code: def show(cobertura_file, format, output, source, source_prefix):
      
      cobertura = Cobertura(cobertura_file, source=source)
      Reporter = reporters[format]
      reporter = Reporter(cobertura)
      report = reporter.generate()
  
      if not isinstance(report, bytes):
          report = report.encode('utf-8')
  
      isatty = True if output is None else output.isatty()
      click.echo(report, file=output, nl=isatty)
docs: show coverage summary of a Cobertura report