Django choicefield choices not displaying
<p>Im using a choicefield and setting 2 values - 'students', 'teachers',
but for some reason when the form displays it only shows 'teachers' and not 'students'.</p>

<pre><code>class SignUpShortForm(SignUpForm):
    role = forms.ChoiceField(
        choices=[],
        widget=forms.Select(attrs={'class':'form-control'}),
        label='I am a...',
    )
    self.fields['role'].choices = [('Teacher', 'Teacher2')]
</code></pre>