OpenCV Members are not recognized

[LambdaScorpii]

Bug description

when working with cv2 and saving files, PyLint does complain it cannot find the cv2 members, hence, flooding the Problems tab with messages, which are in fact no problem at all. Below is a MWE to reproduce some of the messages.

"""Minimum Working Example showing the issue that PyLint does not recognize cv2 Members"""

import cv2

cap = cv2.VideoCapture("test.mp4")
background_substractor = cv2.createBackgroundSubtractorMOG2()

ret, frame = cap.read()
foreground_mask = background_substractor.apply(frame)
contours, hierarchy = cv2.findContours(
    foreground_mask, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE
)

cv2.destroyAllWindows()
cap.release()

Configuration

No response

Command used

VSCode PyLint Extension

pylint --reports=n --output-format=json --clear-cache-post-run=y --from-stdin opencv_mwe_pylint_err.py

Pylint output

[
{
"type": "error",
"module": "object_tracker.opencv_mwe_pylint_err",
"obj": "",
"line": 5,
"column": 6,
"endLine": 5,
"endColumn": 22,
"path": "poc\object_tracker\opencv_mwe_pylint_err.py",
"symbol": "no-member",
"message": "Module 'cv2' has no 'VideoCapture' member",
"message-id": "E1101"
},
{
"type": "error",
"module": "object_tracker.opencv_mwe_pylint_err",
"obj": "",
"line": 6,
"column": 25,
"endLine": 6,
"endColumn": 59,
"path": "poc\object_tracker\opencv_mwe_pylint_err.py",
"symbol": "no-member",
"message": "Module 'cv2' has no 'createBackgroundSubtractorMOG2' member",
"message-id": "E1101"
},
{
"type": "error",
"module": "object_tracker.opencv_mwe_pylint_err",
"obj": "",
"line": 11,
"column": 22,
"endLine": 11,
"endColumn": 38,
"path": "poc\object_tracker\opencv_mwe_pylint_err.py",
"symbol": "no-member",
"message": "Module 'cv2' has no 'findContours' member",
"message-id": "E1101"
},
{
"type": "error",
"module": "object_tracker.opencv_mwe_pylint_err",
"obj": "",
"line": 12,
"column": 21,
"endLine": 12,
"endColumn": 38,
"path": "poc\object_tracker\opencv_mwe_pylint_err.py",
"symbol": "no-member",
"message": "Module 'cv2' has no 'RETR_EXTERNAL' member",
"message-id": "E1101"
},
{
"type": "error",
"module": "object_tracker.opencv_mwe_pylint_err",
"obj": "",
"line": 12,
"column": 40,
"endLine": 12,
"endColumn": 63,
"path": "poc\object_tracker\opencv_mwe_pylint_err.py",
"symbol": "no-member",
"message": "Module 'cv2' has no 'CHAIN_APPROX_SIMPLE' member",
"message-id": "E1101"
},
{
"type": "error",
"module": "object_tracker.opencv_mwe_pylint_err",
"obj": "",
"line": 15,
"column": 0,
"endLine": 15,
"endColumn": 21,
"path": "poc\object_tracker\opencv_mwe_pylint_err.py",
"symbol": "no-member",
"message": "Module 'cv2' has no 'destroyAllWindows' member",
"message-id": "E1101"
}
]

Expected behavior

PyLint should recognize all members in the cv2 module.

Pylint version

pylint 3.2.7
astroid 3.2.4
Python 3.12.7

OS / Environment

Windows 11
Ubuntu 24.04
Raspberry Pi OS with desktop
Release date: July 4th 2024
System: 32-bit
Kernel version: 6.6
Debian version: 12 (bookworm)

Additional dependencies

opencv-python==4.10.0.84

[LambdaScorpii]

Edit

Tested it without being an extension, by directly installing the latest version. Seems to cause the same issue, though:

pylint --version

pylint 3.3.1
astroid 3.3.5
Python 3.12.7 (tags/v3.12.7:0b05ead, Oct 1 2024, 03:06:41) [MSC v.1941 64 bit (AMD64)]

pylint opencv_mwe_pylint_err.py

************* Module object_tracker.opencv_mwe_pylint_err
opencv_mwe_pylint_err.py:5:6: E1101: Module 'cv2' has no 'VideoCapture' member (no-member)
opencv_mwe_pylint_err.py:6:25: E1101: Module 'cv2' has no 'createBackgroundSubtractorMOG2' member (no-member)
opencv_mwe_pylint_err.py:10:22: E1101: Module 'cv2' has no 'findContours' member (no-member)
opencv_mwe_pylint_err.py:11:21: E1101: Module 'cv2' has no 'RETR_EXTERNAL' member (no-member)
opencv_mwe_pylint_err.py:11:40: E1101: Module 'cv2' has no 'CHAIN_APPROX_SIMPLE' member (no-member)
opencv_mwe_pylint_err.py:14:0: E1101: Module 'cv2' has no 'destroyAllWindows' member (no-member)

---

Your code has been rated at 0.00/10 (previous run: 0.00/10, +0.00)

"""Minimum Working Example showing the issue that PyLint does not recognize cv2 Members"""

import cv2

cap = cv2.VideoCapture("test.mp4")
background_substractor = cv2.createBackgroundSubtractorMOG2()

ret, frame = cap.read()
foreground_mask = background_substractor.apply(frame)
contours, hierarchy = cv2.findContours(
    foreground_mask, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE
)

cv2.destroyAllWindows()
cap.release()