[Solved] Cv2.imshow Error: window.cpp:1274: error: (-2:Unspecified error) The function is not implemented.

Traceback (most recent call last):
File “/home/data/PJS/test_bed/img_show.py”, line 18, in
cv2.imshow(‘img’, img)
cv2.error: OpenCV(4.5.3) /tmp/pip-req-build-9gwtlx3c/opencv/modules/highgui/src/window.cpp:1274: error: (-2:Unspecified error) The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Cocoa support. If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script in function ‘cvShowImage’
Solution:

$ sudo apt install libgtk2.0-dev pkg-config
$ pip uninstall opencv-python opencv-contrib-python
$ pip install opencv-python


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