Camera capture with Python + OpenCV

import cv2
def capture_camera(mirror=True, size=None):
    """Capture video from camera"""
    #Capture the camera
    cap = cv2.VideoCapture(0) #0 is the camera device number

    while True:
        #ret gets image success flag
        ret, frame = cap.read()

        #Whether it looks like a mirror
        if mirror is True:
            frame = frame[:,::-1]

        #Resize frame
        #size is, for example(800, 600)
        if size is not None and len(size) == 2:
            frame = cv2.resize(frame, size)

        #Show frame
        cv2.imshow('camera capture', frame)

        k = cv2.waitKey(1) #Wait 1msec
        if k == 27: #Exit with ESC key
            break

    #Release the capture
    cap.release()
    cv2.destroyAllWindows()

$ python
>>> capture_camera()

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