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   "source": [
    "# 17-19 · GameState с dataclass\n",
    "\n",
    "Практика к разделу [«GameState с dataclass»](../../site/chapters/glava-17/17-19-gamestate-dataclass.html)."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "224d3474",
   "metadata": {},
   "source": [
    "## Цель\n",
    "\n",
    "Собрать GameState как @dataclass и проверить, что board НЕ расшаривается между экземплярами."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "d39064b1",
   "metadata": {},
   "source": [
    "## Рабочий пример"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "d1b961c8",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-09-03T10:13:03.511549Z",
     "iopub.status.busy": "2026-09-03T10:13:03.511387Z",
     "iopub.status.idle": "2026-09-03T10:13:03.539045Z",
     "shell.execute_reply": "2026-09-03T10:13:03.538526Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "GameState(board=['', '', '', '', '', '', '', '', ''], current_player='X', game_over=False, winner=None, winning_line=None, score_x=0, score_o=0, draws=0)\n"
     ]
    }
   ],
   "source": [
    "from dataclasses import dataclass, field\n",
    "\n",
    "@dataclass\n",
    "class GameState:\n",
    "    board: list[str] = field(default_factory=lambda: [\"\"] * 9)\n",
    "    current_player: str = \"X\"\n",
    "    game_over: bool = False\n",
    "    winner: str | None = None\n",
    "    winning_line: tuple[int, int, int] | None = None\n",
    "    score_x: int = 0\n",
    "    score_o: int = 0\n",
    "    draws: int = 0\n",
    "\n",
    "s1 = GameState()\n",
    "s2 = GameState()\n",
    "print(s1)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "bb9a8a3f",
   "metadata": {},
   "source": [
    "## Задание ★★ Самостоятельная задача — независимость экземпляров"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "86c2f94e",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-09-03T10:13:03.540472Z",
     "iopub.status.busy": "2026-09-03T10:13:03.540298Z",
     "iopub.status.idle": "2026-09-03T10:13:03.543308Z",
     "shell.execute_reply": "2026-09-03T10:13:03.542795Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "s1 и s2 — полностью независимые экземпляры GameState.\n"
     ]
    }
   ],
   "source": [
    "s1.board[0] = \"X\"\n",
    "\n",
    "assert s1.board[0] == \"X\"\n",
    "assert s2.board[0] == \"\", \"изменение board у s1 НЕ должно быть видно в s2 (field(default_factory=...))\"\n",
    "assert s1.current_player == \"X\" and s2.current_player == \"X\"\n",
    "print(\"s1 и s2 — полностью независимые экземпляры GameState.\")"
   ]
  }
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