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PyQT5 error: Could not find or load Qt platform plugin xcb

Until Anaconda3

(which contains Python 3.4

) was reinstalled on my workstation RedHat 6.5

, I was able to develop Python applications that use PyQT5

.

After reinstalling Anaconda

, an error message appears:

.... could not find or load the Qt platform plugin xcb

The only difference between Anaconda installations is the folder name: /usr/local/ananaconda3

vs/usr/local/anaconda_py3

I have checked libqxcb.so

does not have any missing dependencies. I have restored PyQT5

. I tried to explicitly add the location site-packages

to PyQT5

:

import site
site.addsitedir("...path.../python3.4")

Any other suggestions?

How does reinstalling Python

affect usage PyQT5

?

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2 answers


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

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

source activate yourenvname 
conda list


If you see pyqt

and qt

how with the version 4.X.X

then remove them (if you want to work in Qt v5):

conda remove qt
conda remove pyqt
+7


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



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