{"id":43414,"date":"2025-07-31T08:06:07","date_gmt":"2025-07-30T23:06:07","guid":{"rendered":"https:\/\/techgym.jp\/?p=43414"},"modified":"2025-07-31T08:06:09","modified_gmt":"2025-07-30T23:06:09","slug":"python-items","status":"publish","type":"post","link":"https:\/\/techgym.jp\/column\/python-items\/","title":{"rendered":"Python items()\u30e1\u30bd\u30c3\u30c9\u5b8c\u5168\u30ac\u30a4\u30c9 – \u8f9e\u66f8\u306e\u8981\u7d20\u3092\u52b9\u7387\u7684\u306b\u51e6\u7406\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"\n

\u00a0<\/p>\n

Python\u306eitems()<\/code>\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u8f9e\u66f8\u306e\u30ad\u30fc\u3068\u5024\u306e\u30da\u30a2\u3092\u52b9\u7387\u7684\u306b\u51e6\u7406\u3059\u308b\u305f\u3081\u306e\u5fc5\u9808\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001items()<\/code>\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u304b\u3089\u5fdc\u7528\u30c6\u30af\u30cb\u30c3\u30af\u307e\u3067\u3001\u5b9f\u7528\u7684\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3068\u3068\u3082\u306b\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n

\u76ee\u6b21<\/h2>\n
    \n
  1. items()\u30e1\u30bd\u30c3\u30c9\u3068\u306f<\/a><\/li>\n
  2. \u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/a><\/li>\n
  3. for\u30eb\u30fc\u30d7\u3067\u306e\u6d3b\u7528<\/a><\/li>\n
  4. \u5fdc\u7528\u7684\u306a\u4f7f\u7528\u4f8b<\/a><\/li>\n
  5. \u4ed6\u306e\u30e1\u30bd\u30c3\u30c9\u3068\u306e\u6bd4\u8f03<\/a><\/li>\n
  6. \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u6700\u9069\u5316<\/a><\/li>\n
  7. \u5b9f\u8df5\u7684\u306a\u6d3b\u7528\u4f8b<\/a><\/li>\n
  8. \u307e\u3068\u3081<\/a><\/li>\n<\/ol>\n

    items()\u30e1\u30bd\u30c3\u30c9\u3068\u306f<\/h2>\n

    items()<\/code>\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u8f9e\u66f8\u306e\u3059\u3079\u3066\u306e\u30ad\u30fc\u3068\u5024\u306e\u30da\u30a2\u3092\u8fd4\u3059Python\u306e\u7d44\u307f\u8fbc\u307f\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002\u623b\u308a\u5024\u306fdict_items<\/code>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u3001\u5404\u8981\u7d20\u306f\u30bf\u30d7\u30eb\u5f62\u5f0f(key, value)<\/code>\u3067\u8868\u73fe\u3055\u308c\u307e\u3059\u3002<\/p>\n

    # \u57fa\u672c\u7684\u306a\u4f8b\nuser = {\"name\": \"\u7530\u4e2d\", \"age\": 30, \"city\": \"\u6771\u4eac\"}\nitems = user.items()\nprint(items)  # dict_items([('name', '\u7530\u4e2d'), ('age', 30), ('city', '\u6771\u4eac')])\n<\/code><\/pre>\n
    \u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h2>\n
    dict_items\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u7406\u89e3<\/h3>\n
