def test_view_failed_delitem(attr):
    adata = gen_adata((10, 10))
    view = adata[5:7, :][:, :5]
    adata_hash = joblib.hash(adata)
    view_hash = joblib.hash(view)

    with pytest.raises(KeyError):
        getattr(view, attr).__delitem__("not a key")

    assert view.is_view
    assert adata_hash == joblib.hash(adata)
    assert view_hash == joblib.hash(view)
def edit_category(category_id):
    category = Category.query.filter_by(id=category_id).first_or_404()

    form = CategoryForm(obj=category)

    if form.validate_on_submit():
        form.populate_obj(category)
        flash(_("Category updated."), "success")
        category.save()

    return render_template("management/category_form.html", form=form,
                           title=_("Edit Category"))