Method resolve

lib/matplotlib/colors.py:3376–3385

(norm)

            raise ValueError("MultiNorm must be assigned at least one norm")

        def resolve(norm):
            if isinstance(norm, str):
                scale_cls = _api.getitem_checked(scale._scale_mapping, norm=norm)
                return mpl.colorizer._auto_norm_from_scale(scale_cls)()
            elif isinstance(norm, Normalize):
                return norm
            else:
                raise ValueError(
                    "Each norm assigned to MultiNorm must be "
                    f"of type `str`, or `Normalize`, not {type(norm)}")

        self._norms = tuple(resolve(norm) for norm in norms)