小编Hor*_*zon的帖子

import numpy as np
import cv2

cap = cv2.VideoCapture("slow.avi")
while not cap.isOpened():
    cap = cv2.VideoCapture("slow.avi")
    cv2.waitKey(1000)
    print "Wait for the header"

# params for ShiTomasi corner detection
feature_params = dict( maxCorners = 100,
                       qualityLevel = 0.3,
                       minDistance = 7,
                       blockSize = 7 )

# Parameters for lucas kanade optical flow
lk_params = dict( winSize  = (15,15),
                  maxLevel = 2,
                  criteria = (cv2.TERM_CRITERIA_EPS | cv2.TERM_CRITERIA_COUNT, 10, 0.03))

# Create some random colors
color = np.random.randint(0,255,(100,3))

# Take first frame and find …

在select子句中,可以在select子句中指向其他级别对象,或者是否有任何特殊关键字指向.如果不是,我怎么能用select子句解决这个问题.

list.Select(o => new ParentClass {
   ID = o.ID,                            
   ChildClass = o.Childs.Select(p => new ChildClass { 
                                     Parent = @this,
                                     ID = p.id 
                               }).ToList()
});