conda install pyqtgraph downgrades pyqt from 5 to 4

[Vince West]

I have noted that doing a simple conda install pyqtgraph seems to be very disruptive to a working environment as anaconda has currently streamlined pyqt to mean all versions, including pyqt4 and pyqt5.  To the experienced user this isn't really a problem, but seems like it should be simple to fix no?  pyqtgraph should be pyqt version agnostic.

[Edward Barnard]

I have had similar issues with the conda-packaged pyqtgraph forcing downgrades of Qt because they are stuck at v0.9.10.

pip install does the trick for me for now. However, the conda package should be updated.

Thus, I have posted an issue on https://github.com/ContinuumIO/anaconda-issues/issues/1330 to have the conda package updated.

Cheers

-Ed