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)
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