17. TODO
# ================== TODO ===================
# Modify these code to suit your need
contours = [ctr for ctr in contours if cv2.contourArea(ctr) > 100]
contours = [cv2.approxPolyDP(ctr, 5 , True) for ctr in contours]
contours = [ctr for ctr in contours if cv2.isContourConvex(ctr)]
# ============================================