{"id":807,"date":"2024-05-26T21:05:09","date_gmt":"2024-05-26T12:05:09","guid":{"rendered":"https:\/\/chocottopro.com\/?p=807"},"modified":"2024-06-02T13:49:33","modified_gmt":"2024-06-02T04:49:33","slug":"%e3%80%90%e5%ae%8c%e5%85%a8%e7%89%88%e3%80%91%e5%9b%b3%e8%a7%a3%e3%81%a8%e3%82%b3%e3%83%bc%e3%83%89%e4%be%8b%e3%81%a7%e5%ad%a6%e3%81%b6pandas-concat%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%ef%bc%81","status":"publish","type":"post","link":"https:\/\/chocottopro.com\/?p=807","title":{"rendered":"\u3010\u5b8c\u5168\u7248\u3011\u56f3\u89e3\u3068\u30b3\u30fc\u30c9\u4f8b\u3067\u5b66\u3076pandas concat\u306e\u4f7f\u3044\u65b9\uff01\u30c7\u30fc\u30bf\u7d50\u5408\u3092\u52b9\u7387\u5316\u3059\u308b\u30c6\u30af\u30cb\u30c3\u30af5\u9078"},"content":{"rendered":"\n<p>pandas\u306e\u30c7\u30fc\u30bf\u7d50\u5408\u3067\u60a9\u3093\u3067\u3044\u307e\u305b\u3093\u304b\uff1fconcat\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9\u304c\u308f\u304b\u3089\u306a\u3044\u3001\u30c7\u30fc\u30bf\u7d50\u5408\u306e\u52b9\u7387\u304c\u60aa\u3044\u306a\u3069\u306e\u554f\u984c\u3092\u62b1\u3048\u3066\u3044\u308b\u65b9\u3082\u591a\u3044\u306e\u3067\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u304b\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001\u521d\u5fc3\u8005\u304b\u3089\u4e2d\u7d1a\u8005\u307e\u3067\u5fc5\u898b\u306e\u3001pandas concat\u306e\u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u3067\u3092\u56f3\u89e3\u3068\u30b3\u30fc\u30c9\u4f8b\u3067\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002\u30c7\u30fc\u30bf\u7d50\u5408\u306e\u30b9\u30ad\u30eb\u3092\u5411\u4e0a\u3055\u305b\u3001\u30c7\u30fc\u30bf\u5206\u6790\u306e\u751f\u7523\u6027\u3092\u9ad8\u3081\u307e\u3057\u3087\u3046\uff01<\/p>\n\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u3053\u306e\u8a18\u4e8b\u3092\u8aad\u3093\u3060\u3089\u308f\u304b\u308b\u3053\u3068<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\">\n<li>concat\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9 <\/li>\n\n\n\n<li>DataFrame\u306e\u884c\u65b9\u5411\u30fb\u5217\u65b9\u5411\u306e\u7d50\u5408\u65b9\u6cd5 <\/li>\n\n\n\n<li>\u30de\u30eb\u30c1\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u6301\u3064DataFrame\u306e\u7d50\u5408 <\/li>\n\n\n\n<li>\u30c7\u30fc\u30bf\u7d50\u5408\u3092\u52b9\u7387\u5316\u3059\u308b\u5fdc\u7528\u30c6\u30af\u30cb\u30c3\u30af <\/li>\n\n\n\n<li>concat\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3044\u3053\u306a\u3059\u305f\u3081\u306eTips <\/li>\n\n\n\n<li>pandas\u306e\u30c7\u30fc\u30bf\u7d50\u5408\u30b9\u30ad\u30eb\u5411\u4e0a\u306e\u305f\u3081\u306e\u5b66\u7fd2\u30ac\u30a4\u30c9<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<div class=\"toc\"><br \/>\n<b>Warning<\/b>:  Undefined array key \"is_admin\" in <b>\/home\/c7479301\/public_html\/chocottopro.com\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>116<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_category_top\" in <b>\/home\/c7479301\/public_html\/chocottopro.com\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>121<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_top\" in <b>\/home\/c7479301\/public_html\/chocottopro.com\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>128<\/b><br \/>\n    <div id=\"toc_container\" class=\"sgb-toc--bullets js-smooth-scroll\" data-dialog-title=\"Table of Contents\">\n      <p class=\"toc_title\">\u76ee\u6b21 <\/p>\n      <ul class=\"toc_list\">  <li class=\"first\">    <a href=\"#i-0\">pandas