分页插件

<nav aria-label="Page navigation ">
                        <ul class="pagination">

                            {% if all_book_list.has_previous %}
                                <li><a href="/index?page={{ all_book_list.previous_page_number }}"
                                       aria-label="Previous">上一页</a></li>
                            {% else %}
                                <li class="disabled"><a href="" aria-label="Previous">上一页</a></li>
                            {% endif %}

                            {% for index in page_range %}
                                {% if num == index %}
                                    <li class="active"><a href="/index?page={{ index }}">{{ index }}</a></li>
                                {% else %}
                                    <li><a href="/index?page={{ index }}">{{ index }}</a></li>
                                {% endif %}

                            {% endfor %}


                            {% if all_book_list.has_next %}
                                <li><a href="/index?page={{ all_book_list.next_page_number }}"
                                       aria-label="Previous">下一页</a></li>
                            {% else %}
                                <li class="disabled"><a href="" aria-label="Previous">下一页</a></li>
                            {% endif %}

                        </ul>
                    </nav>