import numpy as np
import cv2

cam = cv2.VideoCapture(0)
a = cam.isOpened()
while  a :
    ret, frame = cam.read()
    if ret == True :
        frame = cv2.flip(frame, 1)
    cv2.imshow('Camera mea', frame)
    if cv2.waitKey(3) & 0xFF == 27:
           a = False

cam.release()
cv2.destroyAllWindows()