Inheritance diagram for AccessingDataStoreModule:

Public Member Functions
	initialize (self)

	event (self)

Public Attributes
	eventinfo = Belle2.PyStoreObj("EventMetaData")
	an example object from the datastore (the metadata collection for the event)

	particles = Belle2.PyStoreArray("MCParticles")
	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()

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()

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 = Belle2.PyStoreObj("EventMetaData")

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

Definition at line 15 of file 087_module.py.

◆ particles

particles = Belle2.PyStoreArray("MCParticles")

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

Definition at line 17 of file 087_module.py.

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

online_book/basf2/steering_files/087_module.py

Public Member Functions