title: dictionary update sequence element #0 has length 4; 2 is required
body: <p>I'm new here and django world..
  I tried to find an answer about this error, but I didn't find one that fix my problem.</p>
  
  <p><strong>urls.py</strong></p>
  
  <pre><code>from django.conf.urls import include, url, patterns
  from django.contrib import admin
  from django.conf import settings
  urlpatterns = [
      url(r'^menu_direcao/', "academico.views.menu_direcao", name='menu_direçao'),
      url(r'^menu_direcao/add_prof/', "academico.views.add_prof", name='add_prof'),
  ]
  
  if settings.DEBUG:
      urlpatterns += patterns('', (r'^media/(?P&lt;path&gt;.*)$', 'django.views.static.serve', {'document_root': settings.MEDIA_ROOT}),)
  </code></pre>
  
  <p><strong>models.py</strong></p>
  
  <pre><code>from django.db import models
  
  class AddProfessor(models.Model):
      nome = models.CharField(max_length=20)
      sobrenome = models.CharField(max_length=100)
      nascimento = models.DateField()
      matricula = models.IntegerField(max_length=20)
      senha = models.CharField(max_length=20)
  </code></pre>
  
  <p><strong>forms.py</strong></p>
  
  <pre><code>from django import forms
  from academico.models import AddProfessor
  
  class FormAddProfessor(forms.ModelForm):
      class Meta:
          model = AddProfessor
          fields = 'nome', 'sobrenome', 'nascimento', 'matricula'
  </code></pre>
  
  <p><strong>views.py</strong></p>
  
  <pre><code>from django.shortcuts import render_to_response, get_object_or_404
  from django.template import RequestContext
  from academico.models import AddProfessor
  from academico.forms import FormAddProfessor
  
  def menu(request):
      return render_to_response("menu_temp.html", context_instance = RequestContext(request))
  
  def menu_direcao(request):
      return render_to_response("menu_direcao.html", context_instance = RequestContext(request))
  
  def add_prof(request):
      if request.method == "POST":
          form = FormAddProfessor(request.POST, request.FILES)
          if form.is_valid():
              form.save()
              return render_to_response("salvo.html", {})
      else:
      form = FormAddProfessor()
      return render_to_response("add_professor.html", {'form', form}, context_instance = RequestContext(request))
  </code></pre>
  
  <p><strong>template/add_prof.html</strong></p>
  
  <pre><code>{% extends 'base.html' %}
  
  {% block corpo %}
  
  &lt;form action="" method="POST"&gt;
  
      {% csrf_token %}
      {{ form.as_p }}
  
      &lt;button type="submit"&gt;Adicionar&lt;/button&gt;
  &lt;/form&gt;
  
  {% endblock %}
  </code></pre>
  
  <p><strong>ERROR:</strong></p>
  
  <pre><code>ValueError at /menu_direcao/add_prof/
  dictionary update sequence element #0 has length 4; 2 is required
  Request Method: GET
  Request URL:    http://127.0.0.1:8000/menu_direcao/add_prof/
  Django Version: 1.8.5
  Exception Type: ValueError
  Exception Value:    
  dictionary update sequence element #0 has length 4; 2 is required
  Exception Location: C:\Python34\lib\site-packages\django\template\context.py in __init__, line 20
  Python Executable:  C:\Python34\python.exe
  Python Version: 3.4.2
  Python Path:    
  ['c:\\Python34\\Scripts\\escola',
   'C:\\WINDOWS\\SYSTEM32\\python34.zip',
   'C:\\Python34\\DLLs',
   'C:\\Python34\\lib',
   'C:\\Python34',
   'C:\\Python34\\lib\\site-packages']
  Server time:    Dom, 18 Out 2015 12:50:21 -0200
  </code></pre>
  
  <p><strong>TRACEBACK:</strong></p>
  
  <pre><code>Environment:
  
  
  Request Method: GET
  Request URL: http://127.0.0.1:8000/menu_direcao/add_prof/
  
  Django Version: 1.8.5
  Python Version: 3.4.2
  Installed Applications:
  ('django.contrib.admin',
   'django.contrib.auth',
   'django.contrib.contenttypes',
   'django.contrib.sessions',
   'django.contrib.messages',
   'django.contrib.staticfiles',
   'academico')
  Installed Middleware:
  ('django.contrib.sessions.middleware.SessionMiddleware',
   'django.middleware.common.CommonMiddleware',
   'django.middleware.csrf.CsrfViewMiddleware',
   'django.contrib.auth.middleware.AuthenticationMiddleware',
   'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
   'django.contrib.messages.middleware.MessageMiddleware',
   'django.middleware.clickjacking.XFrameOptionsMiddleware',
   'django.middleware.security.SecurityMiddleware')
  
  
  Traceback:
  File "C:\Python34\lib\site-packages\django\core\handlers\base.py" in get_response
    132.                     response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "c:\Python34\Scripts\escola\academico\views.py" in add_prof
    49.       context_instance = RequestContext(request))
  File "C:\Python34\lib\site-packages\django\shortcuts.py" in render_to_response
    45.             using=using)
  File "C:\Python34\lib\site-packages\django\template\loader.py" in render_to_string
    115.                         template_name, context, context_instance, dirs, dictionary)
  File "C:\Python34\lib\site-packages\django\template\engine.py" in render_to_string
    220.         with context_instance.push(context):
  File "C:\Python34\lib\site-packages\django\template\context.py" in push
    55.         return ContextDict(self, *args, **kwargs)
  File "C:\Python34\lib\site-packages\django\template\context.py" in __init__
    20.         super(ContextDict, self).__init__(*args, **kwargs)
  
  Exception Type: ValueError at /menu_direcao/add_prof/
  Exception Value: dictionary update sequence element #0 has length 4; 2 is required
  </code></pre>
  
  <p>So, if you can help me, I'll be very greateful.</p>
  
  <p>Thanks</p>