OpenCV's waitKey() alternative in IPython Notebook

Question

I'm trying to show images with cv2 library in my Jupiter Notebook with cv2.imshow(img) and it shows as expected, but I can not use or don't know how to use cv2.waitKey(0), hence the cell will not stop executing.

cv2.waitKey(0) works in script, but not in Notebook.

Here's a snippet:

cv2.imshow('Image', img)
cv2.waitKey(0)
cv2.destroyAllWindows()

How do I stop executing cell without restarting the whole kernel?

Answer 1

So, thanks to @Micka, here's the solution:

You must write cv2.startWindowThread() first, explained here.