Python argparse._StoreConstAction() Examples

def _get_help_string(self, action):
        if isinstance(action, argparse._StoreConstAction):
            return action.help
        else:
            return super()._get_help_string(action) 

def main():

    if len(sys.argv) != 2:
        return 1

    comp_words = iter(sys.argv[1].split()[1:])

    parser = get_parser()

    seen = []
    for word in comp_words:
        if word in parser.choices:
            parser = parser[word]
            continue
        actions = {name: action for action in parser._actions for name in action.option_strings}
        first, _, rest = word.partition('=')
        is_one_word_store_action = rest and first in actions
        if is_one_word_store_action:
            word = first
        seen.append(word)
        try:
            action = actions[word]
        except KeyError:
            break
        if isinstance(action, argparse._StoreAction) and not isinstance(action, argparse._StoreConstAction):
            if not is_one_word_store_action:
                try:
                    next(comp_words)
                except StopIteration:
                    break

    options = list(parser.choices)

    options = [format_option(option, argument_required=False) for option in options]
    options.extend(get_options(parser))
    options = [option for option in options if option.rstrip('= ') not in seen]

    print('\n'.join(options))
    return 0 

def convert_setting_to_command_line_arg(self, action, key, value):
        args = []
        if action is None:
            command_line_key = \
                self.get_command_line_key_for_unknown_config_file_setting(key)
        else:
            command_line_key = action.option_strings[-1]

        if isinstance(action, argparse._StoreTrueAction):
            if value is True:
                args.append(command_line_key)
        elif isinstance(action, argparse._StoreFalseAction):
            if value is False:
                args.append(command_line_key)
        elif isinstance(action, argparse._StoreConstAction):
            if value == action.const:
                args.append(command_line_key)
        elif isinstance(action, argparse._CountAction):
            for _ in range(value):
                args.append(command_line_key)
        elif action is not None and value == action.default:
            pass
        elif isinstance(value, list):
            args.append(command_line_key)
            args.extend([str(e) for e in value])
        else:
            args.append(command_line_key)
            args.append(str(value))
        return args 

def format_cli (self, report):
    usage = self.app.devices[report.fields.get('device')]
    task = self.app.actions.commands['add'].usages.commands[usage.name].method.commands[report.fields['use']]

    line = [ 'openaps', 'use', usage.name, report.fields.get('use') ]
    params = [ ]
    config = task.method.from_ini(dict(**report.fields))

    for act in task.method.parser._actions:
      def accrue (switch):
        if switch.startswith('-'):
          params.insert(0, switch)
        else:
          params.append(switch)

      # if act.dest in report.fields:
      if act.dest in config:
        if act.option_strings:

          if report.fields.get(act.dest):
            if type(act) in [argparse._StoreTrueAction, argparse._StoreFalseAction ]:
              expected = act.const
              expected = act.default
              found = config.get(act.dest)
              if type(act) is argparse._StoreFalseAction:
                expected = True
                found = found

              if expected != found:
                accrue(act.option_strings[0])
            elif type(act) in [argparse._StoreConstAction, ]:
              expected = act.default
              found = config.get(act.dest)
              if expected != found:
                accrue(act.option_strings[0])
            elif type(act) in [argparse._AppendAction, ]:
              if config.get(act.dest) != act.default:
                for item in config.get(act.dest):
                  accrue(act.option_strings[0] + ' ' + item + '')
              pass
            elif type(act) in [argparse._StoreAction, ]:
              if config.get(act.dest) != act.default:
                accrue(act.option_strings[0] + ' "' + report.fields.get(act.dest) + '"')
            else:
              accrue(act.option_strings[0] + ' "' + report.fields.get(act.dest) + '"')
        else:
          accrue(report.fields.get(act.dest))


    return ' '.join(line + params) 

def _add_to_defaults(cls, a_parser, defaults, a_args=None, a_namespace=None, a_parsed_args=None):
        actions = [
            a for a in a_parser._actions
            if isinstance(a, _StoreAction) or isinstance(a, _StoreConstAction)
        ]
        args_dict = {}
        try:
            if isinstance(a_parsed_args, dict):
                args_dict = a_parsed_args
            else:
                if a_parsed_args:
                    args_dict = a_parsed_args.__dict__
                else:
                    args_dict = call_original_argparser(a_parser, args=a_args, namespace=a_namespace).__dict__
            defaults_ = {
                a.dest: args_dict.get(a.dest) if (args_dict.get(a.dest) is not None) else ''
                for a in actions
            }
        except Exception:
            # don't crash us if we failed parsing the inputs
            defaults_ = {
                a.dest: a.default if a.default is not None else ''
                for a in actions
            }

        full_args_dict = copy(defaults)
        full_args_dict.update(args_dict)
        defaults.update(defaults_)

        # deal with sub parsers
        sub_parsers = [
            a for a in a_parser._actions
            if isinstance(a, _SubParsersAction)
        ]
        for sub_parser in sub_parsers:
            if sub_parser.dest and sub_parser.dest != SUPPRESS:
                defaults[sub_parser.dest] = full_args_dict.get(sub_parser.dest) or ''
            for choice in sub_parser.choices.values():
                # recursively parse
                defaults = cls._add_to_defaults(
                    a_parser=choice,
                    defaults=defaults,
                    a_parsed_args=a_parsed_args or full_args_dict
                )

        return defaults