I have a TypeError in Python script

Question

I have write this short code:

from cv2 import cv2

img = cv2.imread("1.png")

print("Высота:"+str(img.shape[0]))
print("Ширина:" + str(img.shape[1]))
print("Количество каналов:" + str(img.shape[2]))

for x in img.shape[0]:
    for y in img.shape[1]:
        if img[x, y] == (255, 255, 255):
            img[x, y] = (0, 0, 0)

cv2.imwrite("result.png", img)

And I have this error:

Traceback (most recent call last):
  File "e:\Projects\Captcha Decrypt\main.py", line 9, in <module>
    for x in img.shape[0]:
TypeError: 'int' object is not iterable

Can you solve this problem?

The error message is pretty clear, isn't it? img.shape[0] is an integer not an iterable (list, dict, etc.) — Jan
– Jan, Commented Jun 5, 2021 at 12:10
Regarding the print you wrote just before, you can see that img.shape[0] is an INT, how do you want ot iterate on it ? From 0 to that value ? use a range for that — azro
– azro, Commented Jun 5, 2021 at 12:11

TheEagle · Accepted Answer · 2021-06-05 12:13:02Z

1

The error says it all: you are trying to iterate over a number, which is not possible, you can only iterate over objects having implemented the __iter__ or __next__ method. If img.shape[0] is for example 100, and you want to iterate a hundred times, you should use a range instead. That's basically a list of numbers, over which you can then iterate. Try this one:

from cv2 import cv2

img = cv2.imread("1.png")

print("Высота:" + str(img.shape[0]))
print("Ширина:" + str(img.shape[1]))
print("Количество каналов:" + str(img.shape[2]))

for x in range(img.shape[0]):
    for y in range(img.shape[1]):
        if img[x, y] == (255, 255, 255):
            img[x, y] = (0, 0, 0)

cv2.imwrite("result.png", img)

answered Jun 5, 2021 at 12:13

TheEagle

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1 Comment

TheEagle Over a year ago

@РостиславРоманец No need to add a comment Thanks. It is working, instead, rather accept and optionally upvote my answer ! ;)

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