Looks like axvline doesn't work on the second axes correctly (See code). Also if I set ymin=0, ymax=10, ylim=(-1, 11) it draw line from bottom to the top of the axes rather than from 0 to 10. IPython ...
A Unix, Windows, Raspberry Pi Object Speed Camera using python3, opencv, video streaming, motion tracking. Includes a Standalone Web Server , Image Search using opencv template match and a whiptail ...