@fluff.date_emitter
    def total(self, form):
        if form.form.get("date_delivery", None) is not None:
            days_after_delivery = (form.form["date_delivery"] - form.received_on.date()).days
            if form.xmlns in PNC_CHILD_IMMUNIZATION_AND_REG_HOME_DELIVERED_FORMS and days_after_delivery <= 1:
                yield [form.received_on.date(), 1]
dataset/ETHPy150Open dimagi/commcare-hq/custom/m4change/user_calcs/anc_hmis_report_calcs.py/PostnatalClinicVisitWithin1DayOfDeliveryCalculator.total/swapped operands of `-`