def get_nvg_dimensions()

in example_opt_root/nevergrad_optimizer.py [0:0]

• 38 lines of code
• 8 McCabe index (conditional complexity)

    def get_nvg_dimensions(api_config):
        """Help routine to setup nevergrad search space in constructor.

        Take api_config as argument so this can be static.
        """
        # The ordering of iteration prob makes no difference, but just to be
        # safe and consistnent with space.py, I will make sorted.
        param_list = sorted(api_config.keys())

        all_args = {}
        all_prewarp = {}
        for param_name in param_list:
            param_config = api_config[param_name]

            param_type = param_config["type"]

            param_space = param_config.get("space", None)
            param_range = param_config.get("range", None)
            param_values = param_config.get("values", None)

            prewarp = None
            if param_type == "cat":
                assert param_space is None
                assert param_range is None
                arg = inst.var.SoftmaxCategorical(param_values)
            elif param_type == "bool":
                assert param_space is None
                assert param_range is None
                assert param_values is None
                arg = inst.var.OrderedDiscrete([False, True])
            elif param_values is not None:
                assert param_type in ("int", "ordinal", "real")
                arg = inst.var.OrderedDiscrete(param_values)
                # We are throwing away information here, but OrderedDiscrete
                # appears to be invariant to monotonic transformation anyway.
            elif param_type == "int":
                assert param_values is None
                # Need +1 since API in inclusive
                choices = range(int(param_range[0]), int(param_range[-1]) + 1)
                arg = inst.var.OrderedDiscrete(choices)
                # We are throwing away information here, but OrderedDiscrete
                # appears to be invariant to monotonic transformation anyway.
            elif param_type == "real":
                assert param_values is None
                assert param_range is not None
                # Will need to warp to this space sep.
                arg = inst.var.Gaussian(mean=0, std=1)
                prewarp = Real(warp=param_space, range_=param_range)
            else:
                assert False, "type %s not handled in API" % param_type

            all_args[param_name] = arg
            all_prewarp[param_name] = prewarp
        instrum = inst.Instrumentation(**all_args)
        return instrum, all_prewarp