PyQt5 - Error import QtWidgets QtGui

Question

I'm running Ubuntu 13.10 (python-3.3.2+) . I've installed Qt5.2.1 (linux installer) , SIP 4.15.5 & PyQt5 both from source of the official site.

PyQt5 build :

The Qt qmake is located here

jeby6372@mercure:~$ ls /opt/Qt/5.2.1/gcc_64/bin
assistant             qdbus           qml1plugindump    qmlviewer
designer              qdbuscpp2xml    qml2puppet        qtpaths
lconvert              qdbusviewer     qmlbundle         rcc
linguist              qdbusxml2cpp    qmlimportscanner  syncqt.pl
lrelease              qdoc            qmlmin            uic
lupdate               qhelpconverter  qmlplugindump     xmlpatterns
moc                   qhelpgenerator  qmlprofiler       xmlpatternsvalidator
pixeltool             qmake           qmlscene
qcollectiongenerator  qml             qmltestrunner

My python path

jeby6372@mercure:~$ echo $PYTHONPATH
:/usr/lib/python3.3/site-packages

Qt5 libraries (shorten list for display purpose):

jeby6372@mercure:/opt/Qt/5.2.1/gcc_64/lib$ ls
cmake                              libQt5Positioning.so.5
libicudata.so.51                   libQt5Positioning.so.5.2
libicudata.so.51.1                 libQt5Positioning.so.5.2.1
libqgsttools_p.so                  libQt5PrintSupport.so.5.2.1
libqgsttools_p.so.1                libQt5QmlDevTools.a
libQt5CLucene.so.5.2               libQt5QuickParticles.so.5.2.1
libQt5Concurrent.so.5.2            libQt5QuickTest.la
libQt5Concurrent.so.5.2.1          libQt5QuickTest.prl
libQt5Core.so.5.2.1                libQt5Script.prl
libQt5DBus.la                      libQt5Script.so
....... 
libQt5Multimedia.so                libQt5WebKit.prl
libQt5Nfc.la                       libQt5Widgets.so.5.2.1
libQt5Nfc.prl                      libQt5X11Extras.la
libQt5Nfc.so                       libQt5X11Extras.prl
libQt5Nfc.so.5                     libQt5X11Extras.so
libQt5Nfc.so.5.2                   libQt5X11Extras.so.5
libQt5OpenGLExtensions.a           libQt5X11Extras.so.5.2.1
libQt5OpenGLExtensions.la          libQt5Xml.la
libQt5OpenGL.so                    libQt5XmlPatterns.so.5
libQt5OpenGL.so.5                  libQt5XmlPatterns.so.5.2
libQt5OpenGL.so.5.2.1              libQt5Xml.prl
libQt5Platfor
libQt5PlatformSupport.prl          libQt5Xml.so.5.2
libQt5Positioning.so

I ran the following commands in the source directory extracted from the official PyQt-gpl-5.2.1.tar.gz tarball :

python3 configure.py --qmake /opt/Qt/5.2.1/gcc_64/bin/qmake # My PyQt5 location
sudo make
sudo make install

Issue:

I can only import a restricted set of modules

>>> from PyQt5.QtCore import *
>>> from PyQt5.QtNetwork import *
>>> from PyQt5.QtXmlPatterns import *
>>> from PyQt5.Qt import *
>>> from PyQt5.QtGui import *
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named 'PyQt5.QtGui'
>>> from PyQt5.QtWidgets import *
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named 'PyQt5.QtWidgets'

I can import QtCore, QtNetwork ... as listed in /usr/local/python3.3/sites-packages/PyQt5 :

jeby6372@mercure:/usr/lib/python3.3/site-packages/PyQt5$ ls
__init__.py  QtCore.so  QtDBus.so  QtNetwork.so  Qt.so  QtXmlPatterns.so  uic

But I can't import QtWidgets, QtGui .. and so on.

It seems that the PyQt5 libraries are not all copied here.

The same problem is described in this post ... but unfortunately with no response from the RiverBanck's team :

Any idea?

Answer 1

Missing package

Install the missing libgl1-mesa-dev dependency as suggested by mata. It's a free implementation of the OpenGL API.

Build

sudo apt-get install libgl1-mesa-dev

Create or clean up your PyQt5 compilation environment and build it according to the regular procedure.

Alternative

If this fix doesn't solve your problem, install the libgl1-mesa-glx package (GLX runtime) and the libgl1-mesa-dri (drawing accelerator) if they are also missing and proceed with Build instructions.

Hope this help.