PyObjC show warnings when classes called

Question

Pyobjc does not support classes, and show warnings when I call them.

I use:

• macOS Big Sur 11.7.4

• Python 3.10 interpreter

• PyCharm as code redactor.

I installed pyobjc via this command:

pip3 install -U pyobjc==9.0.1 pyobjc-core==9.0.1

I wrote a small script for determining the mouse location on the screen.

import AppKit, Quartz
location = AppKit.NSEvent.mouseLocation() # Cannot find reference 'NSEvent' in '__init__.py |                          __init__.py'
position = (round(location.x), round(Quartz.CGDisplayPixelsHigh(0) - round(location.y)))# Cannot find reference 'CGDisplayPixelsHigh' in '__init__.py | __init__.py | imported module Quartz'

However, I got mouse location, but warnings:

Cannot find reference 'NSEvent' in '__init__.py | __init__.py'
Cannot find reference 'CGDisplayPixelsHigh' in '__init__.py | __init__.py | imported module Quartz

How can I remove them?