I am new to Python and have a question about module PIL

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Python

from PIL import Image
file_name = "colors.png"
img = Image.open(file_name)
pixels = img.load()
width, height = img.size
print(img.size)
for x in range(width):
    for y in range(height):
        print(x, y)

The img.size = 130,130

but the maximum pixel count only reaches 129,129? and when I try to do 130,130 manually I get a Index error, can someone explain why the image size is not equal to the pixel count?

What I have tried:

Im just really confused and want to know why

Posted 14-Aug-22 2:24am

Ididhejejdj Ididhejejdj

Updated 14-Aug-22 3:59am

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OriginalGriff · Accepted Answer · 2022-08-14T03:59:00

"Index out of range" means exactly what it says: the collection you are indexing into does not have enough elements to cover the index value you are using.
In Python, indexes run from 0 to N - 1, where N is the number of values in the collection. So it you have a list containing three strings, the only valid indexes are 0, 1, and 2 - any other number will throw an "out of range" exception.
So in your case, when the pixel count exceeds 129, you get your error.

We don't have your data, which means we can't run your code under the same circumstances you do.
So, it's going to be up to you.
Fortunately, you have a tool available to you which will help you find out what is going on: the debugger. How you use it depends on your compiler system, but a quick Google for the name of your IDE and "debugger" should give you the info you need.

Put a breakpoint on the first line in the function, and run your code through the debugger. Then look at your code, and at your data and work out what should happen manually. Then single step each line checking that what you expected to happen is exactly what did. When it isn't, that's when you have a problem, and you can back-track (or run it again and look more closely) to find out why.

Sorry, but we can't do that for you - time for you to learn a new (and very, very useful) skill: debugging!