How to import specific function from cv2 (opencv)?

Question

How can I import only a specific function from cv2 (opencv) in python? I need only these function:

cv2.matchTemplate
cv2.minmaxLOC
cv2.cvtColor
cv2.color_RGB2BGR
cv2.TM_COEFF_NORMED
cv2.imread

I ask this question because I use pyinstaller --onefile to make python project one exe only. With standard import cv2 file is just too big (over 50mb).

Answer 1

You can import the specific functions with from library import function

In your case, you can use;

from cv2 import matchTemplate, minMaxLoc, cvtColor, COLOR_RGB2BGR, TM_CCOEFF_NORMED, imread