Hi all,
I’ve faced a strange problem dealing with pyROOT.
I’m writing an MVA training script using RDataFrame and TMVA in pyROOT. The code snippet is as follows:
# Preprocessing input samples
rdf = ROOT.RDataFrame("tree", "file.root")
rdf = rdf.Define("z", "x + y").Filter("z > 0")
rdf.Snapshot("tree", "out.root")
# TMVA training
ROOT.TMVA.Tools.Instance()
loader = ROOT.TMVA.DataLoader("test") # everything works now
for cur_var in ["x", "y", "z"]:
loader.AddVariable(cur_var) # *** Break *** segmentation violation
# if comment the AddVariable lines, segmentation violation here
f = ROOT.TFile("out.root")
I tried to add breakpoints to AddVarialbe loop, and the Debugger gave the same segmentation violation. But the interesting thing is in Debugger, I can access loader with
loader.GetName() # test
loader.AddCut("test") # no error
loader.Dump()
"""
==> Dumping object at: 0x000000017425b090, name=fold_0, class=TMVA::DataLoader
*fDataSetManager ->60000244fd50 DSMTEST
*fDataInputHandler ->6000076282d0 ->
fDefaultTrfs ->17425b1a8 list of transformations on default DataSet
fOptions option string given by construction (presently only "V")
fOptions.fRep ->17425b1c8 ! String data
fTransformations I List of transformations to test
fTransformations.fRep ->17425b1e0 ! String data
fVerbose false verbose mode
fDataAssignType 2 flags for data assigning
fTrainAssignTree ->17425b1f8 for each class: tmp tree if user wants to assign the events directly
fTestAssignTree ->17425b210 for each class: tmp tree if user wants to assign the events directly
"""
And if without preprocessing input samples in the script (skip RDataFrame part), then the TMVA part works smoothly.
I’m using exactly the same script on another MacOS system (also on lxplus), which works totally fine.
Segmentation violation message
The segmentation violation error message is as follows:
*** Break *** segmentation violation
[/Applications/ROOT_6.26/install/lib/libCore.so] TUnixSystem::DispatchSignals(ESignals) (no debug info)
[/usr/lib/system/libsystem_platform.dylib] _sigtramp (no debug info)
[/Applications/ROOT_6.26/install/lib/libcppyy_backend3_9.so] WrapperCall(long, unsigned long, void*, void*, void*) (no debug info)
[/Applications/ROOT_6.26/install/lib/libcppyy3_9.so] CPyCppyy::(anonymous namespace)::VoidExecutor::Execute(long, void*, CPyCppyy::CallContext*) (no debug info)
[/Applications/ROOT_6.26/install/lib/libcppyy3_9.so] CPyCppyy::CPPMethod::ExecuteFast(void*, long, CPyCppyy::CallContext*) (no debug info)
[/Applications/ROOT_6.26/install/lib/libcppyy3_9.so] CPyCppyy::CPPMethod::ExecuteProtected(void*, long, CPyCppyy::CallContext*) (no debug info)
[/Applications/ROOT_6.26/install/lib/libcppyy3_9.so] CPyCppyy::CPPMethod::Call(CPyCppyy::CPPInstance*&, _object*, _object*, CPyCppyy::CallContext*) (no debug info)
[/Applications/ROOT_6.26/install/lib/libcppyy3_9.so] CPyCppyy::(anonymous namespace)::mp_call(CPyCppyy::CPPOverload*, _object*, _object*) (no debug info)
[/Users/avencast/miniconda3/bin/python3.9] _PyObject_MakeTpCall (no debug info)
[/Users/avencast/miniconda3/bin/python3.9] call_function (no debug info)
[/Users/avencast/miniconda3/bin/python3.9] _PyEval_EvalFrameDefault (no debug info)
[/Users/avencast/miniconda3/bin/python3.9] function_code_fastcall (no debug info)
[/Users/avencast/miniconda3/bin/python3.9] call_function (no debug info)
[/Users/avencast/miniconda3/bin/python3.9] _PyEval_EvalFrameDefault (no debug info)
[/Users/avencast/miniconda3/bin/python3.9] _PyEval_EvalCode (no debug info)
[/Users/avencast/miniconda3/bin/python3.9] _PyFunction_Vectorcall (no debug info)
[/Users/avencast/miniconda3/bin/python3.9] call_function (no debug info)
[/Users/avencast/miniconda3/bin/python3.9] _PyEval_EvalFrameDefault (no debug info)
[/Users/avencast/miniconda3/bin/python3.9] _PyEval_EvalCode (no debug info)
[/Users/avencast/miniconda3/bin/python3.9] pyrun_file (no debug info)
[/Users/avencast/miniconda3/bin/python3.9] pyrun_simple_file (no debug info)
[/Users/avencast/miniconda3/bin/python3.9] PyRun_SimpleFileExFlags (no debug info)
[/Users/avencast/miniconda3/bin/python3.9] pymain_run_file (no debug info)
[/Users/avencast/miniconda3/bin/python3.9] pymain_run_python (no debug info)
[/Users/avencast/miniconda3/bin/python3.9] Py_RunMain (no debug info)
[/Users/avencast/miniconda3/bin/python3.9] pymain_main (no debug info)
[/Users/avencast/miniconda3/bin/python3.9] main (no debug info)
[/usr/lib/dyld] start (no debug info)
Traceback (most recent call last):
File "PycharmProjects/mvatoolkit/mva_toolkit_bin/process.py", line 84, in <module>
process_fold(config=cfg, fold=0)
File "PycharmProjects/mvatoolkit/mva_toolkit_bin/process.py", line 74, in process_fold
train.train(config['hyper_parameters'])
File "PycharmProjects/mvatoolkit/TMVAToolkit/TrainProcessor.py", line 38, in train
loader.AddVariable(cur_var)
TypeError: none of the 2 overloaded methods succeeded. Full details:
void TMVA::DataLoader::AddVariable(const TString& expression, const TString& title, const TString& unit, char type = 'F', double min = 0, double max = 0) =>
TypeError: takes at least 3 arguments (1 given)
void TMVA::DataLoader::AddVariable(const TString& expression, char type = 'F', double min = 0, double max = 0) =>
SegmentationViolation: segfault in C++; program state was reset
Current Setup (not working)
ROOT Version: 6.26/10
Platform: MacOS Ventura with M2 Max
Compiler: Apple clang version 14.0.0 (clang-1400.0.29.202)
Python Version: Python 3.9.11
Previous Setup (works fine)
ROOT Version: 6.26/10
Platform: MacOS Big Sur with intel
Compiler: Apple clang version 12.0.5 (clang-1205.0.22.11)
Python Version: Python 3.9.12
) I would be happy to take a look.