{"id":42999,"date":"2025-07-29T17:26:37","date_gmt":"2025-07-29T08:26:37","guid":{"rendered":"https:\/\/techgym.jp\/?p=42999"},"modified":"2025-07-29T17:26:41","modified_gmt":"2025-07-29T08:26:41","slug":"python-insert","status":"publish","type":"post","link":"https:\/\/techgym.jp\/column\/python-insert\/","title":{"rendered":"Python insert()\u30e1\u30bd\u30c3\u30c9\u5b8c\u5168\u30ac\u30a4\u30c9 &#8211; \u30ea\u30b9\u30c8\u64cd\u4f5c\u306e\u57fa\u790e\u304b\u3089\u5fdc\u7528\u307e\u3067"},"content":{"rendered":"\n<p>\u00a0<\/p>\n<p>Python\u306e\u30ea\u30b9\u30c8\u64cd\u4f5c\u306b\u304a\u3044\u3066\u3001\u7279\u5b9a\u306e\u4f4d\u7f6e\u306b\u8981\u7d20\u3092\u633f\u5165\u3057\u305f\u3044\u5834\u9762\u306f\u983b\u7e41\u306b\u767a\u751f\u3057\u307e\u3059\u3002\u305d\u3093\u306a\u6642\u306b\u6d3b\u7528\u3059\u308b\u306e\u304c<code>insert()<\/code>\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001<code>insert()<\/code>\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u304b\u3089\u5fdc\u7528\u30c6\u30af\u30cb\u30c3\u30af\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u8003\u616e\u70b9\u307e\u3067\u3001\u5b9f\u8df5\u7684\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3068\u3068\u3082\u306b\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<h2>insert()\u30e1\u30bd\u30c3\u30c9\u3068\u306f<\/h2>\n<p><code>insert()<\/code>\u30e1\u30bd\u30c3\u30c9\u306f\u3001Python\u306e\u30ea\u30b9\u30c8\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u7d44\u307f\u8fbc\u307e\u308c\u3066\u3044\u308b\u30e1\u30bd\u30c3\u30c9\u3067\u3001\u6307\u5b9a\u3057\u305f\u4f4d\u7f6e\u306b\u8981\u7d20\u3092\u633f\u5165\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002\u65e2\u5b58\u306e\u8981\u7d20\u306f\u633f\u5165\u4f4d\u7f6e\u4ee5\u964d\u306b\u5f8c\u308d\u306b\u30b7\u30d5\u30c8\u3055\u308c\u3001\u30ea\u30b9\u30c8\u306e\u9577\u3055\u304c1\u3064\u5897\u52a0\u3057\u307e\u3059\u3002<\/p>\n<h3>\u57fa\u672c\u69cb\u6587<\/h3>\n<pre><code class=\"language-python\">list.insert(index, element)\n<\/code><\/pre>\n<ul>\n<li><code>index<\/code>: \u633f\u5165\u3059\u308b\u4f4d\u7f6e\uff080\u304b\u3089\u59cb\u307e\u308b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\uff09<\/li>\n<li><code>element<\/code>: \u633f\u5165\u3059\u308b\u8981\u7d20<\/li>\n<\/ul>\n<h2>\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h2>\n<h3>1. \u57fa\u672c\u7684\u306a\u8981\u7d20\u306e\u633f\u5165<\/h3>\n<pre><code class=\"language-python\">fruits = ['apple', 'banana', 'cherry']\nfruits.insert(1, 'orange')\nprint(fruits)  # ['apple', 'orange', 'banana', 'cherry']\n<\/code><\/pre>\n<h3>2. \u30ea\u30b9\u30c8\u306e\u5148\u982d\u306b\u633f\u5165<\/h3>\n<pre><code class=\"language-python\">numbers = [2, 3, 4]\nnumbers.insert(0, 1)\nprint(numbers)  # [1, 2, 3, 4]\n<\/code><\/pre>\n<h3>3. \u30ea\u30b9\u30c8\u306e\u672b\u5c3e\u306b\u633f\u5165<\/h3>\n<pre><code class=\"language-python\">colors = ['red', 'green']\ncolors.insert(len(colors), 'blue')\nprint(colors)  # ['red', 'green', 'blue']\n<\/code><\/pre>\n<h3>4. \u8ca0\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f7f\u7528<\/h3>\n<pre><code class=\"language-python\">animals = ['cat', 'dog', 'bird']\nanimals.insert(-1, 'fish')\nprint(animals)  # ['cat', 'dog', 'fish', 'bird']\n<\/code><\/pre>\n<h2>\u3055\u307e\u3056\u307e\u306a\u30c7\u30fc\u30bf\u578b\u306e\u633f\u5165<\/h2>\n<h3>\u6587\u5b57\u5217\u306e\u633f\u5165<\/h3>\n<pre><code class=\"language-python\">words = ['hello', 'world']\nwords.insert(1, 