] with res2, then get the max.

You could use:

from operator import itemgetter

res2 = [3, 4, 6]
Cb = [[0,10,20,30,40,50,60]]

out = max(itemgetter(*res2)(Cb[0]))

Or:

out = max(Cb[0][i] for i in res2)

Output: 60

Answered By: mozway

Maximum value of a list according to another list in Python

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