concat\u3068\u306f\uff1f\u30c7\u30fc\u30bf\u7d50\u5408\u306e\u57fa\u672c\u3092\u89e3\u8aac<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">pandas\u306b\u304a\u3051\u308b\u30c7\u30fc\u30bf\u7d50\u5408\u306e\u7a2e\u985e\u3068\u4f7f\u3044\u5206\u3051<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-2\">concat\u30e1\u30bd\u30c3\u30c9\u306e\u7279\u5fb4\u3068\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-3\">pandas concat\u306e\u4f7f\u7528\u4f8b\uff1a\u30b3\u30fc\u30c9\u4f8b\u3067\u5b66\u307c\u3046<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-4\">DataFrame\u306e\u884c\u65b9\u5411\u306e\u7d50\u5408<\/a>      <\/li>      <li>        <a href=\"#i-5\">DataFrame\u306e\u5217\u65b9\u5411\u306e\u7d50\u5408<\/a>      <\/li>      <li>        <a href=\"#i-6\">\u8ef8(axis)\u3092\u6307\u5b9a\u3057\u305f\u7d50\u5408<\/a>      <\/li>      <li>        <a href=\"#i-7\">\u7570\u306a\u308b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u6301\u3064DataFrame\u306e\u7d50\u5408<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-8\">\u30de\u30eb\u30c1\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u6301\u3064DataFrame\u306e\u7d50\u5408<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-9\">pandas concat\u5fdc\u7528\u30c6\u30af\u30cb\u30c3\u30af\uff1a\u30c7\u30fc\u30bf\u7d50\u5408\u3092\u52b9\u7387\u5316\u3057\u3088\u3046<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-10\">\u30ad\u30fc(key)\u3092\u6307\u5b9a\u3057\u3066\u8907\u6570\u306eDataFrame\u3092\u7d50\u5408\u3059\u308b<\/a>      <\/li>      <li>        <a href=\"#i-11\">\u7d50\u5408\u3059\u308bDataFrame\u306e\u5f62\u72b6\u3092\u63c3\u3048\u308b<\/a>      <\/li>      <li>        <a href=\"#i-12\">\u7d50\u5408\u6642\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u51e6\u7406\u3092\u5de5\u592b\u3059\u308b<\/a>      <\/li>      <li>        <a href=\"#i-13\">\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u3092\u5206\u5272\u3057\u3066\u7d50\u5408\u3059\u308b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-14\">\u985e\u4f3c\u30e1\u30bd\u30c3\u30c9(merge\u3001join)\u3068\u306e\u4f7f\u3044\u5206\u3051<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-15\">pandas concat\u3092\u4f7f\u3044\u3053\u306a\u3059\u305f\u3081\u306eTips<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-16\">concat\u3059\u308bDataFrame\u306e\u4e8b\u524d\u78ba\u8a8d\u3092\u6020\u3089\u306a\u3044<\/a>      <\/li>      <li>        <a href=\"#i-17\">\u30b3\u30fc\u30c9\u4f8b\u3084\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u6d3b\u7528\u3057\u3066\u7406\u89e3\u3092\u6df1\u3081\u308b<\/a>      <\/li>      <li>        <a href=\"#i-18\">\u7d50\u5408\u7d50\u679c\u306e\u6574\u5408\u6027\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u7fd2\u6163\u3092\u6301\u3064<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-19\">\u4ed6\u306epandas\u6a5f\u80fd\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u3046<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-20\">\u307e\u3068\u3081\uff1apandas\u306e\u30c7\u30fc\u30bf\u7d50\u5408\u30de\u30b9\u30bf\u30fc\u3092\u76ee\u6307\u305d\u3046<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-21\">concat\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u306e\u304a\u3055\u3089\u3044<\/a>      <\/li>      <li>        <a href=\"#i-22\">\u899a\u3048\u3066\u304a\u304d\u305f\u3044concat\u5fdc\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-23\">\u30c7\u30fc\u30bf\u7d50\u5408\u30b9\u30ad\u30eb\u5411\u4e0a\u306e\u305f\u3081\u306e\u5b66\u7fd2\u30ac\u30a4\u30c9<\/a>      <\/li>    <\/ul>  <\/li><\/ul>\n      \n    <\/div><\/div><h2 class=\"wp-block-heading\" id=\"i-0\">pandas concat\u3068\u306f\uff1f\u30c7\u30fc\u30bf\u7d50\u5408\u306e\u57fa\u672c\u3092\u89e3\u8aac<\/h2>\n\n\n\n<p>pandas\u306f\u3001\u30c7\u30fc\u30bf\u5206\u6790\u306b\u304a\u3044\u3066\u6b20\u304b\u305b\u306a\u3044Python\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u3059\u3002\u7279\u306b\u3001\u8907\u6570\u306e\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u7d50\u5408\u3059\u308b\u969b\u306b\u306f\u3001concat\u30e1\u30bd\u30c3\u30c9\u304c\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002\u672c\u7ae0\u3067\u306f\u3001pandas\u306b\u304a\u3051\u308b\u30c7\u30fc\u30bf\u7d50\u5408\u306e\u57fa\u672c\u7684\u306a\u8003\u3048\u65b9\u3068concat\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">pandas\u306b\u304a\u3051\u308b\u30c7\u30fc\u30bf\u7d50\u5408\u306e\u7a2e\u985e\u3068\u4f7f\u3044\u5206\u3051<\/h3>\n\n\n\n<p>pandas\u306b\u306f\u3001\u4e3b\u306b3\u3064\u306e\u30c7\u30fc\u30bf\u7d50\u5408\u30e1\u30bd\u30c3\u30c9\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>concat: \u6307\u5b9a\u3057\u305f\u8ef8(axis)\u306b\u6cbf\u3063\u3066DataFrame\u3084Series\u3092\u9023\u7d50\u3057\u307e\u3059\u3002\u8907\u6570\u306e\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u5358\u7d14\u306b\u7d50\u5408\u3059\u308b\u969b\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li>merge: \u30ad\u30fc\u5217\u3092\u6307\u5b9a\u3057\u3066\u3001DataFrame\u540c\u58eb\u3092\u7d50\u5408\u3057\u307e\u3059\u3002SQL\u306eJOIN\u306b\u4f3c\u3066\u304a\u308a\u3001\u95a2\u9023\u3059\u308b\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u7d50\u5408\u3059\u308b\u969b\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li>join: \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u30ad\u30fc\u3068\u3057\u3066DataFrame\u3092\u7d50\u5408\u3057\u307e\u3059\u3002\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u4e00\u81f4\u3059\u308b\u30c7\u30fc\u30bf\u3092\u7d50\u5408\u3059\u308b\u969b\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u30c7\u30fc\u30bf\u306e\u69cb\u9020\u3084\u7d50\u5408\u306e\u76ee\u7684\u306b\u5fdc\u3058\u3066\u4f7f\u3044\u5206\u3051\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001concat\u30e1\u30bd\u30c3\u30c9\u306b\u7126\u70b9\u3092\u5f53\u3066\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">concat\u30e1\u30bd\u30c3\u30c9\u306e\u7279\u5fb4\u3068\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h3>\n\n\n\n<p>concat\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u8907\u6570\u306eDataFrame\u3084Series\u3092\u6307\u5b9a\u3057\u305f\u8ef8(axis)\u306b\u6cbf\u3063\u3066\u9023\u7d50\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001concat\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u7684\u306a\u4f7f\u7528\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import pandas as pd\n\n# DataFrame\u306e\u4f5c\u6210\ndf1 = pd.DataFrame({'A': ['A0', 'A1', 'A2', 'A3'],\n                    'B': ['B0', 'B1', 'B2', 'B3'],\n                    'C': ['C0', 'C1', 'C2', 'C3'],\n                    'D': ['D0', 'D1', 'D2', 'D3']})\n\ndf2 = pd.DataFrame({'A': ['A4', 'A5', 'A6', 'A7'],\n                    'B': ['B4', 'B5', 'B6', 'B7'],\n                    'C': ['C4', 'C5', 'C6', 'C7'],\n                    'D': ['D4', 'D5', 'D6', 'D7']})\n\n# concat\u30e1\u30bd\u30c3\u30c9\u306b\u3088\u308bDataFrame\u306e\u9023\u7d50\nresult = pd.concat([df1, df2])\nprint(result)<\/pre>\n\n\n\n<p>\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001<code>df1<\/code>\u3068<code>df2<\/code>\u3068\u3044\u30462\u3064\u306eDataFrame\u3092\u4f5c\u6210\u3057\u3001<code>pd.concat()<\/code>\u3092\u4f7f\u3063\u3066\u9023\u7d50\u3057\u3066\u3044\u307e\u3059\u3002\u5f15\u6570\u306b\u306f\u3001\u9023\u7d50\u3059\u308bDataFrame\u306e\u30ea\u30b9\u30c8<code>[df1, df2]<\/code>\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>concat\u30e1\u30bd\u30c3\u30c9\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u4e3b\u8981\u306a\u5f15\u6570\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>objs<\/code>: \u9023\u7d50\u3059\u308bDataFrame\u3084Series\u306e\u30ea\u30b9\u30c8\u3002<\/li>\n\n\n\n<li><code>axis<\/code>: \u9023\u7d50\u3059\u308b\u8ef8\u30020(\u30c7\u30d5\u30a9\u30eb\u30c8)\u306f\u884c\u65b9\u5411\u30011\u306f\u5217\u65b9\u5411\u3002<\/li>\n\n\n\n<li><code>join<\/code>: \u9023\u7d50\u65b9\u6cd5\u3002\u2019outer'(\u30c7\u30d5\u30a9\u30eb\u30c8)\u306f\u548c\u96c6\u5408\u3001\u2019inner\u2019\u306f\u7a4d\u96c6\u5408\u3002<\/li>\n\n\n\n<li><code>ignore_index<\/code>: True\u306b\u3059\u308b\u3068\u3001\u9023\u7d50\u5f8c\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u632f\u308a\u76f4\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5f15\u6570\u3092\u9069\u5207\u306b\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u76ee\u7684\u306b\u5fdc\u3058\u305f\u30c7\u30fc\u30bf\u7d50\u5408\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>concat\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3067\u6d3b\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u540c\u3058\u69cb\u9020\u306e\u30c7\u30fc\u30bf\u3092\u7d50\u5408\u3057\u3066\u3001\u30c7\u30fc\u30bf\u91cf\u3092\u5897\u3084\u3059\u3002<\/li>\n\n\n\n<li>\u7570\u306a\u308b\u69cb\u9020\u306e\u30c7\u30fc\u30bf\u3092\u7d50\u5408\u3057\u3066\u3001\u65b0\u3057\u3044\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u4f5c\u308b\u3002<\/li>\n\n\n\n<li>\u6642\u7cfb\u5217\u30c7\u30fc\u30bf\u3092\u9023\u7d50\u3057\u3066\u3001\u9577\u671f\u7684\u306a\u5206\u6790\u3092\u884c\u3046\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u4ee5\u4e0a\u304c\u3001pandas\u306b\u304a\u3051\u308b\u30c7\u30fc\u30bf\u7d50\u5408\u306e\u57fa\u672c\u7684\u306a\u8003\u3048\u65b9\u3068concat\u30e1\u30bd\u30c3\u30c9\u306e\u6982\u8981\u3067\u3059\u3002\u6b21\u7ae0\u3067\u306f\u3001\u5177\u4f53\u7684\u306a\u4f7f\u7528\u4f8b\u3092\u4ea4\u3048\u3066\u3001concat\u30e1\u30bd\u30c3\u30c9\u306e\u5fdc\u7528\u7684\u306a\u4f7f\u3044\u65b9\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-3\">pandas concat\u306e\u4f7f\u7528\u4f8b\uff1a\u30b3\u30fc\u30c9\u4f8b\u3067\u5b66\u307c\u3046<\/h2>\n\n\n\n<p>\u524d\u7ae0\u3067\u306fconcat\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3092\u89e3\u8aac\u3057\u307e\u3057\u305f\u3002\u672c\u7ae0\u3067\u306f\u3001\u5177\u4f53\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3092\u4ea4\u3048\u3066\u3001concat\u30e1\u30bd\u30c3\u30c9\u306e\u69d8\u3005\u306a\u4f7f\u7528\u4f8b\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-4\">DataFrame\u306e\u884c\u65b9\u5411\u306e\u7d50\u5408<\/h3>\n\n\n\n<p>\u6700\u3082\u57fa\u672c\u7684\u306a\u4f7f\u7528\u4f8b\u306f\u3001\u8907\u6570\u306eDataFrame\u3092\u884c\u65b9\u5411\u306b\u7d50\u5408\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u4f8b\u3067\u306f\u3001<code>df1<\/code>\u3068<code>df2<\/code>\u3092\u884c\u65b9\u5411\u306b\u7d50\u5408\u3057\u3001<code>ignore_index=True<\/code>\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u7d50\u5408\u5f8c\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u632f\u308a\u76f4\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import