'beautiful')\nprint(words)  # ['hello', 'beautiful', 'world']\n<\/code><\/pre>\n<h3>\u6570\u5024\u306e\u633f\u5165<\/h3>\n<pre><code class=\"language-python\">scores = [85, 92, 78]\nscores.insert(2, 90)\nprint(scores)  # [85, 92, 90, 78]\n<\/code><\/pre>\n<h3>\u30ea\u30b9\u30c8\u306e\u633f\u5165\uff08\u30cd\u30b9\u30c8\u3057\u305f\u30ea\u30b9\u30c8\uff09<\/h3>\n<pre><code class=\"language-python\">matrix = [[1, 2], [5, 6]]\nmatrix.insert(1, [3, 4])\nprint(matrix)  # [[1, 2], [3, 4], [5, 6]]\n<\/code><\/pre>\n<h3>\u8f9e\u66f8\u306e\u633f\u5165<\/h3>\n<pre><code class=\"language-python\">data = [{'name': 'Alice'}, {'name': 'Charlie'}]\ndata.insert(1, {'name': 'Bob'})\nprint(data)  # [{'name': 'Alice'}, {'name': 'Bob'}, {'name': 'Charlie'}]\n<\/code><\/pre>\n<h2>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u8a73\u7d30\u306a\u52d5\u4f5c<\/h2>\n<h3>\u7bc4\u56f2\u5916\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u6307\u5b9a<\/h3>\n<pre><code class=\"language-python\">items = ['a', 'b', 'c']\nitems.insert(10, 'z')  # \u672b\u5c3e\u306b\u8ffd\u52a0\u3055\u308c\u308b\nprint(items)  # ['a', 'b', 'c', 'z']\n<\/code><\/pre>\n<pre><code class=\"language-python\">items = ['a', 'b', 'c']\nitems.insert(-10, 'x')  # \u5148\u982d\u306b\u8ffd\u52a0\u3055\u308c\u308b\nprint(items)  # ['x', 'a', 'b', 'c']\n<\/code><\/pre>\n<h3>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u8a08\u7b97<\/h3>\n<pre><code class=\"language-python\">data = [10, 20, 30, 40, 50]\nmiddle = len(data) \/\/ 2\ndata.insert(middle, 25)\nprint(data)  # [10, 20, 25, 30, 40, 50]\n<\/code><\/pre>\n<h2>\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u4f8b<\/h2>\n<h3>1. \u30bd\u30fc\u30c8\u6e08\u307f\u30ea\u30b9\u30c8\u3078\u306e\u633f\u5165<\/h3>\n<pre><code class=\"language-python\">import bisect\n\nsorted_list = [1, 3, 5, 7, 9]\nnew_value = 6\npos = bisect.bisect_left(sorted_list, new_value)\nsorted_list.insert(pos, new_value)\nprint(sorted_list)  # [1, 3, 5, 6, 7, 9]\n<\/code><\/pre>\n<h3>2. \u6761\u4ef6\u306b\u57fa\u3065\u304f\u633f\u5165<\/h3>\n<pre><code class=\"language-python\">students = ['Alice', 'Charlie', 'Eve']\nnew_student = 'Bob'\n# \u30a2\u30eb\u30d5\u30a1\u30d9\u30c3\u30c8\u9806\u306b\u633f\u5165\nfor i, name in enumerate(students):\n    if new_student &lt; name:\n        students.insert(i, new_student)\n        break\nelse:\n    students.append(new_student)\nprint(students)  # ['Alice', 'Bob', 'Charlie', 'Eve']\n<\/code><\/pre>\n<h3>3. \u8907\u6570\u8981\u7d20\u306e\u4e00\u62ec\u633f\u5165<\/h3>\n<pre><code class=\"language-python\">original = [1, 2, 5, 6]\nto_insert = [3, 4]\nposition = 2\nfor i, item in enumerate(to_insert):\n    original.insert(position + i, item)\nprint(original)  # [1, 2, 3, 4, 5, 6]\n<\/code><\/pre>\n<h3>4. CSV\u30c7\u30fc\u30bf\u306e\u64cd\u4f5c<\/h3>\n<pre><code class=\"language-python\">csv_row = ['John', '25', 'Engineer']\ncsv_row.insert(1, 'Doe')  # \u59d3\u3092\u8ffd\u52a0\nprint(csv_row)  # ['John', 'Doe', '25', 'Engineer']\n<\/code><\/pre>\n<h2>insert()\u3068\u4ed6\u306e\u30e1\u30bd\u30c3\u30c9\u3068\u306e\u6bd4\u8f03<\/h2>\n<h3>append()\u3068\u306e\u9055\u3044<\/h3>\n<pre><code class=\"language-python\"># append()\u306f\u672b\u5c3e\u306b\u306e\u307f\u8ffd\u52a0\nlist1 = [1, 2, 3]\nlist1.append(4)\nprint(list1)  # [1, 2, 3, 4]\n\n# insert()\u306f\u4efb\u610f\u306e\u4f4d\u7f6e\u306b\u8ffd\u52a0\nlist2 = [1, 2, 3]\nlist2.insert(1, 4)\nprint(list2)  # [1, 4, 2, 3]\n<\/code><\/pre>\n<h3>extend()\u3068\u306e\u9055\u3044<\/h3>\n<pre><code