homework/dmedvedev/python/18.algo_tranf_date.ipynb

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    "Задача 1. Сумма оплаченных заказов\n",
    "Дан список заказов:\n",
    "\n",
    "orders= [\n",
    "    {\"order_id\":1,\"amount\":1200,\"status\":\"paid\"},\n",
    "    {\"order_id\":2,\"amount\":500,\"status\":\"new\"},\n",
    "    {\"order_id\":3,\"amount\":800,\"status\":\"paid\"},\n",
    "    {\"order_id\":4,\"amount\":300,\"status\":\"cancelled\"}\n",
    "]\n",
    "Нужно:\n",
    "    пройтись по заказам;\n",
    "    взять только те, у которых статус \"paid\";\n",
    "    посчитать их общую сумму;\n",
    "    вывести результат."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 31,
   "id": "5dac0cd0",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "2\n"
     ]
    }
   ],
   "source": [
    "orders= [\n",
    "    {\"order_id\":1,\"amount\":1200,\"status\":\"paid\"},\n",
    "    {\"order_id\":2,\"amount\":500,\"status\":\"new\"},\n",
    "    {\"order_id\":3,\"amount\":800,\"status\":\"paid\"},\n",
    "    {\"order_id\":4,\"amount\":300,\"status\":\"cancelled\"}\n",
    "]\n",
    "count = 0\n",
    "for order in orders:\n",
    "    if order[\"status\"] == \"paid\":\n",
    "        count += 1\n",
    "print(count)\n"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "5909293c",
   "metadata": {},
   "source": [
    "Задача 2. Поиск самого дорогого заказа\n",
    "Дан список заказов:\n",
    "\n",
    "orders= [\n",
    "    {\"order_id\":1,\"amount\":1200},\n",
    "    {\"order_id\":2,\"amount\":500},\n",
    "    {\"order_id\":3,\"amount\":1800},\n",
    "    {\"order_id\":4,\"amount\":900}\n",
    "]\n",
    "Нужно:\n",
    "    найти заказ с максимальной суммой amount;\n",
    "    вывести весь словарь этого заказа."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 37,
   "id": "1cd30f37",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{'order_id': 3, 'amount': 1800}\n"
     ]
    }
   ],
   "source": [
    "orders = [\n",
    "    {\"order_id\":1,\"amount\":1200},\n",
    "    {\"order_id\":2,\"amount\":500},\n",
    "    {\"order_id\":3,\"amount\":1800},\n",
    "    {\"order_id\":4,\"amount\":900}\n",
    "]\n",
    "max_order = orders[0]\n",
    "for order in orders:\n",
    "    if order[\"amount\"] > max_order[\"amount\"]:\n",
    "        max_order = order\n",
    "pprint(max_order, sort_dicts=False)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "c81986e6",
   "metadata": {},
   "source": [
    "Задача 3. Группировка заказов по пользователю\n",
    "Дан список заказов:\n",
    "\n",
    "orders= [\n",
    "    {\"order_id\":1,\"user_id\":101,\"amount\":1200},\n",
    "    {\"order_id\":2,\"user_id\":102,\"amount\":500},\n",
    "    {\"order_id\":3,\"user_id\":101,\"amount\":800},\n",
    "    {\"order_id\":4,\"user_id\":103,\"amount\":700}\n",
    "]\n",
    "Нужно:\n",
    "    сгруппировать заказы по user_id;\n",
    "    в результате получить словарь, где:\n",
    "    ключ — это user_id,\n",
    "    значение — список заказов этого пользователя."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 46,
   "id": "cd85b1b0",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{101: [{'order_id': 1, 'user_id': 101, 'amount': 1200},\n",
      "       {'order_id': 3, 'user_id': 101, 'amount': 800}],\n",
      " 102: [{'order_id': 2, 'user_id': 102, 'amount': 500}],\n",
      " 103: [{'order_id': 4, 'user_id': 103, 'amount': 700}]}\n"
     ]
    }
   ],
   "source": [
    "orders= [\n",
    "    {\"order_id\":1,\"user_id\":101,\"amount\":1200},\n",
    "    {\"order_id\":2,\"user_id\":102,\"amount\":500},\n",
    "    {\"order_id\":3,\"user_id\":101,\"amount\":800},\n",
    "    {\"order_id\":4,\"user_id\":103,\"amount\":700}\n",
    "]\n",
    "grouped = {}\n",
    "for order in orders:\n",
    "    user_id = order[\"user_id\"]\n",
    "    if user_id not in grouped:\n",
    "        grouped[user_id] = []\n",
    "    grouped[user_id].append(order)\n",
    "pprint(grouped, sort_dicts=False)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "a0669a7b",
   "metadata": {},
   "source": [
    "Задача 4. Подсчет выручки по пользователям\n",
    "Дан список заказов:\n",
    "\n",
    "orders= [\n",
    "    {\"order_id\":1,\"user_id\":101,\"amount\":1200},\n",
    "    {\"order_id\":2,\"user_id\":102,\"amount\":500},\n",
    "    {\"order_id\":3,\"user_id\":101,\"amount\":800},\n",
    "    {\"order_id\":4,\"user_id\":103,\"amount\":700},\n",
    "    {\"order_id\":5,\"user_id\":102,\"amount\":300}\n",
    "]\n",
    "Нужно:\n",
    "    пройтись по заказам;\n",
    "    посчитать общую сумму amount по каждому user_id;\n",
    "    сохранить результат в словарь."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 54,
   "id": "3f0a2d12",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{101: 2000, 102: 800, 103: 700}\n"
     ]
    }
   ],
   "source": [
    "orders= [\n",
    "    {\"order_id\":1,\"user_id\":101,\"amount\":1200},\n",
    "    {\"order_id\":2,\"user_id\":102,\"amount\":500},\n",
    "    {\"order_id\":3,\"user_id\":101,\"amount\":800},\n",
    "    {\"order_id\":4,\"user_id\":103,\"amount\":700},\n",
    "    {\"order_id\":5,\"user_id\":102,\"amount\":300}\n",
    "]\n",
    "user_total = {}\n",
    "for order in orders:\n",
    "    user_id = order[\"user_id\"]\n",
    "    if user_id not in user_total:\n",
    "        user_total[user_id] = 0\n",
    "    user_total[user_id] += order[\"amount\"]\n",
    "print(user_total)"
   ]
  }
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