Method update_dicts

xarray/structure/alignment.py:404–424

(
            key: MatchingIndexKey,
            idx: Index,
            idx_vars: dict[Hashable, Variable],
            need_reindex: bool,
        )

        new_index_vars: dict[Hashable, Variable] = {}

        def update_dicts(
            key: MatchingIndexKey,
            idx: Index,
            idx_vars: dict[Hashable, Variable],
            need_reindex: bool,
        ):
            reindex[key] = need_reindex
            aligned_indexes[key] = idx
            aligned_index_vars[key] = idx_vars

            for name, var in idx_vars.items():
                if name in new_indexes:
                    other_idx = new_indexes[name]
                    other_var = new_index_vars[name]
                    raise AlignmentError(
                        f"cannot align objects on coordinate {name!r} because of conflicting indexes\n"
                        f"first index: {idx!r}\nsecond index: {other_idx!r}\n"
                        f"first variable: {var!r}\nsecond variable: {other_var!r}\n"
                    )
                new_indexes[name] = idx
                new_index_vars[name] = var

        for key, matching_indexes in self.all_indexes.items():
            matching_index_vars = self.all_index_vars[key]