I'm trying to work on QR code scanner and I get this error: pixels, width, height = image TypeError: cannot unpack non-iterable NoneType object

Question

I tried the same code few weeks ago and it worked perfectly but now I'm getting this error

pixels, width, height = image TypeError: cannot unpack non-iterable NoneType object

Edit: The issue has been resolved. The code was fine, problem was my in-built webcam. When I attached a new webcam, it worked fine.

Thank you so much for your help. This was my first question in stack

Answer 1

It most likely seems like your read() failed. You have to check if your read succeeded first and then proceed to iterate:

while True:
    success, image = capture.read()
    if success:
         for eachcode in decode(image):
          ...
    else:
        print('Capture failed')

If you still get the same error, you could as well check if decode() did not return None:

while True:
    success, image = capture.read()
    decoded_image = decode(image)
    if success and decoded_image is not None:
         for eachcode in decoded_image:
          ...
    else:
        print('Capture failed')