CAPTURING AN IMAGE FROM CAMERA WHEN KEY 0 PRESSED

import cv2 camera_port=0#camera number camera = cv2.VideoCapture(camera_port)#simply activates the camera section for i in xrange(30):        #avoides first 30 images     retval, f= camera.read() while True:     cv2.imshow(“preview”, f)     retval, f = camera.read()     if cv2.waitKey(1)== 48: # ascii code of number 0         cv2.destroyAllWindows()         break cv2.imwrite(“test1.jpg”,f) cv2.imshow(‘image’,f) cv2.waitKey(0) cv2.destroyAllWindows() del(camera)