{
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   "source": [
    "# 19-27 · GameState z dataclass\n",
    "\n",
    "Praktyka do sekcji [„GameState z dataclass”"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "3c61dec4",
   "metadata": {},
   "source": [
    "## Cel\n",
    "\n",
    "Twórz, porównuj i aktualizuj GameState jak zwykły dataclass."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "9ba4bac1",
   "metadata": {},
   "source": [
    "## Sprawa robocza"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "692c4a6d",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-09-03T00:54:25.037715Z",
     "iopub.status.busy": "2026-09-03T00:54:25.037552Z",
     "iopub.status.idle": "2026-09-03T00:54:25.067813Z",
     "shell.execute_reply": "2026-09-03T00:54:25.066750Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "GameState(snake=[(0, 0)], score=0, high_score=0, status='ready')\n",
      "GameState(snake=[(0, 0)], score=10, high_score=0, status='ready')\n"
     ]
    }
   ],
   "source": [
    "from dataclasses import dataclass, field, replace\n",
    "\n",
    "@dataclass\n",
    "class GameState:\n",
    "    snake: list = field(default_factory=lambda: [(0, 0)])\n",
    "    score: int = 0\n",
    "    high_score: int = 0\n",
    "    status: str = \"ready\"\n",
    "\n",
    "state = GameState(snake=[(0, 0)])\n",
    "print(state)\n",
    "state2 = replace(state, score=10)\n",
    "print(state2)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "cddee01b",
   "metadata": {},
   "source": [
    "## Podstawowa praktyka zadań ★"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "b2aad98d",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-09-03T00:54:25.069158Z",
     "iopub.status.busy": "2026-09-03T00:54:25.069021Z",
     "iopub.status.idle": "2026-09-03T00:54:25.072212Z",
     "shell.execute_reply": "2026-09-03T00:54:25.071667Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "GameState ведёт себя как обычные данные — сравнение и replace() работают предсказуемо.\n"
     ]
    }
   ],
   "source": [
    "a = GameState(snake=[(0, 0)], score=10)\n",
    "b = GameState(snake=[(0, 0)], score=10)\n",
    "assert a == b   # dataclass сравнивается по значениям полей\n",
    "\n",
    "c = replace(a, status=\"running\")\n",
    "assert c.status == \"running\"\n",
    "assert c.score == 10   # остальные поля не изменились\n",
    "assert a.status == \"ready\"   # replace() не мутирует исходный объект\n",
    "print(\"GameState ведёт себя как обычные данные — сравнение и replace() работают предсказуемо.\")"
   ]
  }
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