如何解决从视图导入Django的功能？

在学习Django的路上，我一直在关注这本书

我的views.py包含-

def addPublisher(request):
    if request == 'POST':
        form = PublisherForm(request.POST)
        if form.is_valid:
            form.save()
            return HttpResponseRedirect('add_publisher/thanks/')
        else:
            form = PublisherForm()
        return render_to_response('book/addPublisher.html',{'form':form})

我的urls.py具有以下代码-

from views import *

urlpatterns = [
    url(r'^add/$',addPublisher)
    ]

将addPublisher函数导入到urls.py时，出现此错误。

name 'addPublisher' is not defined