@app.route('/')
def index():

    current_page = request.args.get('page', 1, type=int)    # 当前页
    per_page = 2        # 每页条数

    result = User.query.filter().paginate(current_page, per_page)

    # 组织数据
    d = {}
    d['user_list'] = result.items       # 数据集
    d['current_page'] = result.page     # 当前页
    d['total_page'] = result.pages      # 总页数

    return render_template('paginate.html', data=d)