三步实现Django Paginator分页的方法

from django.db import models class Subject(models.Model):     """学科""”     no = models.AutoField(primary_key=True, verbose_name="编号")     name = models.CharField(max_length=31, verbose_name="名称")     intro = models.CharField(max_length=511, verbose_name="介绍")     def __str__(self):         return self.name       class Meta:         db_table = 'tb_subject'         verbose_name_plural = "学科"

from django.shortcuts import renderfrom django.core.paginator import Paginator, InvalidPage, EmptyPage, PageNotAnIntegerfrom vote.models import Subjectdef show_subject(request):  """查询学科"""  #查询Subject 表的所有数据  subjects = Subject.objects.all().order_by("no”)  #使用Paginator模块对数据分页，一页5条数据  paginator = Paginator(subjects, 5)  #使用request.GET.get()函数获取uri中的page参数的数值  page = request.GET.get('page')  try:    #通过获取上面的page参数，查询此page是否为整数并且是否可用    subject_obj = paginator.page(page)  except PageNotAnInteger:    subject_obj = paginator.page(1)  except (EmptyPage, InvalidPage):    subject_obj = paginator.page(paginator.num_pages)  return render(request, "vote/subject.html", {'subject_list': subject_obj})

<div class="pull-right" style="margin-right: 480px;margin-top: 0px”>        <!― 分页功能-->        <nav>          <ul class="pagination”>            <!― 分页功能前端的方向箭头代码-->            {% if subject_list.has_previous %}            <li class="enabled">              <a href="?page={{ subject_list.previous_page_number }}" rel="external nofollow" aria-label="Previous">                <span aria-hidden="true">«</span>              </a>            </li>            {% endif %}            <!― 分页功能显示页码的中间部分代码-->            {% for page_num in subject_list.paginator.page_range %}              {% if page_num == subject_list.number %}                <li class="active">                  <a href="#" rel="external nofollow" >                    {{ page_num }}                    <span class="sr-only">(current)</span>                  </a>                </li>              {% else %}                <li>                  <a href="?page={{ page_num }}" rel="external nofollow" >{{ page_num }}                    <span class="sr-only">(current)</span>                  </a>                </li>              {% endif %}            {% endfor %}            <!― 分页功能末端的方向箭头代码-->            {% if subject_list.has_next %}            <li class="enabled">              <a href="?page={{ subject_list.next_page_number }}" rel="external nofollow" aria-label="last">                <span aria-hidden="true">»</span>              </a>            </li>            {% endif %}          </ul>        </nav></div>