Thanks for the help, Wim. This gets me tantalizingly close! What I have so far: import ROOT h = ROOT.TH1F("h","test",100,-2,2) h.FillRandom("gaus",1000) h.Fit("gaus") ROOT.gROOT.ProcessLine("TVirtualFitter *fitter = TVirtualFitter::GetFitter()") fitter = ROOT.gROOT.GetGlobal( "fitter", 1 ) fitter # output is <__main__.TVirtualFitter instance at 0x41ead50c> # looks good so far! fitter.IsA() # output is <__main__.TClass instance at 0x41ead5ec> # that also works fitter.GetParameter(1) # try something simple first *** Break *** segmentation violation Generating stack trace... 0xffffe420 in <unknown function> 0x40c0c9b3 in G__CallFunc::ExecDouble(void*) + 0x77 from /usr/local/root/lib/libCint.so 0x403e1edb in PyROOT::MethodHolder::execute(void*, double&) + 0x61 from /usr/local/root/lib/libPyROOT.so 0x403e2055 in PyROOT::MethodHolder::operator()(_object*, _object*) + 0x10d from /usr/local/root/lib/libPyROOT.so 0x403df590 in PyROOT::MethodDispatcher::operator()(_object*, _object*) + 0xe4 from /usr/local/root/lib/libPyROOT.so 0x403df37b in PyROOT::MethodDispatcher::invoke(_object*, _object*, _object*) + 0x35 from /usr/local/root/lib/libPyROOT.so 0x40066be3 in PyCFunction_Call + 0x5f from /usr/lib/libpython2.3.so.1.0 Aborted Ack! I didn't see that coming! I get this on every method call of fitter, except IsA and other trivial inherited methods like GetName, etc. Any more clues? - Topher WLavrijsen@lbl.gov wrote: >Topher, > >some of the things you are trying to do are best interpreted by me as new >feature requests. :) That's for later. > >For now, one hopefully helpful hint: the list of globals is not synchronized >under PyROOT (I haven't looked into the why of that), whereas under CINT, it >is synchronized. > >Get your global with the second parameter set to 1 (ie. load = true) to force >synchronization. Note, though that gMinuit doesn't exist by default. Ie, do >something like: > > >>> import ROOT > >>> minuit = ROOT.TMinuit() > >>> not not ROOT.gROOT.GetGlobal( "gMinuit", 1 ) > 1 > >(the TMinuit ctor sets gMinuit to 'this'). > >More later ... > >HTH, > Wim > >
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