TypeError: view must be a callable or a list/tuple in the case of include(). in urls.py

Hi,

   I'm working in Django 1.10 and I got the type error  in the below file at this line " url(r'^$', views.dashboard, name = 'dashboard'),"

from django.conf.urls import include, url

from . import views

urlpatterns = [

    #preview login view

    #url(r'^login/$',views.user_login, name='login')

    # logged - in user dashboard

    url(r'^$', views.dashboard, name = 'dashboard'),

    #login / logout urls

    url(r'^login/$', 'django.contrib.auth.views.login', name='login'),

    url(r'^logout/$', 'django.contrib.auth.views.logout', name='logout'),

    url(r'^logout-then-login/$','django.contrib.auth.views.logout_then_login', name='logout_then_login')

]

I'm new to Django and stuck because of this 

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