Fix Matplotlib imshow() blank figures

If you get Matplotlib blank figures or errors like:

backend_gtk3cairo.RendererGTK3Cairo NotImplementedError: Surface.create_for_data: Not Implemented yet.

Fix

Fix Matplotlib no display issues by fixing the Matplotlib QT backend.

  1. install the latest QT

    conda install pyqt

  2. add to your matplotlibrc

    backend : qt5agg
    

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