def test_layers_view():
    X = np.array([[1, 2, 3], [4, 5, 6], [7, 8, 9]])
    L = np.array([[10, 11, 12], [13, 14, 15], [16, 17, 18]])
    real_adata = ad.AnnData(X)
    real_adata.layers["L"] = L
    view_adata = real_adata[1:, 1:]
    real_hash = joblib.hash(real_adata)
    view_hash = joblib.hash(view_adata)

    assert view_adata.is_view

    with pytest.raises(ValueError):
        view_adata.layers["L2"] = L + 2

    assert view_adata.is_view  # Failing to set layer item makes adata not view
    assert real_hash == joblib.hash(real_adata)
    assert view_hash == joblib.hash(view_adata)

    view_adata.layers["L2"] = L[1:, 1:] + 2

    assert not view_adata.is_view
    assert real_hash == joblib.hash(real_adata)
    assert view_hash != joblib.hash(view_adata)
def _create_swdb_group(self, group_id, pkg_types, pkgs):
        comps_group = self._base.comps._group_by_id(group_id)
        if not comps_group:
            self._raise_or_warn(self._skip_unavailable, _("Group id '%s' is not available.") % group_id)
            return None

        swdb_group = self._base.history.group.new(group_id, comps_group.name, comps_group.ui_name, pkg_types)

        try:
            for pkg in pkgs:
                name = pkg["name"]
                self._assert_type(name, str, "groups.packages.name", "string")
                installed = pkg["installed"]
                self._assert_type(installed, bool, "groups.packages.installed", "boolean")
                package_type = pkg["package_type"]
                self._assert_type(package_type, str, "groups.packages.package_type", "string")

                try:
                    swdb_group.addPackage(name, installed, libdnf.transaction.stringToCompsPackageType(package_type))
                except libdnf.error.Error as e:
                    raise TransactionError(str(e))

        except KeyError as e:
            raise TransactionError(
                _('Missing object key "{key}" in groups.packages.').format(key=e.args[0])
            )

        return swdb_group