    # items()\u306e\u623b\u308a\u5024\u3092\u78ba\u8a8d\ndata = {\"a\": 1, \"b\": 2, \"c\": 3}\nitems = data.items()\nprint(type(items))  # <class 'dict_items'>\nprint(list(items))  # [('a', 1), ('b', 2), ('c', 3)]\n<\/code><\/pre>\n
    \u30ea\u30b9\u30c8\u3078\u306e\u5909\u63db<\/h3>\n
    # \u30ea\u30b9\u30c8\u306b\u5909\u63db\u3057\u3066\u64cd\u4f5c\nuser = {\"name\": \"\u4f50\u85e4\", \"age\": 25}\nitems_list = list(user.items())\nprint(items_list[0])  # ('name', '\u4f50\u85e4')\n<\/code><\/pre>\n
    for\u30eb\u30fc\u30d7\u3067\u306e\u6d3b\u7528<\/h2>\n
    \u57fa\u672c\u7684\u306a\u30eb\u30fc\u30d7\u51e6\u7406<\/h3>\n
    # \u30ad\u30fc\u3068\u5024\u3092\u540c\u6642\u306b\u53d6\u5f97\nscores = {\"\u6570\u5b66\": 85, \"\u82f1\u8a9e\": 92, \"\u56fd\u8a9e\": 78}\nfor subject, score in scores.items():\n    print(f\"{subject}: {score}\u70b9\")\n<\/code><\/pre>\n
    \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u4ed8\u304d\u30eb\u30fc\u30d7<\/h3>\n
    # enumerate()\u3068\u7d44\u307f\u5408\u308f\u305b\ndata = {\"apple\": 100, \"banana\": 80, \"orange\": 120}\nfor i, (fruit, price) in enumerate(data.items()):\n    print(f\"{i+1}. {fruit}: {price}\u5186\")\n<\/code><\/pre>\n
    \u6761\u4ef6\u4ed8\u304d\u30eb\u30fc\u30d7<\/h3>\n
    # \u6761\u4ef6\u3092\u6e80\u305f\u3059\u8981\u7d20\u306e\u307f\u51e6\u7406\nproducts = {\"laptop\": 80000, \"mouse\": 2000, \"keyboard\": 5000}\nfor name, price in products.items():\n    if price > 3000:\n        print(f\"{name}: {price}\u5186\uff08\u9ad8\u984d\u5546\u54c1\uff09\")\n<\/code><\/pre>\n
    \u5fdc\u7528\u7684\u306a\u4f7f\u7528\u4f8b<\/h2>\n
    \u8f9e\u66f8\u306e\u7d50\u5408<\/h3>\n
    # \u8907\u6570\u306e\u8f9e\u66f8\u3092\u7d50\u5408\ndict1 = {\"a\": 1, \"b\": 2}\ndict2 = {\"c\": 3, \"d\": 4}\nmerged = dict(list(dict1.items()) + list(dict2.items()))\nprint(merged)  # {'a': 1, 'b': 2, 'c': 3, 'd': 4}\n<\/code><\/pre>\n
    \u30ad\u30fc\u3068\u5024\u306e\u5165\u308c\u66ff\u3048<\/h3>\n
    # \u8f9e\u66f8\u306e\u30ad\u30fc\u3068\u5024\u3092\u5165\u308c\u66ff\u3048\noriginal = {\"apple\": \"\u308a\u3093\u3054\", \"banana\": \"\u30d0\u30ca\u30ca\"}\nreversed_dict = {v: k for k, v in original.items()}\nprint(reversed_dict)  # {'\u308a\u3093\u3054': 'apple', '\u30d0\u30ca\u30ca': 'banana'}\n<\/code><\/pre>\n
    \u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0<\/h3>\n
    # \u6761\u4ef6\u306b\u5408\u3046\u8981\u7d20\u306e\u307f\u3067\u65b0\u3057\u3044\u8f9e\u66f8\u3092\u4f5c\u6210\nscores = {\"\u7530\u4e2d\": 85, \"\u4f50\u85e4\": 92, \"\u9234\u6728\": 78, \"\u9ad8\u6a4b\": 95}\nhigh_scores = {name: score for name, score in scores.items() if score >= 90}\nprint(high_scores)  # {'\u4f50\u85e4': 92, '\u9ad8\u6a4b': 95}\n<\/code><\/pre>\n
    \u4ed6\u306e\u30e1\u30bd\u30c3\u30c9\u3068\u306e\u6bd4\u8f03<\/h2>\n
