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Pylint no-member warnings in 4.5.4.58 #570

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robertschweizer opened this issue Oct 21, 2021 · 6 comments · Fixed by #579
Closed
4 tasks done

Pylint no-member warnings in 4.5.4.58 #570

robertschweizer opened this issue Oct 21, 2021 · 6 comments · Fixed by #579
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@asenyaev

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@robertschweizer
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robertschweizer commented Oct 21, 2021 •
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Expected behaviour

Pylint was previously able to inspect cv2 member existence with the extension-pkg-whitelist parameter.

Actual behaviour

For opencv-python-4.5.4.58, pylint can no longer inspect the members.

Steps to reproduce

On Windows 10, Python 3.8 64bit, using Pylint 2.11.1:

"""Test module test.py"""
from cv2 import getStructuringElement, MORPH_ELLIPSE

a = getStructuringElement(MORPH_ELLIPSE, (3, 3))

With opencv-python-4.5.3.56:

$ pylint test.py --extension-pkg-whitelist=cv2

-------------------------------------------------------------------
Your code has been rated at 10.00/10 (previous run: 5.00/10, +5.00)

With opencv-python-4.5.4.58:

$ pylint test.py --extension-pkg-whitelist=cv2
************* Module test
test.py:2:0: E0611: No name 'getStructuringElement' in module 'cv2' (no-name-in-module)
test.py:2:0: E0611: No name 'MORPH_ELLIPSE' in module 'cv2' (no-name-in-module)

----------------------------------------------------------------------
Your code has been rated at -40.00/10 (previous run: 10.00/10, -50.00)
Issue submission checklist
  • This is not a generic OpenCV usage question (looking for help for coding, other usage questions, homework etc.)
  • I have read the README of this repository and understand that this repository provides only an automated build toolchain for OpenCV Python packages (there is no actual OpenCV code here)
  • The issue is related to the build scripts in this repository, to the pre-built binaries or is a feature request (such as "please enable this additional dependency")
  • I'm using the latest version of opencv-python
@alalek
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alalek commented Oct 21, 2021

BTW, does it work with --unsafe-load-any-extension=y: https://pylint.pycqa.org/en/latest/technical_reference/c_extensions.html

@robertschweizer
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Good idea, maybe the C extension name just changed. But no, with --unsafe-load-any-extension=y it also does not work.

@jaime-dangelmeier
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I also tried using the generated-members = cv2.* flag for pylint => still the same issue.

@asenyaev asenyaev self-assigned this Nov 3, 2021
@asenyaev asenyaev mentioned this issue Nov 3, 2021
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@asmorkalov asmorkalov mentioned this issue Nov 8, 2021
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@asenyaev asenyaev reopened this Nov 17, 2021
@asmorkalov
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Since 4.5.4.60 pylint works with OpenCV python loader correctly. Command line example:

python3 -m pylint --extension-pkg-whitelist=cv2,numpy ./contours.py

@asenyaev asenyaev mentioned this issue Dec 6, 2021
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@robertschweizer
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The fix for this was reverted in 5633cf3, so this bug appears again in version 4.6.0.66. Should we rename and reopen this issue or create a new one?

@thompson318 thompson318 mentioned this issue Jul 5, 2022
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@pasbi
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pasbi commented Aug 10, 2022 •
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I get the Module 'cv2' has no '*' member-pylint-error with

  • ❌ python3-opencv (4.6.0 installed with apt)
  • ❌ opencv-python (4.6.0 installed with pip)
  • ❌ self-built OpenCV (using GitHub repos opencv/opencv and opencv/opencv_contrib but not using opencv-python).
  • ✔️ The only way I found to make pylint work was to install version 4.5.5 of opencv-python with pip.

However, I'm required to build OpenCV from source for technical reasons.
What's the charm that lets the 4.5.5 pip wheel work with pylint and how can I apply it to my self-built OpenCV?

Build and test environment is a debian bookworm Docker container.

@robertschweizer robertschweizer mentioned this issue Mar 30, 2023
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@adamtheturtle adamtheturtle mentioned this issue Dec 28, 2023
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Added lines for a proper work using pylint and an autocomplete in IDE
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@asmorkalov @pasbi @alalek @jaime-dangelmeier @robertschweizer @asenyaev