class=\"language-python\"># extend()\u306f\u8907\u6570\u8981\u7d20\u3092\u672b\u5c3e\u306b\u8ffd\u52a0\nlist1 = [1, 2]\nlist1.extend([3, 4])\nprint(list1)  # [1, 2, 3, 4]\n\n# insert()\u306f\u5358\u4e00\u8981\u7d20\u3092\u6307\u5b9a\u4f4d\u7f6e\u306b\u8ffd\u52a0\nlist2 = [1, 2]\nlist2.insert(1, [3, 4])  # \u30ea\u30b9\u30c8\u81ea\u4f53\u304c1\u3064\u306e\u8981\u7d20\u3068\u3057\u3066\u633f\u5165\nprint(list2)  # [1, [3, 4], 2]\n<\/code><\/pre>\n<h3>\u30b9\u30e9\u30a4\u30b9\u3092\u4f7f\u3063\u305f\u633f\u5165\u3068\u306e\u6bd4\u8f03<\/h3>\n<pre><code class=\"language-python\"># insert()\u3092\u4f7f\u7528\nlist1 = [1, 2, 4, 5]\nlist1.insert(2, 3)\nprint(list1)  # [1, 2, 3, 4, 5]\n\n# \u30b9\u30e9\u30a4\u30b9\u3092\u4f7f\u7528\uff08\u8907\u6570\u8981\u7d20\u306e\u633f\u5165\u304c\u53ef\u80fd\uff09\nlist2 = [1, 2, 5, 6]\nlist2[2:2] = [3, 4]\nprint(list2)  # [1, 2, 3, 4, 5, 6]\n<\/code><\/pre>\n<h2>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u8003\u616e\u70b9<\/h2>\n<h3>\u6642\u9593\u8a08\u7b97\u91cf<\/h3>\n<pre><code class=\"language-python\">import time\n\n# \u5927\u304d\u306a\u30ea\u30b9\u30c8\u3067\u306e\u5148\u982d\u633f\u5165\uff08O(n)\uff09\nlarge_list = list(range(100000))\nstart = time.time()\nlarge_list.insert(0, -1)\nprint(f\"\u5148\u982d\u633f\u5165\u6642\u9593: {time.time() - start:.6f}\u79d2\")\n\n# \u672b\u5c3e\u633f\u5165\uff08append\u76f8\u5f53\u3001O(1)\uff09\nstart = time.time()\nlarge_list.insert(len(large_list), 999999)\nprint(f\"\u672b\u5c3e\u633f\u5165\u6642\u9593: {time.time() - start:.6f}\u79d2\")\n<\/code><\/pre>\n<h3>\u30e1\u30e2\u30ea\u52b9\u7387\u7684\u306a\u4ee3\u66ff\u624b\u6cd5<\/h3>\n<pre><code class=\"language-python\">from collections import deque\n\n# deque\u3092\u4f7f\u3063\u305f\u52b9\u7387\u7684\u306a\u5148\u982d\u633f\u5165\nd = deque([1, 2, 3])\nd.appendleft(0)  # O(1)\nprint(list(d))  # [0, 1, 2, 3]\n<\/code><\/pre>\n<h2>\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0<\/h2>\n<h3>\u4e00\u822c\u7684\u306a\u30a8\u30e9\u30fc\u3068\u5bfe\u51e6\u6cd5<\/h3>\n<pre><code class=\"language-python\"># TypeError: \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u6570\u5024\u3067\u306a\u3044\u5834\u5408\nmy_list = [1, 2, 3]\ntry:\n    my_list.insert('1', 4)  # \u30a8\u30e9\u30fc\nexcept TypeError as e:\n    print(f\"\u30a8\u30e9\u30fc: {e}\")\n    my_list.insert(1, 4)  # \u6b63\u3057\u3044\u65b9\u6cd5\n<\/code><\/pre>\n<h3>\u5b89\u5168\u306a\u633f\u5165\u306e\u5b9f\u88c5<\/h3>\n<pre><code class=\"language-python\">def safe_insert(lst, index, element):\n    \"\"\"\u5b89\u5168\u306b\u30ea\u30b9\u30c8\u306b\u8981\u7d20\u3092\u633f\u5165\u3059\u308b\u95a2\u6570\"\"\"\n    try:\n        if not isinstance(index, int):\n            raise TypeError(\"\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u6574\u6570\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\")\n        lst.insert(index, element)\n        return True\n    except Exception as e:\n        print(f\"\u633f\u5165\u30a8\u30e9\u30fc: {e}\")\n        return False\n\nresult = safe_insert([1, 2, 3], 1, 'inserted')\nprint(result)  # True\n<\/code><\/pre>\n<h2>\u9ad8\u5ea6\u306a\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n<h3>1. \u52d5\u7684\u306a\u4f4d\u7f6e\u8a08\u7b97<\/h3>\n<pre><code class=\"language-python\">def insert_sorted(lst, value):\n    \"\"\"\u30bd\u30fc\u30c8\u6e08\u307f\u30ea\u30b9\u30c8\u306b\u5024\u3092\u9069\u5207\u306a\u4f4d\u7f6e\u306b\u633f\u5165\"\"\"\n    for i, item in