docs: def fetch(TableName,M,I,numin,numax,ParameterGroups=[],Parameters=[]):
      """
      INPUT PARAMETERS: 
          TableName:   local table name to fetch in (required)
          M:           HITRAN molecule number       (required)
          I:           HITRAN isotopologue number   (required)
          numin:       lower wavenumber bound       (required)
          numax:       upper wavenumber bound       (required)
      OUTPUT PARAMETERS: 
          none
      ---
      DESCRIPTION:
          Download line-by-line data from HITRANonline server
          and save it to local table. The input parameters M and I
          are the HITRAN molecule and isotopologue numbers.
          This function results in a table containing single 
          isotopologue specie. To have multiple species in a 
          single table use fetch_by_ids instead.
      ---
      EXAMPLE OF USAGE:
          fetch('HOH',1,1,4000,4100)
      ---
      """
      queryHITRAN(TableName,[ISO[(M,I)][ISO_INDEX['id']]],numin,numax,
                  pargroups=ParameterGroups,params=Parameters)
      iso_name = ISO[(M,I)][ISO_INDEX['iso_name']]
      Comment = 'Contains lines for '+iso_name
      Comment += ('\n in %.3f-%.3f wavenumber range' % (numin,numax))
      comment(TableName,Comment)