How to use the pcdsutils.utils function in pcdsutils

happi_client = None

    # Load and add each device
    devices = list()

    klass_regex = re.compile(
        r'([a-zA-Z][a-zA-Z\.\_]*)\[(\{.+})*[\,]*\]'  # noqa
    )

    for device_name in device_names:
        logger.info("Loading %r ...", device_name)
        result = klass_regex.findall(device_name)
        if len(result) > 0:
            try:
                klass, args = result[0]
                klass = pcdsutils.utils.import_helper(klass)

                default_kwargs = {"name": "device"}
                if args:
                    kwargs = ast.literal_eval(args)
                    default_kwargs.update(kwargs)

                if fake_devices:
                    klass = make_fake_device(klass)
                    # Give default value to missing positional args
                    # This might fail, but is best effort
                    for arg in inspect.getfullargspec(klass).args:
                        if arg not in default_kwargs and arg != 'self':
                            default_kwargs[arg] = 'FAKE'

                device = klass(**default_kwargs)
                devices.append(device)