enumerate(lst):\n        if value &lt; item:\n            lst.insert(i, value)\n            return\n    lst.append(value)\n\nsorted_nums = [1, 3, 5, 7]\ninsert_sorted(sorted_nums, 4)\nprint(sorted_nums)  # [1, 3, 4, 5, 7]\n<\/code><\/pre>\n<h3>2. \u6761\u4ef6\u306b\u57fa\u3065\u304f\u8907\u6570\u633f\u5165<\/h3>\n<pre><code class=\"language-python\">def insert_multiple(lst, items, condition_func):\n    \"\"\"\u6761\u4ef6\u95a2\u6570\u306b\u57fa\u3065\u3044\u3066\u8907\u6570\u8981\u7d20\u3092\u633f\u5165\"\"\"\n    offset = 0\n    for i, item in enumerate(items):\n        pos = condition_func(lst, item) + offset\n        lst.insert(pos, item)\n        offset += 1\n\ndef find_position(lst, item):\n    \"\"\"\u30a2\u30eb\u30d5\u30a1\u30d9\u30c3\u30c8\u9806\u306e\u4f4d\u7f6e\u3092\u898b\u3064\u3051\u308b\"\"\"\n    for i, existing in enumerate(lst):\n        if item &lt; existing:\n            return i\n    return len(lst)\n\nnames = ['Alice', 'Charlie']\nnew_names = ['Bob', 'David']\ninsert_multiple(names, new_names, find_position)\nprint(names)  # ['Alice', 'Bob', 'Charlie', 'David']\n<\/code><\/pre>\n<h3>3. \u30c7\u30fc\u30bf\u69cb\u9020\u306e\u5909\u63db<\/h3>\n<pre><code class=\"language-python\">def list_to_tree_insert(flat_list, tree_list, depth=0):\n    \"\"\"\u30d5\u30e9\u30c3\u30c8\u306a\u30ea\u30b9\u30c8\u3092\u968e\u5c64\u69cb\u9020\u306b\u5909\u63db\"\"\"\n    if depth &lt; len(flat_list):\n        tree_list.insert(0, [])\n        tree_list[0].append(flat_list[depth])\n        list_to_tree_insert(flat_list, tree_list[0], depth + 1)\n\nflat = [1, 2, 3]\ntree = []\nlist_to_tree_insert(flat, tree)\nprint(tree)  # [[[3], 2], 1]\n<\/code><\/pre>\n<h2>\u30c7\u30fc\u30bf\u30b5\u30a4\u30a8\u30f3\u30b9\u3067\u306e\u6d3b\u7528<\/h2>\n<h3>\u6642\u7cfb\u5217\u30c7\u30fc\u30bf\u306e\u633f\u5165<\/h3>\n<pre><code class=\"language-python\">import datetime\n\ntimestamps = ['2023-01-01', '2023-01-03', '2023-01-05']\nvalues = [100, 120, 110]\n\n# \u65b0\u3057\u3044\u30c7\u30fc\u30bf\u30dd\u30a4\u30f3\u30c8\u3092\u9069\u5207\u306a\u4f4d\u7f6e\u306b\u633f\u5165\nnew_date = '2023-01-02'\nnew_value = 105\n\nfor i, date in enumerate(timestamps):\n    if new_date &lt; date:\n        timestamps.insert(i, new_date)\n        values.insert(i, new_value)\n        break\n\nprint(f\"\u65e5\u4ed8: {timestamps}\")\nprint(f\"\u5024: {values}\")\n<\/code><\/pre>\n<h3>\u30c7\u30fc\u30bf\u30d5\u30ec\u30fc\u30e0\u98a8\u306e\u64cd\u4f5c<\/h3>\n<pre><code class=\"language-python\">def insert_row(data, index, row):\n    \"\"\"2\u6b21\u5143\u30ea\u30b9\u30c8\u306b\u884c\u3092\u633f\u5165\"\"\"\n    for i, column in enumerate(data):\n        column.insert(index, row[i])\n\n# \u5217\u6307\u5411\u306e\u30c7\u30fc\u30bf\nnames = ['Alice', 'Charlie']\nages = [25, 30]\ncities = ['Tokyo', 'Osaka']\n\ndata = [names, ages, cities]\nnew_row = ['Bob', 27, 'Kyoto']\n\ninsert_row(data, 1, new_row)\nprint(f\"\u540d\u524d: {data[0]}\")  # ['Alice', 'Bob', 'Charlie']\nprint(f\"\u5e74\u9f62: {data[1]}\")  # [25, 27, 30]\nprint(f\"\u90fd\u5e02: {data[2]}\")  # ['Tokyo', 'Kyoto', 'Osaka']\n<\/code><\/pre>\n<h2>\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n<h3>1. \u9069\u5207\u306a\u5834\u9762\u3067\u306e\u4f7f\u7528<\/h3>\n<pre><code class=\"language-python\"># \u826f\u3044\u4f8b: \u5c11\u6570\u306e\u8981\u7d20\u3092\u6301\u3064\u30ea\u30b9\u30c8\u3067\u306e\u4f7f\u7528\nsmall_list = [1, 2, 3]\nsmall_list.insert(1, 1.5)\n\n# \u907f\u3051\u308b\u3079\u304d\u4f8b: \u5927\u304d\u306a\u30ea\u30b9\u30c8\u306e\u5148\u982d\u3078\u306e\u983b\u7e41\u306a\u633f\u5165\n# large_list = list(range(100000))\n# large_list.insert(0, new_item)  # \u9045\u3044\n\n# \u4ee3\u66ff\u6848: deque\u3092\u4f7f\u7528\nfrom collections import deque\nlarge_deque = deque(range(100000))\nlarge_deque.appendleft(new_item)  # \u9ad8\u901f\n<\/code><\/pre>\n<h3>2. \u53ef\u8aad\u6027\u3092\u91cd\u8996\u3057\u305f\u30b3\u30fc\u30c9<\/h3>\n<pre><code class=\"language-python\">def insert_at_beginning(lst, item):\n    \"\"\"\u30ea\u30b9\u30c8\u306e\u5148\u982d\u306b\u8981\u7d20\u3092\u633f\u5165\"\"\"\n    lst.insert(0, item)\n\ndef insert_at_end(lst, item):\n    \"\"\"\u30ea\u30b9\u30c8\u306e\u672b\u5c3e\u306b\u8981\u7d20\u3092\u633f\u5165\"\"\"\n    lst.insert(len(lst), item)\n\n# \u307e\u305f\u306f lst.append(item) \u3092\u4f7f\u7528\n<\/code><\/pre>\n<h3>3. \u30a8\u30e9\u30fc\u51e6\u7406\u3092\u542b\u3080\u5b9f\u88c5<\/h3>\n<pre><code class=\"language-python\">def robust_insert(lst, index, element):\n    \"\"\"\u5805\u7262\u306a\u633f\u5165\u95a2\u6570\"\"\"\n    if not isinstance(lst, list):\n        raise TypeError(\"\u7b2c1\u5f15\u6570\u306f\u30ea\u30b9\u30c8\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\")\n    \n    if not isinstance(index, int):\n        raise TypeError(\"\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u6574\u6570\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\")\n    \n    # \u7bc4\u56f2\u30c1\u30a7\u30c3\u30af\uff08\u5fc5\u8981\u306b\u5fdc\u3058\u3066\uff09\n    if index &lt; 0:\n        index = max(0, len(lst) + index + 1)\n    elif index &gt; len(lst):\n        index = len(lst)\n    \n    lst.insert(index, element)\n    return lst\n\nresult = robust_insert([1, 2, 3], 1, 'inserted')\nprint(result)  # [1, 'inserted', 2, 3]\n<\/code><\/pre>\n<h2>\u3088\u304f\u3042\u308b\u9593\u9055\u3044\u3068\u5bfe\u51e6\u6cd5<\/h2>\n<h3>1. \u623b\u308a\u5024\u306e\u8aa4\u89e3<\/h3>\n<pre><code class=\"language-python\"># \u9593\u9055\u3044: insert()\u306f\u623b\u308a\u5024\u304cNone\nnumbers = [1, 2, 3]\nresult = numbers.insert(1, 1.5)  # None\u304c\u8fd4\u3055\u308c\u308b\nprint(result)  # None\n\n# \u6b63\u3057\u3044\u65b9\u6cd5\nnumbers = [1, 2, 3]\nnumbers.insert(1, 1.5)\nprint(numbers)  # [1, 1.5, 2, 3]\n<\/code><\/pre>\n<h3>2. \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u7406\u89e3\u4e0d\u8db3<\/h3>\n<pre><code class=\"language-python\"># \u9593\u9055\u3063\u305f\u7406\u89e3\nlst = ['a', 'b', 'c']\nlst.insert(-1, 'x')  # \u6700\u5f8c\u304b\u30892\u756a\u76ee\u306b\u633f\u5165\u3055\u308c\u308b\nprint(lst)  # ['a', 'b', 'x', 'c']\n\n# \u672b\u5c3e\u306b\u633f\u5165\u3057\u305f\u3044\u5834\u5408\nlst = ['a', 'b', 'c']\nlst.insert(len(lst), 'x')  # \u307e\u305f\u306f lst.append('x')\nprint(lst)  # ['a', 'b', 'c', 'x']\n<\/code><\/pre>\n<h3>3. \u30eb\u30fc\u30d7\u4e2d\u3067\u306e\u4f7f\u7528<\/h3>\n<pre><code class=\"language-python\"># \u5371\u967a\u306a\u4f8b: \u30eb\u30fc\u30d7\u4e2d\u3067\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u64cd\u4f5c\nnumbers = [1, 3, 5, 7, 9]\n# \u3059\u3079\u3066\u306e\u5947\u6570\u306e\u524d\u306b0\u3092\u633f\u5165\u3057\u305f\u3044\uff08\u9593\u9055\u3063\u305f\u65b9\u6cd5\uff09\n\n# \u6b63\u3057\u3044\u65b9\u6cd5: \u9006\u9806\u3067\u30eb\u30fc\u30d7\nfor i in range(len(numbers) - 1, -1, -1):\n    if numbers[i] % 2 == 1:\n        numbers.insert(i, 0)\nprint(numbers)  # [0, 1, 0, 3, 0, 5, 0, 7, 0, 