open cv kamerayı acma

import cv2
	def show_webcam(mirror=False):
	cam = cv2.VideoCapture(0)
	while True:
	ret_val, img = cam.read()
	if mirror:
	img = cv2.flip(img, 1)
	cv2.imshow('my webcam', img)
	if cv2.waitKey(1) == 27:
	break # esc to quit
	cv2.destroyAllWindows()
	def main():
	show_webcam(mirror=True)
	if __name__ == '__main__':
	main()