AccessingDataStoreModule Class Reference

Inheritance diagram for AccessingDataStoreModule:

Public Member Functions
def	initialize (self)
def	event (self)

Public Attributes
	eventinfo
	an example object from the datastore (the metadata collection for the event)
	particles
	an example array from the datastore (the list of MC particles)

Detailed Description

An example of a basf2 module in python which accesses things in the datastore.

Definition at line 7 of file 087_module.py.

Member Function Documentation

event()

def event

(

self

)

Print the number of charged particles and the total charge

Definition at line 19 of file 087_module.py.

    def event(self):
        """Print the number of charged particles and the total charge"""
        n_charged = 0
        total_charge = 0
        for particle in self.particles:
            charge = particle.getCharge()
            if charge:
                n_charged += 1
            total_charge += charge
 
        b2.B2INFO(
            f"Number of charged particles = {n_charged}, "
            f"total charge of event = {total_charge}"
        )
 
 
# create a path

initialize()

def initialize

(

self

)

Create a member to access event info and the MCParticles
StoreArray

Definition at line 10 of file 087_module.py.

    def initialize(self):
        """Create a member to access event info and the MCParticles
        StoreArray
        """
        
        self.eventinfo = Belle2.PyStoreObj("EventMetaData")
        
        self.particles = Belle2.PyStoreArray("MCParticles")
 

Member Data Documentation

eventinfo

eventinfo

an example object from the datastore (the metadata collection for the event)

Definition at line 15 of file 087_module.py.

particles

particles

an example array from the datastore (the list of MC particles)

Definition at line 17 of file 087_module.py.

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

• online_book/basf2/steering_files/087_module.py