code: def rpm_qf_args(tags=None, separator=';'):
      
  
      if tags is None:
          tags = image_component_rpm_tags
  
      fmt = separator.join(["%%{%s}" % tag for tag in tags])
      return r"-qa --qf '{0}\n'".format(fmt)
docs: Return the arguments to pass to rpm to list RPMs in the format expected
      by parse_rpm_output.