camview.py

#!/usr/bin/env python
'''
OpenCV WebCam Viewer
Reference: http://stackoverflow.com/questions/2601194/displaying-webcam-feed-using-opencv-and-python
'''

import cv2

def camview(name):
    cv2.namedWindow(name)
    vc = cv2.VideoCapture(0)
    if vc.isOpened():
        print('Type ESC to dismiss the camera window')
        rv, img = vc.read()
        while rv:
            cv2.imshow(name, img)
            rv, img = vc.read()
            key = cv2.waitKey(20)
            if key == 27:
                break
        cv2.destroyWindow(name)
    else:
        print('No camera available')

if __name__ == '__main__':
    camview('Camera')