9]\n<\/code><\/pre>\n<h2>\u307e\u3068\u3081<\/h2>\n<p><code>insert()<\/code>\u30e1\u30bd\u30c3\u30c9\u306f\u3001Python\u30ea\u30b9\u30c8\u306e\u7279\u5b9a\u4f4d\u7f6e\u306b\u8981\u7d20\u3092\u633f\u5165\u3059\u308b\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3067\u3059\u3002\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u304b\u3089\u9ad8\u5ea6\u306a\u5fdc\u7528\u307e\u3067\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u64cd\u4f5c\u306e\u5e45\u304c\u5927\u304d\u304f\u5e83\u304c\u308a\u307e\u3059\u3002<\/p>\n<p>\u4e3b\u306a\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n<ul>\n<li><strong>\u57fa\u672c\u69cb\u6587<\/strong>: <code>list.insert(index, element)<\/code><\/li>\n<li><strong>\u67d4\u8edf\u306a\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u6307\u5b9a<\/strong>: \u6b63\u306e\u5024\u3001\u8ca0\u306e\u5024\u3001\u7bc4\u56f2\u5916\u306e\u5024\u306b\u3082\u5bfe\u5fdc<\/li>\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9<\/strong>: \u5927\u304d\u306a\u30ea\u30b9\u30c8\u306e\u5148\u982d\u633f\u5165\u306f\u907f\u3051\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066<code>deque<\/code>\u3092\u4f7f\u7528<\/li>\n<li><strong>\u30a8\u30e9\u30fc\u51e6\u7406<\/strong>: \u578b\u30c1\u30a7\u30c3\u30af\u3068\u4f8b\u5916\u51e6\u7406\u3092\u9069\u5207\u306b\u5b9f\u88c5<\/li>\n<li><strong>\u5b9f\u8df5\u7684\u6d3b\u7528<\/strong>: \u30bd\u30fc\u30c8\u30c7\u30fc\u30bf\u3001\u6642\u7cfb\u5217\u30c7\u30fc\u30bf\u3001\u968e\u5c64\u69cb\u9020\u306e\u64cd\u4f5c\u306b\u6d3b\u7528<\/li>\n<\/ul>\n<p><code>insert()<\/code>\u30e1\u30bd\u30c3\u30c9\u3092\u9069\u5207\u306b\u4f7f\u3044\u3053\u306a\u3057\u3066\u3001\u52b9\u7387\u7684\u306aPython\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u4f5c\u6210\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3>\u53c2\u8003\u30ea\u30f3\u30af<\/h3>\n<ul>\n<li><a href=\"https:\/\/docs.python.org\/3\/tutorial\/datastructures.html\">Python\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8 &#8211; \u30ea\u30b9\u30c8\u578b<\/a><\/li>\n<li><a href=\"https:\/\/docs.python.org\/3\/library\/collections.html#collections.deque\">Python\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8 &#8211; collections.deque<\/a><\/li>\n<li><a href=\"https:\/\/docs.python.org\/3\/library\/bisect.html\">Python\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8 &#8211; bisect<\/a><\/li>\n<\/ul>\n\n\n\n<p>\u25a0\u30d7\u30ed\u30f3\u30d7\u30c8\u3060\u3051\u3067\u30aa\u30ea\u30b8\u30ca\u30eb\u30a2\u30d7\u30ea\u3092\u958b\u767a\u30fb\u516c\u958b\u3057\u3066\u307f\u305f\uff01\uff01<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"yqvWWYUJ5m\"><a href=\"https:\/\/techgym.jp\/column\/ori-app\/\">\u30d7\u30ed\u30f3\u30d7\u30c8\u3060\u3051\u3067\u30aa\u30ea\u30b8\u30ca\u30eb\u30a2\u30d7\u30ea\u3092\u958b\u767a\u30fb\u516c\u958b\u3057\u3066\u307f\u305f\uff01\uff01<\/a><\/blockquote><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;\u30d7\u30ed\u30f3\u30d7\u30c8\u3060\u3051\u3067\u30aa\u30ea\u30b8\u30ca\u30eb\u30a2\u30d7\u30ea\u3092\u958b\u767a\u30fb\u516c\u958b\u3057\u3066\u307f\u305f\uff01\uff01&#8221; &#8212; \u3010\u30c6\u30c3\u30af\u30b8\u30e0\u3011\u683c\u5b89\u30fb\u5bfe\u9762\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\" src=\"https:\/\/techgym.jp\/column\/ori-app\/embed\/#?secret=EhOVonVa6C#?secret=yqvWWYUJ5m\" data-secret=\"yqvWWYUJ5m\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>\u25a0AI\u6642\u4ee3\u306e\u7b2c\u4e00\u6b69\uff01\u300cAI\u99c6\u52d5\u958b\u767a\u30b3\u30fc\u30b9\u300d\u306f\u3058\u3081\u307e\u3057\u305f\uff01<\/p>\n\n\n\n<p>\u30c6\u30c3\u30af\u30b8\u30e0\u6771\u4eac\u672c\u6821\u3067\u5148\u884c\u958b\u59cb\u3002<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"iLQ0vqfIhv\"><a