title: Unresolved reference in PyCharm
body: <p>My models.py is</p>
  
  <pre><code>from django.db import models
  
  class Post(models.Model):
  title = models.CharField(max_length=140)
  body = models.TextField()
  date = models.DateTimeField()
  
  def __str__(self):
      return self.title
  </code></pre>
  
  <p>My admin.py is </p>
  
  <pre><code>from django.contrib import admin
  from blog1.models import Post
  
  admin.site.register(Post)
  </code></pre>
  
  <p>to add in my administration a Post group for blog.</p>
  
  <p>And my blog1/urls.py is </p>
  
  <pre><code>from django.conf.urls import url, include
  from django.views.generic import ListView, DetailView
  from blog1.models import Post
  
  urlpatterns = [ url(r'^$', ListView.as_view(queryset=Post.objects.all() .order_by("-date")[:25],
                                           template_name="blog1/blog1.html"))]
  </code></pre>
  
  <p>It says unresolved reference for my from blog1.models import Post code as in admin.py also. Can you resolve this issue, i am stuck at here.</p>