TypeError: Incorrect type of self (must be 'Feature2D' or its derivative) code example

Example: TypeError: Incorrect type of self (must be 'Feature2D' or its derivative)

# there is a bug (in the wrappers) here, the correct invocation has to be:
detector = cv.SimpleBlobDetector_create()
# (same problem with ORB,AKAZE, anything from features2d)