href=\"https:\/\/techgym.jp\/about\/ai-driven-development\/\">AI\u6642\u4ee3\u306e\u7b2c\u4e00\u6b69\uff01\u300cAI\u99c6\u52d5\u958b\u767a\u30b3\u30fc\u30b9\u300d\uff08\u521d\u5fc3\u8005\u5411\u3051\uff09<\/a><\/blockquote><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;AI\u6642\u4ee3\u306e\u7b2c\u4e00\u6b69\uff01\u300cAI\u99c6\u52d5\u958b\u767a\u30b3\u30fc\u30b9\u300d\uff08\u521d\u5fc3\u8005\u5411\u3051\uff09&#8221; &#8212; \u3010\u30c6\u30c3\u30af\u30b8\u30e0\u3011\u683c\u5b89\u30fb\u5bfe\u9762\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\" src=\"https:\/\/techgym.jp\/about\/ai-driven-development\/embed\/#?secret=kL7XVH6Or8#?secret=iLQ0vqfIhv\" data-secret=\"iLQ0vqfIhv\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>\u25a0\u30c6\u30c3\u30af\u30b8\u30e0\u6771\u4eac\u672c\u6821<\/p>\n\n\n\n<p>\u300c\u6b66\u7530\u587e\u300d\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u7248\u3068\u3044\u3048\u3070\u300c\u30c6\u30c3\u30af\u30b8\u30e0\u300d\u3002<br>\u8b1b\u7fa9\u52d5\u753b\u306a\u3057\u3001\u6559\u79d1\u66f8\u306a\u3057\u3002\u300c\u9032\u6357\u7ba1\u7406\u3068\u30b3\u30fc\u30c1\u30f3\u30b0\u300d\u3067\u52b9\u7387\u5b66\u7fd2\u3002<br>\u3088\u308a\u65e9\u304f\u3001\u3088\u308a\u5b89\u304f\u3001\u3057\u304b\u3082\u5bfe\u9762\u578b\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\u3067\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"97tUjMI6VO\"><a href=\"https:\/\/techgym.jp\/tokyo\/tokyo_honko\/\">\u30c6\u30c3\u30af\u30b8\u30e0\u6771\u4eac\u672c\u6821<\/a><\/blockquote><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;\u30c6\u30c3\u30af\u30b8\u30e0\u6771\u4eac\u672c\u6821&#8221; &#8212; \u3010\u30c6\u30c3\u30af\u30b8\u30e0\u3011\u683c\u5b89\u30fb\u5bfe\u9762\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\" src=\"https:\/\/techgym.jp\/tokyo\/tokyo_honko\/embed\/#?secret=KJwZUHy3i9#?secret=97tUjMI6VO\" data-secret=\"97tUjMI6VO\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>\uff1c\u77ed\u671f\u8b1b\u7fd2\uff1e5\u65e5\u30675\u4e07\u5186\u306e\u300cPython\u30df\u30cb\u30ad\u30e3\u30f3\u30d7\u300d\u958b\u50ac\u4e2d\u3002<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"W0a8DmINXw\"><a href=\"https:\/\/techgym.jp\/event\/nagatacho_camp\/\">\u72ec\u5b66\u3082\u30aa\u30f3\u30e9\u30a4\u30f3\u3082\u7121\u7406\u3060\u304b\u3089\u3001\u6709\u7d66\u3068\u3063\u3066\u300cPython\u30df\u30cb\u30ad\u30e3\u30f3\u30d7\u300d\u3078\u30105\u65e5\u9593\u30675\u4e07\u5186\u3011<\/a><\/blockquote><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;\u72ec\u5b66\u3082\u30aa\u30f3\u30e9\u30a4\u30f3\u3082\u7121\u7406\u3060\u304b\u3089\u3001\u6709\u7d66\u3068\u3063\u3066\u300cPython\u30df\u30cb\u30ad\u30e3\u30f3\u30d7\u300d\u3078\u30105\u65e5\u9593\u30675\u4e07\u5186\u3011&#8221; &#8212; \u3010\u30c6\u30c3\u30af\u30b8\u30e0\u3011\u683c\u5b89\u30fb\u5bfe\u9762\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\" src=\"https:\/\/techgym.jp\/event\/nagatacho_camp\/embed\/#?secret=UVOn6ecaMW#?secret=W0a8DmINXw\" data-secret=\"W0a8DmINXw\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>\uff1c\u67081\u958b\u50ac\uff1e\u653e\u9001\u4f5c\u5bb6\u306b\u3088\u308b\u6620\u50cf\u30c7\u30a3\u30ec\u30af\u30bf\u30fc\u990a\u6210\u8b1b\u5ea7<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"OpYQBmaoap\"><a