How to use the fire.formatting function in fire

arg_strings = [formatting.Underline(arg.upper())
                     for arg in args_with_no_defaults]
    else:
      arg_strings = [
          '--{arg}={arg_upper}'.format(
              arg=arg, arg_upper=formatting.Underline(arg.upper()))
          for arg in args_with_no_defaults]
    arg_and_flag_strings.extend(arg_strings)

  # If there are any arguments that are treated as flags:
  if args_with_defaults or spec.kwonlyargs or spec.varkw:
    arg_and_flag_strings.append('')

  if spec.varargs:
    varargs_string = '[{varargs}]...'.format(
        varargs=formatting.Underline(spec.varargs.upper()))
    arg_and_flag_strings.append(varargs_string)

  return ' '.join(arg_and_flag_strings)

Args:
    flag: The name of the flag.
    docstring_info: A docstrings.DocstringInfo namedtuple with information about
      the containing function's docstring.
    required: Whether the flag is required. Keyword-only arguments (only in
      Python 3) become required flags, whereas normal keyword arguments become
      optional flags.
  Returns:
    A string to be used in constructing the help screen for the function.
  """
  description = _GetArgDescription(flag, docstring_info)

  flag_string_template = '--{flag_name}={flag_name_upper}'
  flag = flag_string_template.format(
      flag_name=flag,
      flag_name_upper=formatting.Underline(flag.upper()))
  if required:
    flag += ' (required)'
  return _CreateItem(flag, description, indent=4)

metadata: Metadata for the component, including whether it accepts
      positional arguments.

  Returns:
    The constructed args and flags string.
  """
  args_with_no_defaults = spec.args[:len(spec.args) - len(spec.defaults)]
  args_with_defaults = spec.args[len(spec.args) - len(spec.defaults):]

  # Check if positional args are allowed. If not, require flag syntax for args.
  accepts_positional_args = metadata.get(decorators.ACCEPTS_POSITIONAL_ARGS)

  arg_and_flag_strings = []
  if args_with_no_defaults:
    if accepts_positional_args:
      arg_strings = [formatting.Underline(arg.upper())
                     for arg in args_with_no_defaults]
    else:
      arg_strings = [
          '--{arg}={arg_upper}'.format(
              arg=arg, arg_upper=formatting.Underline(arg.upper()))
          for arg in args_with_no_defaults]
    arg_and_flag_strings.extend(arg_strings)

  # If there are any arguments that are treated as flags:
  if args_with_defaults or spec.kwonlyargs or spec.varkw:
    arg_and_flag_strings.append('')

  if spec.varargs:
    varargs_string = '[{varargs}]...'.format(
        varargs=formatting.Underline(spec.varargs.upper()))
    arg_and_flag_strings.append(varargs_string)

def _CreateAvailabilityLine(header, items,
                            header_indent=2, items_indent=25,
                            line_length=LINE_LENGTH):
  items_width = line_length - items_indent
  items_text = '\n'.join(formatting.WrappedJoin(items, width=items_width))
  indented_items_text = formatting.Indent(items_text, spaces=items_indent)
  indented_header = formatting.Indent(header, spaces=header_indent)
  return indented_header + indented_items_text[len(indented_header):] + '\n'

output = []
  show_help = False
  for help_flag in ('-h', '--help'):
    if help_flag in component_trace.elements[-1].args:
      show_help = True

  if show_help:
    command = '{cmd} -- --help'.format(cmd=component_trace.GetCommand())
    print('INFO: Showing help with the command {cmd}.\n'.format(
        cmd=pipes.quote(command)), file=sys.stderr)
    help_text = helptext.HelpText(result, trace=component_trace,
                                  verbose=component_trace.verbose)
    output.append(help_text)
    Display(output, out=sys.stderr)
  else:
    print(formatting.Error('ERROR: ')
          + component_trace.elements[-1].ErrorAsStr(),
          file=sys.stderr)
    error_text = helptext.UsageText(result, trace=component_trace,
                                    verbose=component_trace.verbose)
    print(error_text, file=sys.stderr)

def _CreateAvailabilityLine(header, items,
                            header_indent=2, items_indent=25,
                            line_length=LINE_LENGTH):
  items_width = line_length - items_indent
  items_text = '\n'.join(formatting.WrappedJoin(items, width=items_width))
  indented_items_text = formatting.Indent(items_text, spaces=items_indent)
  indented_header = formatting.Indent(header, spaces=header_indent)
  return indented_header + indented_items_text[len(indented_header):] + '\n'

def _CreateArgItem(arg, docstring_info):
  """Returns a string describing a positional argument.

  Args:
    arg: The name of the positional argument.
    docstring_info: A docstrings.DocstringInfo namedtuple with information about
      the containing function's docstring.
  Returns:
    A string to be used in constructing the help screen for the function.
  """
  description = _GetArgDescription(arg, docstring_info)

  arg = arg.upper()
  return _CreateItem(formatting.BoldUnderline(arg), description, indent=4)

def _CreateOutputSection(name, content):
  return """{name}
{content}""".format(name=formatting.Bold(name),
                    content=formatting.Indent(content, 4))