Why it doesn't work?

Question

n = input().split(" ") # n = ['2', '3', '4']
print(n.index(2))

Answer 1

use "n = [int(i) for i in input().split()]" or "print(n.index('2')"

Answer 2

n = list(input())#splits the input into a list containing each character
print(n[1]) #prints out the char
#[0] for 1st char
#[1] for 2nd char

try this

Answer 3

The list elements are strings

print(n.index( '2' )

will work