python.truth Namespace Reference

Classes
class	_Truthtmp

Functions
	do_decay (t, n)
	dump_one_truth (t, f=sys.stdout)
	dump_truth (f=sys.stdout, sgkey="SpclMC", maxn=None)

Detailed Description

Dump out MC truth information.

This module contains the function dump_truth which will dump out the
truth information for the current event in a tabular format.

Function Documentation

do_decay()

python.truth.do_decay	(		t,
			n )

Return the unique ID number for decay N of truth particle T
as a string.  Return an empty string if there's no such decay.

Definition at line 20 of file truth.py.

def do_decay (t, n):
    """Return the unique ID number for decay N of truth particle T
as a string.  Return an empty string if there's no such decay.
"""
    if t.nDecay() <= n:
        return ''
    bc = t.child(n).genParticle().id()
    return str(bc)
 

dump_one_truth()

python.truth.dump_one_truth	(		t,
			f = sys.stdout )

Dump truth information for truth particle T to file F.

Definition at line 31 of file truth.py.

def dump_one_truth (t, f=sys.stdout):
    """Dump truth information for truth particle T to file F."""
    d = _Truthtmp()
    d.bc = t.genParticle().id()
    d.name = PDG.pdgid_to_name(t.pdgId())
    d.da1 = do_decay(t, 0)
    d.da2 = do_decay(t, 1)
    d.da3 = do_decay(t, 2)
    d.pt = t.pt()/1000
    d.eta = t.eta()
    d.phi = t.phi()
    d.m = t.m()/1000
    d.px = t.px()/1000
    d.py = t.py()/1000
    d.pz = t.pz()/1000
    d.e = t.e()/1000
    print ("%(id)3d %(name)-4s %(da1)4s %(da2)4s %(da3)4s %(pt)6.1f %(eta)5.2f %(phi)5.2f %(m)5.1f %(px)6.1f %(py)6.1f %(pz)6.1f %(e)6.1f" % d.__dict__, file=f)
    if t.nDecay() > 3:
        print ("  (more than 3 decays)", file=f)
 
 

dump_truth()

python.truth.dump_truth	(		f = sys.stdout,
			sgkey = "SpclMC",
			maxn = None )

Dump out truth information for the current event.
F is the file to which the dump is sent.
SGKEY is the StoreGate key which is used to retrieve the truth information.

The first column in the dump is the particle unique ID number.
This is followed by the particle type, and then by the unique ID numbers
of any decay daughters (up to 3).  This is followed by the four-momentum
in two versions: first as pt, eta, phi, m and then as px, py, pz, e.

Definition at line 52 of file truth.py.

def dump_truth(f=sys.stdout, sgkey="SpclMC", maxn=None):
    """Dump out truth information for the current event.
F is the file to which the dump is sent.
SGKEY is the StoreGate key which is used to retrieve the truth information.
 
The first column in the dump is the particle unique ID number.
This is followed by the particle type, and then by the unique ID numbers
of any decay daughters (up to 3).  This is followed by the four-momentum
in two versions: first as pt, eta, phi, m and then as px, py, pz, e.
"""
    parts = [p for p in PyParticleTools.getTruthParticles (sgkey)]
    if maxn is not None:
        parts = parts[:maxn]
    for t in parts:
        dump_one_truth (t, f)
    return