title: got an unexpected keyword argument 'pk' on genric view
body: <p>I am trying to use Built-in <code>UpdateView</code> &amp; <code>DeleteView</code>, And I am keep getting TypeErrors, with the Exception Value:</p>
  
  <blockquote>
    <p><em>get() got an unexpected keyword argument 'pk'</em></p>
  </blockquote>
  
  <p><strong>views.py</strong></p>
  
  <pre><code>class SeqRunUpdate(LoginRequiredMixin, UpdateView):
      form_class = Sequencing_RunsForm
      model = Sequencing_Runs
  
  class SeqRunDelete(LoginRequiredMixin, DeleteView):
      model = Sequencing_RunsForm
      success_url = reverse_lazy('seq_run-private')
  </code></pre>
  
  <p><strong>urls.py</strong></p>
  
  <pre><code>url(r'^private/Samples/(?P&lt;pk&gt;[0-9]+)/$', views.SampleUpdate.as_view(), name='sample-update'),
  url(r'^private/Samples/(?P&lt;pk&gt;[0-9]+)/del$', views.SampleUpdate.as_view(), name='sample-delete'),
  </code></pre>
  
  <p><strong>models.py</strong></p>
  
  <pre><code>class Sequencing_Runs(models.Model):
      seq = models.CharField (max_length=250, unique=True, verbose_name='Sequence')
      date= models.DateField (auto_now=False, verbose_name='Date')
      classifaction = models.IntegerField(choices=CLASSIFACTION_CHOICES, default=1)
  
      def get_absolute_url(self):
          return reverse('table:seq_run-add')
  
      def __str__(self):
          return self.seq
  </code></pre>
  
  <p><strong>Template</strong></p>
  
  <pre><code>&lt;td&gt;&lt;form action="{% url 'table:seq_run-update' seq.pk %}" method="get" style="display: inline;"&gt;
                          {% csrf_token %}
                          &lt;button type="submit" class="btn btn-default"&gt;
                              &lt;span class="glyphicon glyphicon-edit"&gt;&lt;/span&gt;
                          &lt;/button&gt;
                      &lt;/form&gt;&lt;/td&gt;
                      &lt;td&gt;&lt;form action="{% url 'table:seq_run-delete' seq.pk %}" method="get" style="display: inline;"&gt;
                          {% csrf_token %}
                          &lt;button type="submit" class="btn btn-default"&gt;
                              &lt;span class="glyphicon glyphicon-trash"&gt;&lt;/span&gt;
                          &lt;/button&gt;
                      &lt;/form&gt;&lt;/td&gt;
  </code></pre>