href=\"https:\/\/techgym.jp\/event\/video_director\/\">\u73fe\u5f79\u653e\u9001\u4f5c\u5bb6\u304c\u6559\u3048\u308b\u52d5\u753b\u8b1b\u5ea7\uff01\u300e\uff24\uff2f\uff27\uff21\u300f<\/a><\/blockquote><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;\u73fe\u5f79\u653e\u9001\u4f5c\u5bb6\u304c\u6559\u3048\u308b\u52d5\u753b\u8b1b\u5ea7\uff01\u300e\uff24\uff2f\uff27\uff21\u300f&#8221; &#8212; \u3010\u30c6\u30c3\u30af\u30b8\u30e0\u3011\u683c\u5b89\u30fb\u5bfe\u9762\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\" src=\"https:\/\/techgym.jp\/event\/video_director\/embed\/#?secret=hIrP3sszS1#?secret=OpYQBmaoap\" data-secret=\"OpYQBmaoap\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>\uff1c\u30aa\u30f3\u30e9\u30a4\u30f3\u7121\u6599\uff1e\u30bc\u30ed\u304b\u3089\u59cb\u3081\u308bPython\u7206\u901f\u8b1b\u5ea7<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"rE2TOyxfkj\"><a href=\"https:\/\/techgym.jp\/tokyo_python\/\">\u30bc\u30ed\u304b\u3089\u59cb\u3081\u308bPython\u7206\u901f\u8b1b\u5ea7\uff08\u7406\u7cfb\u30fb\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u521d\u5fc3\u8005\u5411\u3051\uff09<\/a><\/blockquote><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;\u30bc\u30ed\u304b\u3089\u59cb\u3081\u308bPython\u7206\u901f\u8b1b\u5ea7\uff08\u7406\u7cfb\u30fb\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u521d\u5fc3\u8005\u5411\u3051\uff09&#8221; &#8212; \u3010\u30c6\u30c3\u30af\u30b8\u30e0\u3011\u683c\u5b89\u30fb\u5bfe\u9762\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\" src=\"https:\/\/techgym.jp\/tokyo_python\/embed\/#?secret=c59zbro22a#?secret=rE2TOyxfkj\" data-secret=\"rE2TOyxfkj\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>\u00a0 Python\u306e\u30ea\u30b9\u30c8\u64cd\u4f5c\u306b\u304a\u3044\u3066\u3001\u7279\u5b9a\u306e\u4f4d\u7f6e\u306b\u8981\u7d20\u3092\u633f\u5165\u3057\u305f\u3044\u5834\u9762\u306f\u983b\u7e41\u306b\u767a\u751f\u3057\u307e\u3059\u3002\u305d\u3093\u306a\u6642\u306b\u6d3b\u7528\u3059\u308b\u306e\u304cinsert()\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001insert()\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u304b\u3089\u5fdc\u7528\u30c6\u30af\u30cb\u30c3\u30af\u3001\u30d1\u30d5 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":42501,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[5],"tags":[],"class_list":["post-42999","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-column"],"views":49,"jetpack_featured_media_url":"\/wp-content\/uploads\/2025\/07\/f3403acf5c65aedec0dba821c4c26404.png","jetpack_sharing_enabled":true,"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/techgym.jp\/wp-json\/wp\/v2\/posts\/42999","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/techgym.jp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/techgym.jp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/techgym.jp\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/techgym.jp\/wp-json\/wp\/v2\/comments?post=42999"}],"version-history":[{"count":0,"href":"https:\/\/techgym.jp\/wp-json\/wp\/v2\/posts\/42999\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/techgym.jp\/wp-json\/wp\/v2\/media\/42501"}],"wp:attachment":[{"href":"https:\/\/techgym.jp\/wp-json\/wp\/v2\/media?parent=42999"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/techgym.jp\/wp-json\/wp\/v2\/categories?post=42999"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/techgym.jp\/wp-json\/wp\/v2\/tags?post=42999"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}