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  {
   "cell_type": "markdown",
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   "source": [
    "# 15-29 · Мини-проект — таблица рекордов\n",
    "\n",
    "Практика к разделу [«Мини-проект: таблица рекордов»](../../site/chapters/glava-15/15-29-mini-proekt-rekordy-i-nastrojki.html)."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "17e63142",
   "metadata": {},
   "source": [
    "## Рабочий пример"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "b8d17a1b",
   "metadata": {
    "execution": {
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     "iopub.status.idle": "2026-08-18T15:53:10.823819Z",
     "shell.execute_reply": "2026-08-18T15:53:10.823415Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[{'name': 'Bob', 'score': 1500}, {'name': 'Carlos', 'score': 1200}]\n"
     ]
    }
   ],
   "source": [
    "import csv\n",
    "from pathlib import Path\n",
    "\n",
    "def load_rekordy(path):\n",
    "    if not path.exists():\n",
    "        return []\n",
    "    with path.open(\"r\", encoding=\"utf-8\", newline=\"\") as f:\n",
    "        reader = csv.DictReader(f)\n",
    "        return [{\"name\": row[\"name\"], \"score\": int(row[\"score\"])} for row in reader]\n",
    "\n",
    "def save_rekordy(path, rekordy):\n",
    "    with path.open(\"w\", encoding=\"utf-8\", newline=\"\") as f:\n",
    "        writer = csv.DictWriter(f, fieldnames=[\"name\", \"score\"])\n",
    "        writer.writeheader()\n",
    "        writer.writerows(rekordy)\n",
    "\n",
    "def top_n(rekordy, n):\n",
    "    return sorted(rekordy, key=lambda r: r[\"score\"], reverse=True)[:n]\n",
    "\n",
    "path = Path(\"rekordy3.csv\")\n",
    "path.unlink(missing_ok=True)   # для повторяемости примера при повторном запуске\n",
    "rekordy = load_rekordy(path)\n",
    "rekordy.append({\"name\": \"Anna\", \"score\": 800})\n",
    "rekordy.append({\"name\": \"Bob\", \"score\": 1500})\n",
    "rekordy.append({\"name\": \"Carlos\", \"score\": 1200})\n",
    "save_rekordy(path, rekordy)\n",
    "\n",
    "top2 = top_n(load_rekordy(path), 2)\n",
    "print(top2)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "579ca110",
   "metadata": {},
   "source": [
    "## Задание ★★★ Задача повышенной сложности\n",
    "\n",
    "Добавьте функцию, которая обновляет рекорд существующего игрока вместо добавления второй строки с тем же именем."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "1065ab81",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-08-18T15:53:10.824979Z",
     "iopub.status.busy": "2026-08-18T15:53:10.824811Z",
     "iopub.status.idle": "2026-08-18T15:53:10.827667Z",
     "shell.execute_reply": "2026-08-18T15:53:10.827221Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "2000\n"
     ]
    }
   ],
   "source": [
    "def add_or_update(rekordy, name, score):\n",
    "    for zapis in rekordy:\n",
    "        if zapis[\"name\"] == name:\n",
    "            zapis[\"score\"] = max(zapis[\"score\"], score)\n",
    "            return rekordy\n",
    "    rekordy.append({\"name\": name, \"score\": score})\n",
    "    return rekordy\n",
    "\n",
    "obnovlennye = add_or_update(list(rekordy), \"Anna\", 2000)\n",
    "anna_score = next(z[\"score\"] for z in obnovlennye if z[\"name\"] == \"Anna\")\n",
    "print(anna_score)"
   ]
  }
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