"""
1. Inherit from the normal RadioInput and copy the RadioInput __unicode__ method. Then change it up how you please:
"""
class RadioInputNoWrap(RadioInput):
    def __unicode__(self):
        if 'id' in self.attrs:
            label_for = ' for="%s_%s"' % (self.attrs['id'], self.index)
        else:
            label_for = ''
        choice_label = conditional_escape(force_unicode(self.choice_label))
        return mark_safe(u'%s<label%s>%s</label>' % (self.tag(), label_for, choice_label))        
"""
2. Then inherit from RadioSelect.renderer and copy the RadioFieldRenderer __iter__ method and patch it to call our new RadioInputNoWrap widget (you might need to patch __get_item__ as well):
"""
class RadioFieldRendererNoWrap(forms.RadioSelect.renderer):
    def __iter__(self):
        for i, choice in enumerate(self.choices):
            yield RadioInputNoWrap(self.name, self.value, self.attrs.copy(), choice, i)
"""
3. Then when you call the form just specify the new renderer:
"""
radio = forms.ChoiceField(widget=RadioSelect(renderer=RadioFieldRendererNoWrap),
                                         choices=answer_choices,)