Wrong value for 'FLANN_INDEX_KDTREE' in 'FLANN based Matcher'

[Mi-Dora]

The issue is about this code block:

# FLANN parameters
FLANN_INDEX_KDTREE = 0
index_params = dict(algorithm = FLANN_INDEX_KDTREE, trees = 5)
search_params = dict(checks=50)   # or pass empty dictionary

flann = cv2.FlannBasedMatcher(index_params,search_params)

Picture below is shown in Lawe's FLANN User Manual. The FLANN_INDEX_KDTREE should be set to 1 (kdtree), not 0(linear).
flann_manual-1.8.4.pdf

Here is using FLANN_INDEX_KDTREE = 1

And, here is using FLANN_INDEX_KDTREE = 0