def ReadOnly(treefilename, blockfilename):
    return BplusTreeBytes.ReadOnly(treefilename,
                                   blockfilename,
                                   initFunction=xBplusTreeBytes)
def ReOpen(treefilename, blockfilename, access="r+b"):
    return BplusTreeBytes.ReOpen(treefilename,
                                 blockfilename,
                                 access,
                                 initFunction=xBplusTreeBytes)