I am running the interactive example from the documentation using the Qt4Agg backend. That is, I run the following commands in a regular Python shell:

    import matplotlib.pyplot as plt
    plt.ion()
    plt.plot([1.6, 2.7])

When I put backend.qt4 : PyQt4 in my .matplotlibrc it works as expected. However, when I use backend.qt4 : PySide an empty, unresponsive window is shown.

After a bit of googling I am not so sure that the "interactive example" is supposed to work for alli interactive backends. Especially this comment by efiring indicates so. However this is in contradiction with the documentation.

Can you clarify this and/or update the documentation?

I am using OS-X 10.6.8, Python 2.7.10, Matplotlib 1.4.3, PySide 1.2.2 and PyQt 4.11.4.