pandas as pd\n\ndf1 = pd.DataFrame({'A': ['A0', 'A1', 'A2', 'A3'],\n                    'B': ['B0', 'B1', 'B2', 'B3'],\n                    'C': ['C0', 'C1', 'C2', 'C3'],\n                    'D': ['D0', 'D1', 'D2', 'D3']})\n\ndf2 = pd.DataFrame({'A': ['A4', 'A5', 'A6', 'A7'],\n                    'B': ['B4', 'B5', 'B6', 'B7'],\n                    'C': ['C4', 'C5', 'C6', 'C7'],\n                    'D': ['D4', 'D5', 'D6', 'D7']})\n\nresult = pd.concat([df1, df2], ignore_index=True)\nprint(result)<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">DataFrame\u306e\u5217\u65b9\u5411\u306e\u7d50\u5408<\/h3>\n\n\n\n<p>\u6b21\u306b\u3001DataFrame\u3092\u5217\u65b9\u5411\u306b\u7d50\u5408\u3059\u308b\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<code>axis=1<\/code>\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u5217\u65b9\u5411\u306e\u7d50\u5408\u304c\u884c\u308f\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import pandas as pd\n\ndf1 = pd.DataFrame({'A': ['A0', 'A1', 'A2', 'A3'],\n                    'B': ['B0', 'B1', 'B2', 'B3']})\n\ndf2 = pd.DataFrame({'C': ['C0', 'C1', 'C2', 'C3'],\n                    'D': ['D0', 'D1', 'D2', 'D3']})\n\nresult = pd.concat([df1, df2], axis=1)\nprint(result)<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-6\">\u8ef8(axis)\u3092\u6307\u5b9a\u3057\u305f\u7d50\u5408<\/h3>\n\n\n\n<p><code>axis<\/code>\u5f15\u6570\u3092\u4f7f\u3063\u3066\u3001\u7d50\u5408\u3059\u308b\u8ef8\u3092\u660e\u793a\u7684\u306b\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u4f8b\u3067\u306f\u3001<code>axis=0<\/code>\uff08\u884c\u65b9\u5411\uff09\u3068<code>axis=1<\/code>\uff08\u5217\u65b9\u5411\uff09\u306e\u7d50\u5408\u7d50\u679c\u3092\u6bd4\u8f03\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import pandas as pd\n\ndf1 = pd.DataFrame({'A': ['A0', 'A1', 'A2', 'A3'],\n                    'B': ['B0', 'B1', 'B2', 'B3']})\n\ndf2 = pd.DataFrame({'A': ['A4', 'A5', 'A6', 'A7'],\n                    'B': ['B4', 'B5', 'B6', 'B7']})\n\nresult_axis0 = pd.concat([df1, df2], axis=0)\nresult_axis1 = pd.concat([df1, df2], axis=1)\nprint(\"axis=0\u306e\u7d50\u679c:\\n\", result_axis0)\nprint(\"\\naxis=1\u306e\u7d50\u679c:\\n\", result_axis1)<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">\u7570\u306a\u308b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u6301\u3064DataFrame\u306e\u7d50\u5408<\/h3>\n\n\n\n<p>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u7570\u306a\u308bDataFrame\u3092\u7d50\u5408\u3059\u308b\u969b\u306b\u306f\u3001<code>join<\/code>\u5f15\u6570\u3092\u4f7f\u3063\u3066\u7d50\u5408\u65b9\u6cd5\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<code>join='outer'<\/code>\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\uff09\u3067\u306f\u548c\u96c6\u5408\u3001<code>join='inner'<\/code>\u3067\u306f\u7a4d\u96c6\u5408\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import pandas as pd\n\ndf1 = pd.DataFrame({'A': ['A0', 'A1', 'A2'],\n                    'B': ['B0', 'B1', 'B2']},\n                   index=['K0', 'K1', 'K2'])\n\ndf2 = pd.DataFrame({'C': ['C3', 'C4', 'C5'],\n                    'D': ['D3', 'D4', 'D5']},\n                   index=['K3', 'K4', 'K5'])\n\nresult_outer = pd.concat([df1, df2], axis=1, join='outer')\nresult_inner = pd.concat([df1, df2], axis=1, join='inner')\nprint(\"outer\u7d50\u5408\u306e\u7d50\u679c:\\n\", result_outer)\nprint(\"\\ninner\u7d50\u5408\u306e\u7d50\u679c:\\n\", result_inner)<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-8\">\u30de\u30eb\u30c1\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u6301\u3064DataFrame\u306e\u7d50\u5408<\/h3>\n\n\n\n<p>\u30de\u30eb\u30c1\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u6301\u3064DataFrame\u3082\u3001concat\u30e1\u30bd\u30c3\u30c9\u3067\u7d50\u5408\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u7d50\u5408\u5f8c\u306eDataFrame\u3082\u30de\u30eb\u30c1\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u7dad\u6301\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import pandas as pd\n\ndf1 = pd.DataFrame({'A': ['A0', 'A1', 'A2'],\n                    'B': ['B0', 'B1', 'B2']},\n                   index=[['K0', 'K0', 'K1'], ['K0', 'K1', 'K0']])\n\ndf2 = pd.DataFrame({'A': ['A3', 'A4', 'A5'],\n                    'B': ['B3', 'B4', 'B5']},\n                   index=[['K1', 'K2', 'K2'], ['K1', 'K0', 'K1']])\n\nresult = pd.concat([df1, df2])\nprint(result)<\/pre>\n\n\n\n<p>\u4ee5\u4e0a\u306e\u3088\u3046\u306b\u3001concat\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u69d8\u3005\u306a\u30c7\u30fc\u30bf\u7d50\u5408\u306e\u30cb\u30fc\u30ba\u306b\u5bfe\u5fdc\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u7ae0\u3067\u306f\u3001\u3088\u308a\u5b9f\u8df5\u7684\u306a\u30c7\u30fc\u30bf\u7d50\u5408\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-9\">pandas concat\u5fdc\u7528\u30c6\u30af\u30cb\u30c3\u30af\uff1a\u30c7\u30fc\u30bf\u7d50\u5408\u3092\u52b9\u7387\u5316\u3057\u3088\u3046<\/h2>\n\n\n\n<p>\u524d\u7ae0\u3067\u306f\u3001concat\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u7684\u306a\u4f7f\u7528\u4f8b\u3092\u898b\u3066\u304d\u307e\u3057\u305f\u3002\u672c\u7ae0\u3067\u306f\u3001\u3088\u308a\u5b9f\u8df5\u7684\u306a\u30c7\u30fc\u30bf\u7d50\u5408\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u7d50\u5408\u306e\u52b9\u7387\u3092\u5927\u5e45\u306b\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">\u30ad\u30fc(key)\u3092\u6307\u5b9a\u3057\u3066\u8907\u6570\u306eDataFrame\u3092\u7d50\u5408\u3059\u308b<\/h3>\n\n\n\n<p>concat\u30e1\u30bd\u30c3\u30c9\u306e<code>keys<\/code>\u5f15\u6570\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u7d50\u5408\u3059\u308bDataFrame\u306b\u30ad\u30fc\u3092\u5272\u308a\u5f53\u3066\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u7d50\u5408\u5f8c\u306eDataFrame\u3067\u306f\u3001\u5404DataFrame\u306e\u51fa\u6240\u3092\u8b58\u5225\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import pandas as pd\n\ndf1 = pd.DataFrame({'A': ['A0', 'A1', 'A2'],\n                    'B': ['B0', 'B1', 'B2']},\n                   index=['K0', 'K1', 'K2'])\n\ndf2 = pd.DataFrame({'C': ['C0', 'C1', 'C2'],\n                    'D': ['D0', 'D1', 'D2']},\n                   index=['K0', 'K1', 'K2'])\n\nresult = pd.concat([df1, df2], axis=1, keys=['df1', 'df2'])\nprint(result)<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">\u7d50\u5408\u3059\u308bDataFrame\u306e\u5f62\u72b6\u3092\u63c3\u3048\u308b<\/h3>\n\n\n\n<p>\u7d50\u5408\u3059\u308bDataFrame\u306e\u5f62\u72b6\u304c\u7570\u306a\u308b\u5834\u5408\u3001concat\u30e1\u30bd\u30c3\u30c9\u3092\u76f4\u63a5\u9069\u7528\u3059\u308b\u3068\u3001NaN\u304c\u542b\u307e\u308c\u308b\u7d50\u679c\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u5834\u5408\u306f\u3001\u4e8b\u524d\u306bDataFrame\u306e\u5f62\u72b6\u3092\u63c3\u3048\u3066\u304a\u304f\u3053\u3068\u3067\u3001\u5186\u6ed1\u306a\u30c7\u30fc\u30bf\u7d50\u5408\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import pandas as pd\n\ndf1 = pd.DataFrame({'A': ['A0', 