{
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  {
   "cell_type": "markdown",
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   "metadata": {},
   "source": [
    "# 14-03 · Методы\n",
    "\n",
    "Практика к разделу [«Управляем объектами. Объекты выполняют действия»](../../site/chapters/glava-14/14-03-upravlyaem-obektami.html)."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "7102590d",
   "metadata": {},
   "source": [
    "## Цель\n",
    "\n",
    "Изменять атрибуты и определять методы."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "c6bc51c7",
   "metadata": {},
   "source": [
    "## Рабочий пример"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "7235f8cc",
   "metadata": {
    "execution": {
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     "iopub.status.busy": "2026-08-17T19:47:46.584004Z",
     "iopub.status.idle": "2026-08-17T19:47:46.602024Z",
     "shell.execute_reply": "2026-08-17T19:47:46.600854Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Рекс говорит: Гав-гав!\n",
      "Теперь Рекс исполнилось 4!\n"
     ]
    }
   ],
   "source": [
    "class Sobaka:\n",
    "    def __init__(self, klichka, vozrast):\n",
    "        self.klichka = klichka\n",
    "        self.vozrast = vozrast\n",
    "\n",
    "    def layat(self):\n",
    "        print(f\"{self.klichka} говорит: Гав-гав!\")\n",
    "\n",
    "    def prazdnovat_den_rozhdeniya(self):\n",
    "        self.vozrast += 1\n",
    "        print(f\"Теперь {self.klichka} исполнилось {self.vozrast}!\")\n",
    "\n",
    "rex = Sobaka(\"Рекс\", 3)\n",
    "rex.layat()\n",
    "rex.prazdnovat_den_rozhdeniya()"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "782e4ef8",
   "metadata": {},
   "source": [
    "## Задание ★ Базовая практика\n",
    "\n",
    "Добавьте классу `Kniga` метод `opisanie()`, возвращающий строку вида «Название — Автор»."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "edaa3bfb",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-08-17T19:47:46.603786Z",
     "iopub.status.busy": "2026-08-17T19:47:46.603626Z",
     "iopub.status.idle": "2026-08-17T19:47:46.606994Z",
     "shell.execute_reply": "2026-08-17T19:47:46.606329Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Война и мир — Толстой\n"
     ]
    }
   ],
   "source": [
    "class Kniga:\n",
    "    def __init__(self, nazvanie, avtor):\n",
    "        self.nazvanie = nazvanie\n",
    "        self.avtor = avtor\n",
    "\n",
    "    def opisanie(self):\n",
    "        return f\"{self.nazvanie} — {self.avtor}\"\n",
    "\n",
    "k = Kniga(\"Война и мир\", \"Толстой\")\n",
    "print(k.opisanie())"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "73913350",
   "metadata": {},
   "source": [
    "## Дополнительная задача ★★★\n",
    "\n",
    "Добавьте класс `Biblioteka`, который хранит список книг и умеет добавлять новую книгу методом `dobavit_knigu()`."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "51cab8d1",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-08-17T19:47:46.608463Z",
     "iopub.status.busy": "2026-08-17T19:47:46.608338Z",
     "iopub.status.idle": "2026-08-17T19:47:46.611470Z",
     "shell.execute_reply": "2026-08-17T19:47:46.610958Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Война и мир — Толстой\n",
      "Мастер и Маргарита — Булгаков\n"
     ]
    }
   ],
   "source": [
    "class Biblioteka:\n",
    "    def __init__(self):\n",
    "        self.knigi = []\n",
    "\n",
    "    def dobavit_knigu(self, kniga):\n",
    "        self.knigi.append(kniga)\n",
    "\n",
    "    def pokazat_vse(self):\n",
    "        for k in self.knigi:\n",
    "            print(k.opisanie())\n",
    "\n",
    "biblioteka = Biblioteka()\n",
    "biblioteka.dobavit_knigu(Kniga(\"Война и мир\", \"Толстой\"))\n",
    "biblioteka.dobavit_knigu(Kniga(\"Мастер и Маргарита\", \"Булгаков\"))\n",
    "biblioteka.pokazat_vse()"
   ]
  }
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