打开摄像头

Python OpenCV打开摄像头，视频窗口点击鼠标左键或按q键退出。

import cv2clicked = Falsedef onMouse(event, x, y, flags, param):    global clicked    if event == cv2.EVENT_LBUTTONUP:        clicked = Truecap = cv2.VideoCapture(0)cv2.namedWindow('CameraWindow')cv2.setMouseCallback('CameraWindow', onMouse)while not clicked:    # get a frame    ret, frame = cap.read()    #show a frame    cv2.imshow("CameraWindow", frame)        if cv2.waitKey(1) & 0xFF == ord('q'):        breakcap.release()cv2.destroyAllWindows()