    keys()\u3001values()\u3068\u306e\u9055\u3044<\/h3>\n
    data = {\"x\": 10, \"y\": 20, \"z\": 30}\n\n# \u305d\u308c\u305e\u308c\u306e\u623b\u308a\u5024\u3092\u6bd4\u8f03\nprint(data.keys())    # dict_keys(['x', 'y', 'z'])\nprint(data.values())  # dict_values([10, 20, 30])\nprint(data.items())   # dict_items([('x', 10), ('y', 20), ('z', 30)])\n<\/code><\/pre>\n
    \u5f93\u6765\u306e\u65b9\u6cd5\u3068\u306e\u6bd4\u8f03<\/h3>\n
    # \u5f93\u6765\u306e\u30eb\u30fc\u30d7\u65b9\u6cd5\uff08\u975e\u63a8\u5968\uff09\ndata = {\"a\": 1, \"b\": 2}\nfor key in data.keys():\n    value = data[key]\n    print(f\"{key}: {value}\")\n\n# items()\u3092\u4f7f\u3063\u305f\u52b9\u7387\u7684\u306a\u65b9\u6cd5\nfor key, value in data.items():\n    print(f\"{key}: {value}\")\n<\/code><\/pre>\n
    \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u6700\u9069\u5316<\/h2>\n
    \u30e1\u30e2\u30ea\u52b9\u7387<\/h3>\n
    # items()\u306f\u30d3\u30e5\u30fc\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8fd4\u3059\u305f\u3081\u52b9\u7387\u7684\nlarge_dict = {f\"key{i}\": i for i in range(1000)}\nitems_view = large_dict.items()  # \u30e1\u30e2\u30ea\u52b9\u7387\u304c\u826f\u3044\nitems_list = list(large_dict.items())  # \u30e1\u30e2\u30ea\u3092\u591a\u304f\u4f7f\u7528\n<\/code><\/pre>\n
    \u8f9e\u66f8\u306e\u52d5\u7684\u5909\u66f4\u3068\u306e\u95a2\u4fc2<\/h3>\n
    # \u5143\u306e\u8f9e\u66f8\u304c\u5909\u66f4\u3055\u308c\u308b\u3068items\u3082\u5909\u66f4\u3055\u308c\u308b\ndata = {\"a\": 1, \"b\": 2}\nitems = data.items()\nprint(list(items))  # [('a', 1), ('b', 2)]\n\ndata[\"c\"] = 3\nprint(list(items))  # [('a', 1), ('b', 2), ('c', 3)]\n<\/code><\/pre>\n
    \u5b9f\u8df5\u7684\u306a\u6d3b\u7528\u4f8b<\/h2>\n
    JSON\u30c7\u30fc\u30bf\u306e\u51e6\u7406<\/h3>\n
    # JSON\u98a8\u30c7\u30fc\u30bf\u306e\u51e6\u7406\nuser_data = {\n    \"profile\": {\"name\": \"\u5c71\u7530\", \"age\": 28},\n    \"settings\": {\"theme\": \"dark\", \"lang\": \"ja\"}\n}\n\nfor section, config in user_data.items():\n    print(f\"[{section}]\")\n    for key, value in config.items():\n        print(f\"  {key}: {value}\")\n<\/code><\/pre>\n
    \u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306e\u691c\u8a3c<\/h3>\n
    # \u8a2d\u5b9a\u5024\u306e\u691c\u8a3c\nconfig = {\"host\": \"localhost\", \"port\": 8080, \"debug\": True}\nrequired_keys = {\"host\", \"port\"}\n\nmissing_keys = []\nfor key, value in config.items():\n    if key in required_keys and not value:\n        missing_keys.append(key)\n\nif not missing_keys:\n    print(\"\u8a2d\u5b9a\u306f\u6b63\u5e38\u3067\u3059\")\n<\/code><\/pre>\n
    \u30c7\u30fc\u30bf\u306e\u96c6\u8a08<\/h3>\n
