code: def simple_ins_from_obs(obsnames, insfilename='model.output.ins'):
      
      with open(insfilename, 'w') as ofp:
          ofp.write('pif ~\n')
          [ofp.write('!{0}!\n'.format(cob)) for cob in obsnames]
docs: writes an instruction file that assumes wanting to read the values names in obsnames in order
      one per line from a model output file
      Args:
          obsnames: list of obsnames to read in
          insfilename: filename for INS file (default: model.output.ins)
  
      Returns:
          writes a file <insfilename> with each observation read off a line