'A1', 'A2'],\n                    'B': ['B0', 'B1', 'B2']},\n                   index=['K0', 'K1', 'K2'])\n\ndf2 = pd.DataFrame({'C': ['C0', 'C1'],\n                    'D': ['D0', 'D1']},\n                   index=['K0', 'K1'])\n\ndf2 = df2.reindex(df1.index)\nresult = pd.concat([df1, df2], axis=1)\nprint(result)<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-12\">\u7d50\u5408\u6642\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u51e6\u7406\u3092\u5de5\u592b\u3059\u308b<\/h3>\n\n\n\n<p>\u30c7\u30fc\u30bf\u7d50\u5408\u5f8c\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u91cd\u8981\u3067\u306a\u3044\u5834\u5408\u3084\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u91cd\u8907\u3092\u907f\u3051\u305f\u3044\u5834\u5408\u306f\u3001<code>reset_index()<\/code>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u632f\u308a\u76f4\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import pandas as pd\n\ndf1 = pd.DataFrame({'A': ['A0', 'A1', 'A2'],\n                    'B': ['B0', 'B1', 'B2']},\n                   index=['K0', 'K1', 'K2'])\n\ndf2 = pd.DataFrame({'C': ['C0', 'C1', 'C2'],\n                    'D': ['D0', 'D1', 'D2']},\n                   index=['K0', 'K2', 'K3'])\n\nresult = pd.concat([df1, df2], axis=1).reset_index(drop=True)\nprint(result)<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-13\">\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u3092\u5206\u5272\u3057\u3066\u7d50\u5408\u3059\u308b<\/h3>\n\n\n\n<p>\u975e\u5e38\u306b\u5927\u304d\u306a\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u4e00\u5ea6\u306b\u7d50\u5408\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u3001\u30e1\u30e2\u30ea\u4e0d\u8db3\u306a\u3069\u306e\u554f\u984c\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u5834\u5408\u306f\u3001\u30c7\u30fc\u30bf\u3092\u5206\u5272\u3057\u3066\u7d50\u5408\u3059\u308b\u3053\u3068\u3067\u3001\u52b9\u7387\u7684\u306b\u51e6\u7406\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import pandas as pd\n\ndfs = []\nfor i in range(5):\n    df = pd.DataFrame({'A': [f'A{i}', f'A{i+1}', f'A{i+2}'],\n                       'B': [f'B{i}', f'B{i+1}', f'B{i+2}']})\n    dfs.append(df)\n\nresult = pd.concat(dfs, ignore_index=True)\nprint(result)<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">\u985e\u4f3c\u30e1\u30bd\u30c3\u30c9(merge\u3001join)\u3068\u306e\u4f7f\u3044\u5206\u3051<\/h3>\n\n\n\n<p>pandas\u306b\u306f\u3001concat\u30e1\u30bd\u30c3\u30c9\u4ee5\u5916\u306b\u3082\u30c7\u30fc\u30bf\u7d50\u5408\u306e\u305f\u3081\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u308c\u305e\u308c\u306e\u7279\u5fb4\u3092\u7406\u89e3\u3057\u3001\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u30e1\u30bd\u30c3\u30c9\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>concat: \u5358\u7d14\u306a\u7d50\u5408\u3001\u8ef8\u3084\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u6307\u5b9a\u3057\u305f\u7d50\u5408\u306b\u4f7f\u7528<\/li>\n\n\n\n<li>merge: \u30ad\u30fc\u5217\u3092\u6307\u5b9a\u3057\u305f\u7d50\u5408\u3001SQL\u306eJOIN\u306b\u985e\u4f3c<\/li>\n\n\n\n<li>join: \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f7f\u3063\u305f\u7d50\u5408\u3001\u3042\u308b\u7a0b\u5ea6\u306e\u30c7\u30fc\u30bf\u52a0\u5de5\u304c\u5fc5\u8981<\/li>\n<\/ul>\n\n\n\n<p>\u4ee5\u4e0a\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001pandas\u306e\u30c7\u30fc\u30bf\u7d50\u5408\u3092\u3088\u308a\u52b9\u7387\u7684\u306b\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u7ae0\u3067\u306f\u3001concat\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3044\u3053\u306a\u3059\u305f\u3081\u306e\u3055\u3089\u306a\u308bTips\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-15\">pandas