code: def find(self, vName):
          
  
          refNum = _C.VSfind(self._hdf_inst._id, vName)
          _checkErr("find", refNum, "cannot find vdata %s" % vName)
          return refNum
docs: Get the reference number of a vdata given its name.
          The vdata can then be opened (attached) by passing this
          reference number to the attach() method.
  
          Args::
  
            vName    Name of the vdata for which the reference number
                     is needed. vdatas names are not guaranteed to be
                     unique. When more than one vdata bear the same name,
                     find() will return the refnum of the first one founmd.
  
          Returns::
  
            vdata reference number. 0 is returned if the vdata does not exist.
  
          C library equivalent : VSfind