PyLint not recognizing cv2 members

Question

I am running pylint on an opencv project and I am getting many pylint errors in VS code about members not being present.

Example code:

import cv2
cv2.imshow(....)

Errors obtained:

However , the code runs correctly without any errors.

Versions : pylint 1.8.1 , astroid 1.6.0

Answer 1

This is from pylint. You can generate a pylint config file in the root of your project with this command: (I find this to be helpful if you work in a team or on different computers from the same repo)

pylint --generate-rcfile > .pylintrc

At the beginning of the generated .pylintrc file you will see

# A comma-separated list of package or module names from where C extensions may
# be loaded. Extensions are loading into the active Python interpreter and may
# run arbitrary code.
extension-pkg-whitelist=

Add cv2 so you end up with

# A comma-separated list of package or module names from where C extensions may
# be loaded. Extensions are loading into the active Python interpreter and may
# run arbitrary code.
extension-pkg-whitelist=cv2

Save the file. The lint errors should disappear.

Answer 2

Yes it is because the extension has not been installed. Set this: extension-pkg-whitelist=cv2 and you're good to go. However it may not detect the functions or modules implemented in cv2