def add_view(self, request, form_url='', extra_context=None):
        inline_admin_formsets = []
        for inline, formset in zip(inline_instances, formsets):
            fieldsets = list(inline.get_fieldsets(request))
            readonly = list(inline.get_readonly_fields(request))
            prepopulated = dict(inline.get_prepopulated_fields(request))
            inline_admin_formset = helpers.InlineAdminFormSet(inline, formset,
                fieldsets, prepopulated, readonly, model_admin=self)
            inline_admin_formsets.append(inline_admin_formset)

def modelformset_factory(model, form=ModelForm, formfield_callback=None,
                         formset=BaseModelFormSet, extra=1, can_delete=False,
                         can_order=False, max_num=None, fields=None, exclude=None,
                         widgets=None, validate_max=False, localized_fields=None,
                         labels=None, help_texts=None, error_messages=None,
                         min_num=None, validate_min=False, field_classes=None):
    """
    Returns a FormSet class for the given Django model class.
    """
    meta = getattr(form, 'Meta', None)
    if meta is None:
        meta = type(str('Meta'), (object,), {})
    if (getattr(meta, 'fields', fields) is None and
            getattr(meta, 'exclude', exclude) is None):
        raise ImproperlyConfigured(
            "Calling modelformset_factory without defining 'fields' or "
            "'exclude' explicitly is prohibited."
        )
    form = modelform_factory(model, form=form, fields=fields, exclude=exclude,
                             formfield_callback=formfield_callback,
                             widgets=widgets, localized_fields=localized_fields,
                             labels=labels, help_texts=help_texts,
                             error_messages=error_messages, field_classes=field_classes)
    FormSet = formset_factory(form, formset, extra=extra, min_num=min_num, max_num=max_num,
                              can_order=can_order, can_delete=can_delete,
                              validate_min=validate_min, validate_max=validate_max)
    FormSet.model = model
    return FormSet

def modelform_factory(model, form=ModelForm, fields=None, exclude=None,
                      formfield_callback=None, widgets=None, localized_fields=None,
                      labels=None, help_texts=None, error_messages=None,
                      field_classes=None):
    attrs = {'model': model}
    if fields is not None:
        attrs['fields'] = fields
    if exclude is not None:
        attrs['exclude'] = exclude
    if widgets is not None:
        attrs['widgets'] = widgets
    if localized_fields is not None:
        attrs['localized_fields'] = localized_fields
    if labels is not None:
        attrs['labels'] = labels
    if help_texts is not None:
        attrs['help_texts'] = help_texts
    if error_messages is not None:
        attrs['error_messages'] = error_messages
    if field_classes is not None:
        attrs['field_classes'] = field_classes
#
    # If parent form class already has an inner Meta, the Meta we're
    # creating needs to inherit from the parent's inner meta.
    parent = (object,)
    if hasattr(form, 'Meta'):
        parent = (form.Meta, object)
    Meta = type(str('Meta'), parent, attrs)
#
    # Give this new form class a reasonable name.
    class_name = model.__name__ + str('Form')                                          # (1)
#
    # Class attributes for the new form class.
    form_class_attrs = {
        'Meta': Meta,
        'formfield_callback': formfield_callback
    }
#
    if (getattr(Meta, 'fields', None) is None and
            getattr(Meta, 'exclude', None) is None):
        raise ImproperlyConfigured(
            "Calling modelform_factory without defining 'fields' or "
            "'exclude' explicitly is prohibited."
        )
#
    # Instantiate type(form) in order to use the same metaclass as form.
    return type(form)(class_name, (form,), form_class_attrs)                                    # (2)