Method _format_dict

pymoo/core/problem.py:250–283

(self, out, N, return_values_of)

                out[k] = anp.array(out[k])

    def _format_dict(self, out, N, return_values_of):

        # get the default output shape for the default values
        shape = default_shape(self, N)

        # finally the array to be returned
        ret = {}

        # for all values that have been set in the user implemented function
        for name, v in out.items():
            # only if they have truly been set
            if v is not None:
                # if there is a shape to be expected
                if name in shape:
                    if isinstance(v, list):
                        v = anp.column_stack(v)

                    try:
                        v = v.reshape(shape[name])
                    except Exception as e:
                        raise Exception(
                            f"Problem Error: {name} can not be set, expected shape {shape[name]} but provided {v.shape}",
                            e,
                        )

                ret[name] = v

        # if some values that are necessary have not been set
        for name in return_values_of:
            if name not in ret:
                s = shape.get(name, N)
                ret[name] = np.full(s, np.inf)

        return ret

    @Cache
    def nadir_point(self, *args, **kwargs):