Checking version of OpenCV (cv)

Question

I was checking the version of OpenCV installed previously in a system. I tried to check using

from cv2 import __version__

Its gave me the following error

No module named cv2

When I tried import cv, it's not giving me error. Is there a way to know the version?

Answer 1

__version__ is a variable and a property of the package, not something you can import. The general way to do this (from script or interpreter, Python 2 or Python 3):

import cv2
print(cv2.__version__)

You can check the version number of any Python package this way using the __version__ string. Also note that if you want to know what other special __variables__ are available, you can use the dir() function on your module:

import cv2
print(dir(cv2))

Answer 2

Open a python interpreter (simply type python in your terminal).
Now, you should import cv2 and then check the special variable version.
Like this:

import cv2
cv2.__version__

For more details, check this link