> > On Ubuntu 17.04, which is based on Qt5.7.1, output from > > `./output/bin/qgis` > > >> `Couldn't load PyQt. > > Python support will be disabled. (a really big deal) > > >> Traceback (most recent call last): > > File "", line 1, in > > ImportError: /usr/lib/x86_64-linux-gnu/libQt5Core.so.5: version `Qt_5.8' > > not found (required by > > /usr/local/lib/python3.5/dist-packages/PyQt5/QtCore.so)` > > I have added a new page called 'Starting QGIS3 as seen from lddtree.sh'
https://github.com/qgis/QGIS-Documentation/wiki/QGIS3-lddtree-sh As is often the case, complex Applications often fail for many different reasons. This page show what steps where undertaken to resolve these problems. lddtree.sh is a forked version of the original lddtree that, for me, brings better result. (source and download link are supplied on that page). Here, in this case, it is important to check if both QGIS3 and PyQt5/QtCore.so use the same libQt5Core.so.5 - I believe it is save to assume that both MUST use the same QT5 Version, since QtCore.so is a (I believe) a function interface between python3 and libQt5Core The page shows the result of both QGIS3 and PyQt5/QtCore.so (both of which work correctly) as an comparison. In this case, I think, the cause of the problem is more likly to be that: -> /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 --> does not exsit on your system Mark
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