basf2_mva.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
 
 
 
import sys
 
 
from ROOT import PyConfig
PyConfig.IgnoreCommandLineOptions = True  # noqa
 
# FEI uses multi-threading for parallel execution of tasks therefore
# the ROOT gui-thread is disabled, which otherwise interferes sometimes
PyConfig.StartGuiThread = False  # noqa
 
# First load the required shared library
from ROOT import gSystem
from ROOT import Belle2
gSystem.Load('libmva.so')
gSystem.Load('libframework.so')
gSystem.Load('libanalysis.so')
 
# For some strange reason we need to do this to makeROOTCompatible be available.
Belle2.Variable.Manager
Belle2.Variable.Manager.Instance()
import ROOT  # noqa
 
 
class ForwardBelle2MVANamespace(object):
    """ Class which forwards lookups to the Belle2.MVA namespace,
        this makes the access to C++ functions/classes of the mva package more convenient """
 
    def __getattr__(self, name):
        """ Return attribute with the given name in the Belle2.MVA namespace """
        return getattr(Belle2.MVA, name)
 
    def vector(self, *args):
        """ Create an std::vector containing the passed args """
        v = ROOT.std.vector(type(args[0]))()
        for x in args:
            v.push_back(x)
        return v
 
 
Belle2.MVA.AbstractInterface.initSupportedInterfaces()
ROOT.gROOT.SetBatch(True)
 
 
# This is a hack (recommended by Guido) to replace this module
# with an object of the ForwardBelle2MVANamespace class
# Hence we are effectively able to implement getattr for a module.
sys.modules[__name__] = ForwardBelle2MVANamespace()