Pyqt5 Error: Could Not Find Or Load Qt Platform Plugin Xcb

Up until Anaconda3 (which contains Python 3.4) was re-installed on my RedHat 6.5 workstation, I have been able to develop Python apps that use PyQT5. Post re-install of Anaconda I

Solution 1:

This is an error caused by having two different versions of Qt under the same installation/environment.

Check the packages installed and their versions in your environment (if for some reason you're not working in a virtual environment, you can skip the first line):

source activate yourenvname 
conda list

If you see pyqt and qt both with version 4.X.X then remove them (assuming you want to work in Qt v5):

conda remove qt
conda remove pyqt

Solution 2:

I had an issue that seems to match what happened here. But in my case the solution was to "sudo rm -rf user/anaconda3" and reinstall it with "bash anaconda....sh", because I had previously installed it using sudo ("sudo bash anaconda....sh")