    # \u30ab\u30c6\u30b4\u30ea\u5225\u306e\u96c6\u8a08\nsales = {\"2024-01\": 100000, \"2024-02\": 120000, \"2024-03\": 110000}\ntotal = sum(amount for month, amount in sales.items())\nprint(f\"\u7dcf\u58f2\u4e0a: {total:,}\u5186\")\n<\/code><\/pre>\n
    \u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u6587\u5b57\u5217\u306e\u7f6e\u63db<\/h3>\n
    # \u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u306e\u5024\u7f6e\u63db\ntemplate = \"\u3053\u3093\u306b\u3061\u306f\u3001{name}\u3055\u3093\u3002\u5e74\u9f62\u306f{age}\u6b73\u3067\u3059\u306d\u3002\"\ndata = {\"name\": \"\u7530\u4e2d\", \"age\": 30}\nresult = template.format(**dict(data.items()))\nprint(result)  # \u3053\u3093\u306b\u3061\u306f\u3001\u7530\u4e2d\u3055\u3093\u3002\u5e74\u9f62\u306f30\u6b73\u3067\u3059\u306d\u3002\n<\/code><\/pre>\n
    \u30bd\u30fc\u30c8\u51e6\u7406\u3068\u306e\u7d44\u307f\u5408\u308f\u305b<\/h2>\n
    \u30ad\u30fc\u3067\u30bd\u30fc\u30c8<\/h3>\n
    # \u30ad\u30fc\u3067\u30bd\u30fc\u30c8\u3057\u3066\u51e6\u7406\ndata = {\"zebra\": 1, \"apple\": 2, \"banana\": 3}\nfor key, value in sorted(data.items()):\n    print(f\"{key}: {value}\")\n<\/code><\/pre>\n
    \u5024\u3067\u30bd\u30fc\u30c8<\/h3>\n
    # \u5024\u3067\u30bd\u30fc\u30c8\u3057\u3066\u51e6\u7406\nscores = {\"Alice\": 85, \"Bob\": 92, \"Charlie\": 78}\nfor name, score in sorted(scores.items(), key=lambda x: x[1], reverse=True):\n    print(f\"{name}: {score}\u70b9\")\n<\/code><\/pre>\n
    \u30a8\u30e9\u30fc\u51e6\u7406\u3068\u6ce8\u610f\u70b9<\/h2>\n
    \u8f9e\u66f8\u5909\u66f4\u6642\u306e\u6ce8\u610f<\/h3>\n
    # \u30eb\u30fc\u30d7\u4e2d\u306e\u8f9e\u66f8\u5909\u66f4\u306f\u907f\u3051\u308b\ndata = {\"a\": 1, \"b\": 2, \"c\": 3}\n# \u4ee5\u4e0b\u306f\u63a8\u5968\u3055\u308c\u306a\u3044\n# for key, value in data.items():\n#     if value > 1:\n#         del data[key]  # RuntimeError\n\n# \u5b89\u5168\u306a\u65b9\u6cd5\nto_delete = [k for k, v in data.items() if v > 1]\nfor key in to_delete:\n    del data[key]\n<\/code><\/pre>\n
    \u578b\u30c1\u30a7\u30c3\u30af<\/h3>\n
    # \u5b89\u5168\u306a\u51e6\u7406\u306e\u305f\u3081\u306e\u578b\u30c1\u30a7\u30c3\u30af\ndef process_dict_items(data):\n    if not isinstance(data, dict):\n        return \"\u8f9e\u66f8\u3067\u306f\u3042\u308a\u307e\u305b\u3093\"\n    \n    results = []\n    for key, value in data.items():\n        results.append(f\"{key}={value}\")\n    return \", \".join(results)\n\nprint(process_dict_items({\"a\": 1, \"b\": 2}))  # a=1, b=2\n<\/code><\/pre>\n
    \u307e\u3068\u3081<\/h2>\n
    Python\u306eitems()<\/code>\u30e1\u30bd\u30c3\u30c9\u306f\u8f9e\u66f8\u64cd\u4f5c\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u91cd\u8981\u306a\u6a5f\u80fd\u3067\u3059\u3002<\/p>\n
    \u4e3b\u306a\u5229\u70b9:<\/strong><\/p>\n