matplotlib | QObject::moveToThread: Current thread (0x831f000) is not the object's thread (0x95b40e0). Cannot move to target thread (0x831f000)

Question

There were existing posts regarding this error, but not in conjunction with using matplotlib.

QObject::moveToThread: Current thread (0x831f000) is not the object's thread (0x95b40e0).
Cannot move to target thread (0x831f000)

qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "/home/me/miniconda3/envs/venv/lib/python3.9/site-packages/cv2/qt/plugins" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: xcb, eglfs, minimal, minimalegl, offscreen, vnc, webgl.

Aborted (core dumped)

Answer 1

Setting the environment variable QT_PLUGIN_PATH, in terminal, may resolve the error:

export QT_PLUGIN_PATH=/home/me/miniconda3/envs/venv/lib/python3.9/site-packages/cv2/qt/plugins

If not, install the dependencies:

sudo apt-get install libxcb1

pip install pyqt5