title: Import doesn't work
body: <p>I have a wierd problem.  There are two apps in my django project . In one app one of the imports made in views.py is fine but in the other one the same import shows me an error. </p>
  
  <p>Here is views.py  where import is fine: </p>
  
  <pre><code>from django.shortcuts import get_object_or_404, render_to_response
  from models import Category,Product
  from django.template.context import RequestContext
  from django.core import urlresolvers
  from cart import cart
  from catalog.forms import ProductAddToCartForm
  from django.http.response import HttpResponseRedirect
  # Create your views here.
  
  def index(request, template_name="catalog/index.html"):
  
      page_title = 'Extremely interesting and cheap goods'
  
      return render_to_response(template_name, locals(),
                                context_instance=RequestContext(request))
  
  
  
  def show_category(request,category_slug,template_name='catalog/category.html'):
      c = get_object_or_404(Category, slug = category_slug)
      products = c.product_set.all()
      page_title = c.name
      meta_keywords = c.meta_keywords
      meta_description = c.meta_description
  
      return render_to_response(template_name,locals(),
                                context_instance=RequestContext(request))  
  
  
  
  def show_product(request, product_slug,template_name="catalog/product.html"):
      p = get_object_or_404(Product,slug=product_slug) 
      categories = p.categories.all()
      page_title = p.name
      meta_keywords = p.meta_keywords
      meta_description = p.meta_description
      if request.method =='POST':
          postdata=request.POST.copy()
          form = ProductAddToCartForm(request,postdata)
          if form.is_valid():
              cart.add_to_cart(request)
              if request.session.test_cookie_worked():
                  request.session.delete_test_cookie()
              url = urlresolvers.reverse('show_cart')
              return HttpResponseRedirect(url)
      else:
          form = ProductAddToCartForm(request = request,label_suffix=':')
      form.fields['product_slug'].widget.attrs['value'] = product_slug
      request.session.set_test_cookie()
      return render_to_response("catalog/product.html",locals(),
                                context_instance=RequestContext(request))    
  </code></pre>
  
  <p>And here is views.py where import doesn't work:</p>
  
  <pre><code>from django.template.context import RequestContext
  from django.shortcuts import render_to_response
  from cart import cart
  
  def show_cart(request,template_name="cart/cart.html"):
      if request.method == 'POST':
          postdata = request.POST.copy()
          if postdata['submit'] == 'Remove':
              cart.remove_from_cart(request)
          if postdata['submit'] == 'Update':
              cart.update_cart(request)
      cart_items = cart.get_cart_items(request)
      page_title = 'Shopping Cart'
      cart_subtotal = cart.cart_subtotal(request)
      return render_to_response(template_name,locals(),
                                context_instance=RequestContext(request))
  </code></pre>
  
  <p>The import I am speaking about is : from cart import cart. The second views.py is in the same django app where cart.py I am trying to import        </p>