Python open_mode Examples

Example #1

 def __init__(self, filename, mode, writeback=False, args=()):
     """ Create Root-only database 
     >>> db = RooOnlyShelf('mydb.root','c')
     >>> h1 = ...
     """
     self.__filename = filename
     from ostap.io.root_file import ROOTCWD, open_mode
     with ROOTCWD():  ## NB: preserve current directory in ROOT!
         rfile = ROOT.TFile.Open(filename, open_mode(mode), *args)
         shelve.Shelf.__init__(self, rfile, writeback)

Example #2

File: rootshelve.py Project: OstapHEP/ostap

 def __init__( self                  ,
               filename              ,
               mode                  ,
               writeback   = False   ,
               args        = ()      ) :
     """ Create Root-only database 
     >>> db = RooOnlyShelf('mydb.root','c')
     >>> h1 = ...
     """
     self.__filename = filename 
     from ostap.io.root_file import ROOTCWD, open_mode  
     with ROOTCWD() : ## NB: preserve current directory in ROOT!
         rfile = ROOT.TFile.Open ( filename   , open_mode ( mode ) , *args )
         if not rfile or not rfile.IsOpen() :
             raise IOError("Can't open ``%s'' with mode ``%s''" % ( filename , mode ) )
         shelve.Shelf.__init__ ( self , rfile , writeback )
         
     self.nominal_dbname = filename