[Ipe-discuss] Problem with matplotlib backend

Otfried Cheong otfried at ipe.airpost.net
Sat Dec 27 22:18:46 CET 2014

On 12/27/2014 9:55 PM, Fabien Lafont wrote:
> The resulting error when I want to export the ipe file is:
> C:\Python27\lib\site-packages\matplotlib\__init__.py:1155: UserWarning:
>   This call to matplotlib.use() has no effect
> because the backend has already been chosen;
> matplotlib.use() must be called *before* pylab, matplotlib.pyplot,
> or matplotlib.backends is imported for the first time.

The error message seems pretty clear - you need to choose the backend 
earlier in your script.


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