三步实现 Django Paginator 分页

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 render  from django.core.paginator import Paginator, InvalidPage, EmptyPage, PageNotAnInteger  from vote.models import Subject  def 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})