define the function inlineformset_factory with 20 arguments: parent_model, model, form set to ModelForm,
def inlineformset_factory ( parent_model , model , form = ModelForm , formset = BaseInlineFormSet , fk_name = None , fields = None , exclude = None , extra = 3 , can_order = False , can_delete = True , max_num = None , formfield_callback = None , widgets = None , validate_max = False , localized_fields = None , labels = None , help_texts = None , error_messages = None , min_num = None , validate_min = False ) :