code: def _print_exception_list(exceptions, message, output_file=None):
      
      output_file = output_file or sys.stderr
      message = 'Exception %s:\n' % message
      for exc_type, exc_value, exc_traceback in exceptions:
          output_file.write(message)
          traceback.print_exception(exc_type, exc_value, exc_traceback,
                                    file=output_file)
          output_file.write('\n')
docs: Given a list of sys.exc_info tuples, print them all using the traceback
      module preceeded by a message and separated by a blank line.