from collections import defaultdict


def format_schedule(data):

    rasp = data.get("rasp", [])

    if not rasp:
        return "🎉 Сегодня занятий нет."


    days = defaultdict(list)


    for lesson in rasp:

        days[
            lesson["день_недели"]
        ].append(lesson)


    text = ""


    for day, lessons in days.items():

        text += f"\n📅 {day}\n\n"


        for item in sorted(
            lessons,
            key=lambda x: x["номерЗанятия"]
        ):

            number = item.get(
                "номерЗанятия",
                "?"
            )

            start = item.get(
                "начало",
                ""
            )

            end = item.get(
                "конец",
                ""
            )

            subject = item.get(
                "дисциплина",
                "Без названия"
            )

            teacher = item.get(
                "преподаватель",
                "-"
            )

            room = item.get(
                "аудитория",
                "-"
            )


            text += (
                f"{number}️⃣ "
                f"{start}-{end}\n"
                f"📘 {subject}\n"
                f"👤 {teacher}\n"
                f"🏫 {room}\n\n"
                "────────────\n\n"
            )


    return text