old_contents: from django import forms
  from django.utils.translation import ugettext_lazy as _
  
  
  def boolean_coerce(value):
      if value in {1, '1'}:
          return True
      if value in {0, '0'}:
          return False
  
  
  class BooleanChoiceField(forms.TypedChoiceField):
      widget = forms.RadioSelect
  
      def __init__(self, *args, **kwargs):
          defaults = {
              'choices': [
                  ('1', _('Yes')),
                  ('0', _('No')),
              ],
              'coerce': boolean_coerce,
              'required': True,
          }
          defaults.update(kwargs)
          super(BooleanChoiceField, self).__init__(*args, **defaults)
  
      def prepare_value(self, value):
          if value is not None:
              return str(int(value))
  
new_contents: from django import forms
  from django.utils.translation import ugettext_lazy as _
  
  
  def boolean_coerce(value):
      if value in {1, '1'}:
          return True
      if value in {0, '0'}:
          return False
  
  
  class BooleanChoiceField(forms.TypedChoiceField):
      widget = forms.Select
  
      def __init__(self, *args, **kwargs):
          defaults = {
              'choices': [
                  ('1', _('Yes')),
                  ('0', _('No')),
              ],
              'coerce': boolean_coerce,
              'required': True,
          }
          defaults.update(kwargs)
          super(BooleanChoiceField, self).__init__(*args, **defaults)
  
      def prepare_value(self, value):
          if value is not None:
              return str(int(value))
  
subject: Switch BooleanChoiceField to use Select widget instead of the RadioSelect widget