Traceback (most recent call last):
File "how_to_use_opencv_in_python.py", line 103, in <module>
img3 = cv2.drawMatches(img1, kp1, img2, kp2, matches[:10], flags=2)
TypeError: Required argument 'outImg' (pos 6) not found
Solution: http://stackoverflow.com/questions/31631352/typeerror-required-argument-outimg-pos-6-not-found
I suggest the admin to upgrade the doc.