ValueError                                Traceback (most recent call last)
<ipython-input-5-406df5a4c3f2> in <module>
    373 
    374 if __name__ == "__main__":
--> 375     main()

<ipython-input-5-406df5a4c3f2> in main()
    363         copy = img.copy()
    364         img = rotated(img)
--> 365         img, rotRect, drawn = codeDetection(img)
    366 
    367         finalCode = 'QR Code'

<ipython-input-5-406df5a4c3f2> in codeDetection(img)
     63         # Finding the biggest contour, which
     64         # should be our code
---> 65         c = max(contours, key = cv2.contourArea)
     66 
     67         # Gets the bounding co-ordinates of the

ValueError: max() arg is an empty sequence