read camera with OpenCV

readCamera.py

#! /usr/bin/env python

import cv2

if __name__ == "__main__": 
	''' '''	
	camera = cv2.VideoCapture(0)
	while True:
		# cv2.VideoCapture return a tuple, (Bool, Numpy.ndarray) 
		_, im = camera.read()
		cv2.imshow("camera", im)
		if cv2.waitKey(40) > 0 : break
	print "Exit ..."

Data returned is different from C++ version, check before using.