I've seen this issue on PySide as well reverting to PqQt resolved that 
aspect also image axis rotation is different between PyQt and PySide 

On Wednesday, October 19, 2016 at 8:13:30 PM UTC+1, 
[email protected] wrote:
>
> 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.
>
> On Thursday, September 15, 2016 at 9:00:09 AM UTC-5, Tom Bailey wrote:
>>
>>
>> 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
>>
>

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