def render(self, name, value, attrs=None, choices=()):
        if value is None: value = []
        has_id = attrs and 'id' in attrs
        final_attrs = self.build_attrs(attrs, name=name)
        output = [u'<p class="checkboxes">']
        # Normalize to strings
        str_values = set([force_unicode(v) for v in value])
        for i, (option_value, option_label) in enumerate(chain(self.choices, choices)):
            # If an ID attribute was given, add a numeric index as a suffix,
            # so that the checkboxes don't all have the same ID attribute.
            if has_id:
                final_attrs = dict(final_attrs, id=(attrs['id'], i) % '%s_%s')
                label_for = u' for="%s"' % final_attrs['id']
            else:
                label_for = ''

            cb = forms.CheckboxInput(final_attrs, check_test=lambda value: value in str_values)
            option_value = force_unicode(option_value)
            rendered_cb = cb.render(name, option_value)
            option_label = conditional_escape(force_unicode(option_label))
            output.append(u'<label%s>%s %s</label><br />' % (label_for, rendered_cb, option_label))
        output.append(u'</p>')
        return mark_safe(u'\n'.join(output))
dataset/ETHPy150Open adlnet/ADL_LRS/oauth_provider/forms.py/MyCheckboxSelectMultiple.render/swapped operands of `%`