@app.route('/album/<slug>')def show_album(slug):    r= get_root_dirs_files()    try:        r = r[slug]    except:        return 'Album Not Existing'    return render_template("albums.html",  dicts=r)@app.route("/delete/<path:object_name>")def delete(object_name):    obj = storage.get(object_name)    print obj    remove('./static/uploads/Pictures/%s' % (obj.name))    return redirect(url_for('show_album'???))delete函數(shù)中，url_for show_album 函數(shù)時，里面的參數(shù)要怎么填？