Returning the index of max value in a list considering another list as a allowed index in python

Question

I want to know the index of maximum element in list "b", considering list "a" which shows the available indexes of list "b". For example:

a = [1,3,4]
b = [20,15,13,60,50,40]

so considering maximum value among (15, 60, 50) the outcome must be the 3 (the index of element 60 in list b).

How did you approach it? Whats the code you have written? – fractal397 Jan 27 '22 at 11:54 — fractal397, Jan 27 '22 at 11:54

score 6 · Accepted Answer · answered Jan 27 '22 at 11:56

6

Use the key argument for max:

max(a,key = lambda i: b[i]) #3

answered Jan 27 '22 at 11:56

John Coleman

1 Answers1