| # Gaudi Framework, version v23r0 |

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# GaudiPython::GaudiAlgs::TupleAlgo Class Reference

The base class for easy manupulations with N-Tuples. More...

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List of all members.

## Detailed Description

The base class for easy manupulations with N-Tuples.

    *******************************************************************************
    *                                                * 'Physisics do not like it, *
    *                                                *  physisics do not need it, *
    *                                                *  physisics do not use  it' *
    *                                                * ****************************
    *  Usage:                                                                     *
    *                                                                             *
    *  from GaudiPython.GaudiAlgs import TupleAlgo, SUCCESS                       *
    *                                                                             *
    *  class MyClass(TupleAlgo) :                                                 *
    *       ' My specific Algorithm, derived from TupleAlgo base class '          *
    *       def __init__( self , name , **args ) :                                *
    *            'Constructor from algorithm instance name & parameters'          *
    *             #invoke the constructor of base class                           *
    *             TupleAlgo.__init__(self , name , **args )                       *
    *                                                                             *
    *       def execute ( self ) :                                                *
    *            'Major method (from IAlgorithm interface)'                       *
    *                                                                             *
    *           # get some data from Transient Event Store                        *
    *           tracks = self.get('/Event/Rec/Tracks')                            *
    *                                                                             *
    *           tup = self.nTuple('My N-Tuple')                                   *
    *                                                                             *
    *           for track in tracks :                                             *
    *                                                                             *
    *                 pt   = track.pt   ()                                        *
    *                 p    = track.p    ()                                        *
    *                 chi2 = track.chi2 ()                                        *
    *                                                                             *
    *                 #fill N-tuple:                                              *
    *                 tup.column ( 'pt'   ,  pt   )                               *
    *                 tup.column ( 'p'    ,  p    )                               *
    *                 tup.column ( 'chi2' ,  chi2 )                               *
    *                 #commit the row                                             *
    *                 tup.write  ()                                               *
    *                                                                             *
    *           return SUCCESS                                                    *
    *                                                                             *
    *******************************************************************************

Usage:

      from GaudiPython.GaudiAlgs import TupleAlgo, SUCCESS

      class MyClass(TupleAlgo) :
           ' My specific Algorithm, derived from TupleAlgo base class '
           def __init__( self , name , **args ) :
                'Constructor from algorithm instance name& parameters'
                 #invoke the constructor of base class
                 TupleAlgo.__init__(self , name , **args )

           def execute ( self ) :
                'Major method (from IAlgorithm interface)'

               # get some data from Transient Event Store
               tracks = self.get('/Event/Rec/Tracks')

               tup = self.nTuple('My N-Tuple')

               for track in tracks :

                     pt   = track.pt   ()
                     p    = track.p    ()
                     chi2 = track.chi2 ()

                     #fill N-tuple:
                     tup.column ( 'pt'   ,  pt   )
                     tup.column ( 'p'    ,  p    )
                     tup.column ( 'chi2' ,  chi2 )
                     #commit the row
                     tup.write  ()

               return SUCCESS

See also:
  GaudiTupleAlg

Author:
  Vanya BELYAEV ibelyaev@physics.syr.edu

Date:
  2006-11-26

Definition at line 770 of file GaudiAlgs.py.

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

- /afs/cern.ch/sw/Gaudi/releases/GAUDI/GAUDI_v23r0/GaudiPython/python/GaudiPython/GaudiAlgs.py

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