PlotWidget not displaying axes, labels or data after move to 64-bit. Any ideas?

[Tom Bailey]

Hi,

I've needed to move from 32bit to 64bit, and have run into a problem with pyqtgraph plotting.

Even the simplest examples are displaying the same behaviour (SimplePlot.py for instance)

Running SimplePlot.py shows the window, but the window is empty except for a squiggle in the top left, which I  am guessing is the plot.. If I left click inside the window and pan it, the plot shows with a sensible size, though still with no axes or titles.

Right clicking brings up the menu as expected, but any changes are not visible until i close the menu and pan the plot again.

I'm using an anaconda environment (Python 2.7.12) with the following packages installed:

pyqtgraph 0.910

PySide 1.2.4

numpy 1.11.1

scipy 0.18.0

cython 0.24.1

All packages (including pyqtgraph) were installed with pip.

No exceptions or errors are shown when I see these issues.

Has anyone seen this before? 

Thanks for any help!

Tom

[michael...@naturalfiberwelding.com]

I found two ways to replicate the problem. 

I was originally using PySide on Anaconda 4.1. I could fix the problem by switching to QtPy4.

After I updated to Anaconda 4.2.0 I get the problem all the time, when using either PySide or QtPy4. Very annoying.