Canvas freezes on matplotlib import

Hi,

AFAIK, a lot of folks are happily mixing mathplotlib and PyROOT. PyROOT can use either a separate progress thread or the input hook. See whether it makes a difference:import ROOT ROOT.PyConfig.StartGuiThread = 'inputhook'for input hook, or:import ROOT ROOT.PyConfig.StartGuiThread = Truefor progress thread.

Cheers,
Wim