PyQT5 错误:无法找到或加载 Qt 平台插件 xcb [英] PyQT5 error: could not find or load Qt platform plugin xcb

问题描述

直到 Anaconda3(包含 Python 3.4)重新安装在我的 RedHat 6.5 工作站上，我已经能够开发 Python使用 PyQT5 的应用.

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.

重新安装 Anaconda 我收到一条错误消息:

Post re-install of Anaconda I receive an error message:

....无法找到或加载 Qt 平台插件 xcb

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

Anaconda 安装的唯一区别是文件夹名称:/usr/local/anaconda3 vs /usr/local/anaconda_py3

The only difference between Anaconda installs is the folder name: /usr/local/ananaconda3 vs /usr/local/anaconda_py3

我检查了 libqxcb.so 没有丢失的依赖项.我重建了 PyQT5.我尝试显式添加 PyQT5 的 site-packages 的位置:

I checked libqxcb.so has no missing dependencies. I rebuilt PyQT5. I tried explicitly adding location of site-packages of PyQT5:

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

还有其他建议吗?

重新安装Python对PyQT5的使用有何影响?

How does re-installing Python impact the use of PyQT5?

推荐答案

这是由于同一安装/环境下有两个不同版本的Qt导致的错误.

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

检查您的环境中安装的软件包及其版本(如果由于某种原因您不在虚拟环境中工作，您可以跳过第一行):

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

如果您看到 pyqt 和 qt 都具有版本 4.XX 则删除它们(假设您想在 Qt v5 中工作):

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

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