Hello Everyone, I have done too much research in internet but finally found a solution myself. If you cannot create tracker suchlike tracker=cv2.TrackerKCF.create() or similar code due in jupyter environment, first you should check if you install main module package or fullpackage, if you installed only main module you should uninstall first and reinstall full package because tracking API included with extras ! . Second and final suggestion is checking numpy version, I was using numpy 1.26.0 for stability. Once ı reinstall full opencv package, I need to reinstall numpy because your existing numpy version will be changed if not compatible latest version.
Important considerations:
Latest OpenCV based on this topic date
Numpy version : 1.26.0 