live transform opencv frame by frame

live_transformation.py

from __future__ import division, print_function
import cv2

id_ = lambda x: x

def live_transform(transformation=id_):
    cap = cv2.VideoCapture(0)

    while True:
        ret, img = cap.read()
        cv2.imshow("input", img)

        key = cv2.waitKey(10)
        if key == 27:
            break

    cv2.destroyAllWindows()
    cv2.VideoCapture(0).release()

if __name__ == "__main__":
    live_transform()