No module named cv2

Question

I am getting error

No module named cv2

Can you please guide what command should I type to install CV2 (sudo qpt-get install ..?) Thank you

import numpy as np
import cv2

cap = cv2.VideoCapture('vtest.avi')

while(cap.isOpened()):
    ret, frame = cap.read()

    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)

    cv2.imshow('frame',gray)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

cap.release()
cv2.destroyAllWindows()

Answer 1

you can also use conda install cv2:

conda install -c opencv3

Answer 2

use pip command line:

pip install opencv-python

Answer 3

sudo apt-get install python-openCV