List index out of range : Python :

Question

So I have a list named "enemy_pos". Inside that, I have another 2 lists. When I try to change a number from one of that 2 lists it says "list index out of range"

Here is my code:

enemy_pos = [[0, -2, -12], [0, -1, -12]]
enemy_speed = 0.2

def move():
    for i in range(2):
        enemy_pos[[i][1]] -= enemy_speed

@AnkurJyotiPhukan enemy_pos[[i][1]] even this is right syntax.Example a=[1,2,3,4,5];a[[1,2,3][0]]--->2 — Ch3steR
– Ch3steR, Commented Mar 28, 2020 at 17:29
@AnkurJyotiPhukan Not a problem. check here. You answered what OP needed, I was just saying it's correct syntax — Ch3steR
– Ch3steR, Commented Mar 28, 2020 at 17:35

HSB · Accepted Answer · 2020-03-28 17:30:06Z

2

The extra square bracket after enemy_pos in the last line is not required. It should be enemy_pos[i][1].

answered Mar 28, 2020 at 17:30

HSB

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afterburner · Accepted Answer · 2020-03-28 17:32:30Z

2

The problem you're having is because enemy_pos[[i][1]] means Get the element from enemy_pos at index [i][1], where [i][1] means get the element at index 1 from the list [i]. However, [i] only has an element at index 0, which is why you're getting List index out of range.

The correct syntax for accessing elements from nested arrays is:

enemy_pos[i][1]

Loosely speaking, it means, get the list from enemy_post at index i, and from that list, get the element at index 1.

Hope this helps

answered Mar 28, 2020 at 17:32

afterburner

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