Public Member Functions
def	__getattr__ (self, name)

def	__getitem__ (self, attr)

def	__init__ (self, tree, entry)

def	eval (self, expr)

Private Attributes
	_entry

	_tree

Detailed Description

Class that allows seeing an entry of a PyROOT TTree as an Event

Definition at line 20 of file datamodel.py.

Constructor & Destructor Documentation

◆ init()

def datamodel.Event.__init__	(	self,
		tree,
		entry
	)

Definition at line 23 of file datamodel.py.

     def __init__(self, tree, entry):
         self._tree = tree
         self._entry = entry
         self._tree.gotoEntry(entry)
 

Member Function Documentation

◆ getattr()

def datamodel.Event.__getattr__	(	self,
		name
	)

Definition at line 28 of file datamodel.py.

References datamodel.Event._tree, and treeReaderArrayTools.readBranch().

Referenced by datamodel.Event.__getitem__(), and datamodel.Object.__getitem__().

     def __getattr__(self, name):
         if name in self.__dict__:
             return self.__dict__[name]
         return self._tree.readBranch(name)
 

◆ getitem()

def datamodel.Event.__getitem__	(	self,
		attr
	)

Definition at line 33 of file datamodel.py.

References PileUpSummaryInfo.PileUpSummaryInfo.__getattr__(), ExternalGeneratorFilter.ExternalGeneratorFilter.__getattr__(), Types._Untracked.__getattr__(), PhysicsObject.PhysicsObject.__getattr__(), datamodel.Event.__getattr__(), eventsfwlite.Events.__getattr__(), XML2Python.DataNode.__getattr__(), Types._ProxyParameter.__getattr__(), chain.Chain.__getattr__(), Types._ProxyParameterFactory.__getattr__(), VarParsing.VarParsing.__getattr__(), Config.FilteredStream.__getattr__(), and Config.ProcessForProcessAccelerator.__getattr__().

     def __getitem__(self, attr):
         return self.__getattr__(attr)
 

◆ eval()

def datamodel.Event.eval	(	self,
		expr
	)

Evaluate an expression, as TTree::Draw would do. 

   This is added for convenience, but it may perform poorly and the implementation is not bulletproof,
   so it's better to rely on reading values, collections or objects directly

Definition at line 36 of file datamodel.py.

References datamodel.Event._entry, and datamodel.Event._tree.

     def eval(self, expr):
         """Evaluate an expression, as TTree::Draw would do. 
 
            This is added for convenience, but it may perform poorly and the implementation is not bulletproof,
            so it's better to rely on reading values, collections or objects directly
         """
         if not hasattr(self._tree, '_exprs'):
             self._tree._exprs = {}
             # remove useless warning about EvalInstance()
             import warnings
             warnings.filterwarnings(action='ignore', category=RuntimeWarning,
                                     message='creating converter for unknown type "const char\*\*"$')
             warnings.filterwarnings(action='ignore', category=RuntimeWarning,
                                     message='creating converter for unknown type "const char\*\[\]"$')
         if expr not in self._tree._exprs:
             formula = ROOT.TTreeFormula(expr, expr, self._tree)
             if formula.IsInteger():
                 formula.go = formula.EvalInstance64
             else:
                 formula.go = formula.EvalInstance
             self._tree._exprs[expr] = formula
             # force sync, to be safe
             self._tree.GetEntry(self._entry)
             self._tree.entry = self._entry
             # self._tree._exprs[expr].SetQuickLoad(False)
         else:
             self._tree.gotoEntry(self._entry)
             formula = self._tree._exprs[expr]
         if "[" in expr:  # unclear why this is needed, but otherwise for some arrays x[i] == 0 for all i > 0
             formula.GetNdata()
         return formula.go()
 
 

Member Data Documentation

◆ _entry

datamodel.Event._entry

private

Definition at line 25 of file datamodel.py.

Referenced by ntupleDataFormat.Event.entry(), and datamodel.Event.eval().

◆ _tree

datamodel.Event._tree

private

Definition at line 24 of file datamodel.py.

Public Member Functions

Private Attributes