lhefile.LHEFileBase Class Reference

Inheritance diagram for lhefile.LHEFileBase:

Collaboration diagram for lhefile.LHEFileBase:

Public Member Functions
def	__init__ (self, filename, *melaargs, **kwargs)
def	__enter__ (self, *args, **kwargs)
def	__exit__ (self, *args, **kwargs)
def	__iter__ (self)
def	__getattr__ (self, attr)
def	__setattr__ (self, attr, value)

Public Attributes
	isgen
	filename
	mela
	f
	daughters
	associated
	mothers
	weight
	weights

Private Member Functions
def	_setInputEvent (self, event)
def	_LHEclassattributes (cls)

Static Private Attributes
	__metaclass__ = abc.ABCMeta
dictionary	__melas = {}

Detailed Description

Simple class to iterate through an LHE file and calculate probabilities for each event
Example usage:
h1 = ROOT.TH1F("costheta1", "costheta1", 100, -1, 1)
h2 = ROOT.TH1F("D_0minus", "D_0minus", 100, 0, 1)
with LHEFile("filename.lhe") as f:
  for event in f:  #event becomes the mela object
    h1.Fill(event.computeDecayAngles().costheta1)
    event.ghz1 = 1
    p0plus = event.computeP()
    event.ghz4 = 1
    p0minus = event.computeP()
    h2.Fill(p0plus / (p0plus + p0minus))

Definition at line 142 of file lhefile.py.

Constructor & Destructor Documentation

__init__()

def lhefile.LHEFileBase.__init__	(		self,
			filename,
		*	melaargs,
		**	kwargs
	)

Definition at line 161 of file lhefile.py.

  def __init__(self, filename, *melaargs, **kwargs):
    self.isgen = kwargs.pop("isgen", True)
    reusemela = kwargs.pop("reusemela", False)
    gzip = kwargs.pop("gzip", False)
    if kwargs: raise ValueError("Unknown kwargs: " + ", ".join(kwargs))
    self.filename = filename
    if reusemela and melaargs in self.__melas:
      self.mela = self.__melas[melaargs]
    else:
      self.__melas[melaargs] = self.mela = Mela(*melaargs)
 
    openfunction = open
    if gzip: from gzip import GzipFile as openfunction
    self.f = openfunction(self.filename)

Member Function Documentation

__enter__()

def lhefile.LHEFileBase.__enter__	(		self,
		*	args,
		**	kwargs
	)

Definition at line 175 of file lhefile.py.

  def __enter__(self, *args, **kwargs):
    self.f.__enter__(*args, **kwargs)
    return self

__exit__()

def lhefile.LHEFileBase.__exit__	(		self,
		*	args,
		**	kwargs
	)

Definition at line 178 of file lhefile.py.

  def __exit__(self, *args, **kwargs):
    return self.f.__exit__(*args, **kwargs)
 

__getattr__()

def lhefile.LHEFileBase.__getattr__	(		self,
			attr
	)

Definition at line 216 of file lhefile.py.

  def __getattr__(self, attr):
    if attr == "mela": raise RuntimeError("Something is wrong, trying to access mela before it's created")
    return getattr(self.mela, attr)

__iter__()

def lhefile.LHEFileBase.__iter__

(

self

)

Definition at line 181 of file lhefile.py.

  def __iter__(self):
    event = ""
    for linenumber, line in enumerate(self.f, start=1):
      if "<event>" not in line and not event:
        continue
      event += line
      if "</event>" in line:
        try:
          self._setInputEvent(event)
          yield self
          event = ""
        except GeneratorExit:
          raise
        except:
          print("On line", linenumber)
          raise
        finally:
          try:
            self.mela.resetInputEvent()
          except:
            pass
 

__setattr__()

def lhefile.LHEFileBase.__setattr__	(		self,
			attr,
			value
	)

Definition at line 219 of file lhefile.py.

  def __setattr__(self, attr, value):
    if attr in self._LHEclassattributes():
      super(LHEFileBase, self).__setattr__(attr, value)
    else:
      setattr(self.mela, attr, value)
 

_LHEclassattributes()

def lhefile.LHEFileBase._LHEclassattributes (   cls )

private

Definition at line 213 of file lhefile.py.

  def _LHEclassattributes(cls):
    return "filename", "f", "mela", "isgen", "daughters", "mothers", "associated", "weight", "weights"
 

_setInputEvent()

def lhefile.LHEFileBase._setInputEvent (   self,   event  )

private

Definition at line 203 of file lhefile.py.

  def _setInputEvent(self, event):
    lheevent = self.lheeventclass(event, self.isgen)
    self.daughters = lheevent.daughters
    self.associated = lheevent.associated
    self.mothers = lheevent.mothers
    self.weight = lheevent.weight
    self.weights = lheevent.weights
    self.setInputEvent(*lheevent)
 

Member Data Documentation

__melas

dictionary lhefile.LHEFileBase.__melas = {}

staticprivate

Definition at line 159 of file lhefile.py.

__metaclass__

lhefile.LHEFileBase.__metaclass__ = abc.ABCMeta

staticprivate

Definition at line 157 of file lhefile.py.

associated

lhefile.LHEFileBase.associated

Definition at line 206 of file lhefile.py.

daughters

lhefile.LHEFileBase.daughters

Definition at line 205 of file lhefile.py.

f

lhefile.LHEFileBase.f

Definition at line 174 of file lhefile.py.

filename

lhefile.LHEFileBase.filename

Definition at line 166 of file lhefile.py.

isgen

lhefile.LHEFileBase.isgen

Definition at line 162 of file lhefile.py.

mela

lhefile.LHEFileBase.mela

Definition at line 168 of file lhefile.py.

mothers

lhefile.LHEFileBase.mothers

Definition at line 207 of file lhefile.py.

weight

lhefile.LHEFileBase.weight

Definition at line 208 of file lhefile.py.

weights

lhefile.LHEFileBase.weights

Definition at line 209 of file lhefile.py.

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The documentation for this class was generated from the following file:

• MELA/python/lhefile.py