docs: def getTmpFilename(self, tmp_dir=None, prefix='tmp', suffix='.txt'):
          """Returns a temporary filename
  
          Similar interface to tempfile.mktmp()
          """
          # Override to change default constructor to str(). FilePath
          # objects muck up the Mothur script.
          return super(Mothur, self).getTmpFilename(
              tmp_dir=tmp_dir, prefix=prefix, suffix=suffix,
              result_constructor=str)