TypeError: cannot unpack non-iterable int object occurring with grayscale file

Question

I want to convert a file to grayscale in python using PIL and then get the x,y and rgb value of the pixels but I am getting an error.

Code:

from PIL import Image,ImageOps
file_name = "test.png"
og_image = Image.open(file_name)
gray_image = ImageOps.grayscale(og_image)
gray_scalefile = f"{file_name[:-3]}gray.png"
gray_image.save(gray_scalefile)
img = Image.open(gray_scalefile)
pixels = img.load() 
width, height = img.size
for x in range(width):
    for y in range(height):
        r, g, b = pixels[x, y]
        print(x, y, f"{r},{g},{b}")

contents of text.png:

contents of text.gray.png:

The code works fine with the text.png but when I grayscale it just doesn't work and gives me this error.

Traceback (most recent call last):
  File "d:\Image Manipulation\Image Manipulation.py", line 12, in <module>
    r, g, b = pixels[x, y]
TypeError: cannot unpack non-iterable int object

Answer 1

file_name = "test.jpg"
og_image = Image.open(file_name)
gray_image = ImageOps.grayscale(og_image)
gray_scalefile = f"{file_name[:-3]}gray.jpg"
gray_image.save(gray_scalefile)
img = Image.open(gray_scalefile).convert('RGB')
pixels = img.load()
width, height = img.size
for x in range(width):
    for y in range(height):
        r,g,b= pixels[x, y]
        print(x, y, f'{r},{g},{b}')

This will work, cause it converts Luminescence to rgb first