I am using the CreateTrackBar function in OpenCV to create a trackbar. But I don't want any callback to happen on change. I will be doing that in a separate loop where I get the trackbar value using cv2.getTrackbarPos(). But Python returns an error if I don't give a callable function as an argument to CreateTrackBar(). The documentation for OpenCV says :
If the callback is the NULL pointer, no callbacks are called, but only value is updated.
I am guessing that is for the C++ implementation. Is there a similar null pointer or a null or None function in Python? I understand that I can just make a function that does nothing. Just seeing if there is a more elegant way of doing this. I tried None and got the error that None is not callable.
import cv2
cv2.namedWindow("Window")
cv2.createTrackbar("Value", "Window", 100, 255, None)
#Do stuff here in a while loop
cv2.waitKey(0)
cv2.destroyAllWindows()