Yes, that is an issue with the 0.10 release. It's fixed if you get the 
latest version from the git repository.

On Thursday, 13 September 2018 03:11:46 UTC+9:30, Lior Weintraub wrote:
>
> Hi,
>
> I am using python 3.6 on Windows and running pyqtgraph version 0.10.0.
> When using image exporter according this 
> <http://www.pyqtgraph.org/documentation/exporting.html> example I got 
> exception on ImageExplorer.py line 70:
>
>         bg = np.empty((self.params['width'], self.params['height'], 4), 
> dtype=np.ubyte)
>
> Note that only the concept was copied from the example and was applied on 
> my plot which had different distentions.
> The exception was caused because height was a float number.
> I saw in code that aspect ratio is kept so I change the width dimension so 
> the height would be an integer.
> Even then, the height was set to float.
> In my example the width was 3000 and the height was calculated as 1750.0
> Finally, when nothing worked I patched the code and changed line 70 to:
>
>         bg = np.empty((int(self.params['width']), int(
> self.params['height']), 4), dtype=np.ubyte)
>
> If you think this needs to be fixed in a differently, please share your 
> thoughts.
>
> Best regards,
> Lior.
>   
>
>

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