qt - cv2.destroyAllWindows() is not implemented when installing opencv-python-headless

Question

This question already has answers here: question from:https://stackoverflow.com/questions/65894955/cv2-destroyallwindows-is-not-implemented-when-installing-opencv-python-headles

Answer 1

The newest version of opencv-python that I had installed was causing the problem with pyqt5. So I uninstalled it and installed the following version:

$ pip install opencv-python==4.3.0.36

Adding the following info in case it might help future readers.

Here's my pyqt version:

$ pip list|grep Qt
PyQt5                  5.15.2
PyQt5-sip              12.8.1


$ python
Python 3.8.5 (default, Jul 28 2020, 12:59:40) 
[GCC 9.3.0] on linux

$ pip --version
pip 21.0 from /home/mona/venv/vision/lib/python3.8/site-packages/pip (python 3.8)

$ lsb_release -a
LSB Version:    core-11.1.0ubuntu2-noarch:security-11.1.0ubuntu2-noarch
Distributor ID: Ubuntu
Description:    Ubuntu 20.04.1 LTS
Release:    20.04
Codename:   focal

Credits: https://stackoverflow.com/a/63350799/2414957