title: Python/Django: Creating a simpler list from values_list()
body: <p>Consider:</p>
  
  <pre><code>&gt;&gt;&gt;jr.operators.values_list('id')
  [(1,), (2,), (3,)]
  </code></pre>
  
  <p>How does one simplify further to:</p>
  
  <pre><code>['1', '2', '3']
  </code></pre>
  
  <p>The purpose:</p>
  
  <pre><code>class ActivityForm(forms.ModelForm):
      def __init__(self, *args, **kwargs):
          super(ActivityForm, self).__init__(*args, **kwargs)
          if self.initial['job_record']:
              jr = JobRecord.objects.get(pk=self.initial['job_record'])
  
              # Operators
              self.fields['operators'].queryset = jr.operators
  
              # select all operators by default
              self.initial['operators'] = jr.operators.values_list('id') # refined as above.
  </code></pre>