I believe this has already been fixed, but not released. Have you tried the
latest from github?

On Tue, May 1, 2018 at 10:12 PM, Ankit Kakkar <[email protected]>
wrote:

> Similar post: https://groups.google.com/d/topic/pyqtgraph/
> eb3JUdnWTZQ/discussion
>
> However, changing the library modules is not an option for everyone. Is
> there any other way?
>
>
> On Wednesday, May 2, 2018 at 10:39:15 AM UTC+5:30, Ankit Kakkar wrote:
>>
>> Hi,
>>
>> I am working with PlotWidgets for my project. I need to be able to copy
>> and paste charts. For this I make use of the export functionality. I was
>> able to copy-paste charts previously but now it shows the following error
>> (when I click on copy):
>>
>> Traceback (most recent call last):
>>
>>
>>   File "C:\ProgramData\Anaconda2\lib\site-packages\pyqtgraph\Graphi
>> csScene\exportDialog.py", line 136, in copyClicked
>>     self.currentExporter.export(copy=True)
>>
>>
>>   File "C:\ProgramData\Anaconda2\lib\site-packages\pyqtgraph\export
>> ers\ImageExporter.py", line 70, in export
>>     bg = np.empty((self.params['width'], self.params['height'], 4), dtype
>> =np.ubyte)
>>
>>
>> TypeError: 'float' object cannot be interpreted as an index
>>
>>
>>
>> Not sure why this error is coming even if the width and height params are
>> int.
>>
>> Does anyone know what is the reason for it? Shared the Sample code below:
>>
>>
>> w2 = pg.PlotWidget()
>> w2.addLegend()
>> axis2 = daxis.DateAxisItem(orientation = 'bottom')
>> axis2.attachToPlotItem(w2.getPlotItem())
>> idx2 = abc.index[lookback2+1:]
>> df2 = pd.DataFrame.from_dict(idx2)
>> timestamps2 = list(pd.to_timedelta(df2[0]).dt.total_seconds().astype(int
>> ))
>> w2.plot(x = timestamps2, y = list(100*abc.iloc[lookback2+1:]), name =
>> "ABC", pen = 'b')
>> w2.plot(x = timestamps2, y = list(100*def.iloc[lookback2+1:]), name =
>> "DEF", pen = 'r')
>> w2.plot(x = timestamps2, y = list(ijk.iloc[lookback2+1:,0]), pen = 'r')
>> w2.setLabel('left', 'ABC', units='%')
>> w2.setLabel('right', 'DEF', units='%')
>> self.ui.verticalLayout2.addWidget(w2)
>>
>>
>>
>>
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