def test_view_of_view_modification():
    adata = ad.AnnData(np.zeros((10, 10)))
    adata[0, :][:, 5:].X = np.ones(5)
    assert np.all(adata.X[0, 5:] == np.ones(5))
    adata[[1, 2], :][:, [1, 2]].X = np.ones((2, 2))
    assert np.all(adata.X[1:3, 1:3] == np.ones((2, 2)))

    adata.X = sparse.csr_matrix(adata.X)
    adata[0, :][:, 5:].X = np.ones(5) * 2
    assert np.all(asarray(adata.X)[0, 5:] == np.ones(5) * 2)
    adata[[1, 2], :][:, [1, 2]].X = np.ones((2, 2)) * 2
    assert np.all(asarray(adata.X)[1:3, 1:3] == np.ones((2, 2)) * 2)
def unban_user(user_id=None):
    if not Permission(CanBanUser, identity=current_user):
        flash(_("You do not have the permissions to unban this user."),
              "danger")
        return redirect(url_for("management.overview"))

    # ajax request
    if request.is_xhr:
        ids = request.get_json()["ids"]

        data = []
        for user in User.query.filter(User.id.in_(ids)).all():
            if user.unban():
                data.append({
                    "id": user.id,
                    "type": "unban",
                    "reverse": "ban",
                    "reverse_name": _("Ban"),
                    "reverse_url": url_for("management.ban_user",
                                           user_id=user.id)
                })

        return jsonify(
            message="{} users unbanned.".format(len(data)),
            category="success",
            data=data,
            status=200
        )

    user = User.query.filter_by(id=user_id).first_or_404()

    if user.unban():
        flash(_("User is now unbanned."), "success")
    else:
        flash(_("Could not unban user."), "danger")

    return redirect(url_for("management.banned_users"))