Swiper 幻灯片背景

Question

帮助。我不知道如何通过缩略图将图像设置为背景？我需要通过缩略图插入背景。我该怎么做？

<section class="slider">
<div class="swiper-container">
  <div class="swiper-wrapper">
    {% for new in news %}
    {% load thumbnail %}

    **<div class="swiper-slide" data-background="{% static 'images/slide01.jpg' %}"> **

      <div class="slide-inner">

        {% thumbnail new.image_1 "1280x720" crop="center" upscale=True as im %}
        <figure><img src="{ im.url} " alt="Image"></figure>
        {% endthumbnail %}
        <h2>{{ new.text|truncatechars:120 }}</h2>
        <div class="link">
          <a href="{ blog_single new.id} ">SEE CASE STUDY</a>
        </div>
        <!-- end link -->
      </div>
      <!-- end slide-inner -->
    </div>
    <!-- end swiper-slide -->
    {% endfor %}

    <!-- end swiper-slide -->
  </div>