concat\u3092\u4f7f\u3044\u3053\u306a\u3059\u305f\u3081\u306eTips<\/h2>\n\n\n\n<p>\u524d\u7ae0\u3067\u306f\u3001concat\u30e1\u30bd\u30c3\u30c9\u3092\u52b9\u7387\u7684\u306b\u4f7f\u3046\u305f\u3081\u306e\u5fdc\u7528\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d39\u4ecb\u3057\u307e\u3057\u305f\u3002\u672c\u7ae0\u3067\u306f\u3001\u3055\u3089\u306b\u4e00\u6b69\u9032\u3093\u3067\u3001concat\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3044\u3053\u306a\u3059\u305f\u3081\u306eTips\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002\u3053\u308c\u3089\u306eTips\u3092\u5b9f\u8df5\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u7d50\u5408\u306e\u54c1\u8cea\u3068\u52b9\u7387\u3092\u9ad8\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-16\">concat\u3059\u308bDataFrame\u306e\u4e8b\u524d\u78ba\u8a8d\u3092\u6020\u3089\u306a\u3044<\/h3>\n\n\n\n<p>concat\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u524d\u306b\u3001\u7d50\u5408\u3059\u308bDataFrame\u306e\u5185\u5bb9\u3092\u5341\u5206\u306b\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u30c7\u30fc\u30bf\u306e\u5f62\u72b6\u3001\u30c7\u30fc\u30bf\u578b\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3001\u6b20\u640d\u5024\u306a\u3069\u3092\u4e8b\u524d\u306b\u30c1\u30a7\u30c3\u30af\u3057\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30c7\u30fc\u30bf\u306e\u524d\u51e6\u7406\u3092\u884c\u3044\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import pandas as pd\n\ndf1 = pd.DataFrame({'A': ['A0', 'A1', 'A2'],\n                    'B': ['B0', 'B1', 'B2']})\n\ndf2 = pd.DataFrame({'A': ['A3', 'A4', 'A5'],\n                    'C': ['C3', 'C4', 'C5']})\n\nprint(\"df1\u306e\u30c7\u30fc\u30bf\u578b:\\n\", df1.dtypes)\nprint(\"\\ndf2\u306e\u30c7\u30fc\u30bf\u578b:\\n\", df2.dtypes)\n\ndf2 = df2.reindex(columns=df1.columns, fill_value=0)\nresult = pd.concat([df1, df2], ignore_index=True)\nprint(\"\\n\u7d50\u5408\u7d50\u679c:\\n\", result)<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-17\">\u30b3\u30fc\u30c9\u4f8b\u3084\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u6d3b\u7528\u3057\u3066\u7406\u89e3\u3092\u6df1\u3081\u308b<\/h3>\n\n\n\n<p>concat\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9\u3092\u7fd2\u5f97\u3059\u308b\u305f\u3081\u306b\u3001\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3084\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3092\u53c2\u7167\u3059\u308b\u3053\u3068\u3092\u304a\u3059\u3059\u3081\u3057\u307e\u3059\u3002\u307e\u305f\u3001Stack Overflow\u306a\u3069\u306e\u30b5\u30a4\u30c8\u3067\u306f\u3001\u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3092\u898b\u3064\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u81ea\u5206\u3067\u5b9f\u9a13\u7528\u306e\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u52d5\u4f5c\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u3082\u3001\u7406\u89e3\u3092\u6df1\u3081\u308b\u305f\u3081\u306e\u52b9\u679c\u7684\u306a\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">\u7d50\u5408\u7d50\u679c\u306e\u6574\u5408\u6027\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u7fd2\u6163\u3092\u6301\u3064<\/h3>\n\n\n\n<p>\u30c7\u30fc\u30bf\u7d50\u5408\u3092\u884c\u3063\u305f\u5f8c\u306f\u3001\u7d50\u679c\u306e\u6574\u5408\u6027\u3092\u78ba\u8a8d\u3059\u308b\u7fd2\u6163\u3092\u6301\u3061\u307e\u3057\u3087\u3046\u3002\u7d50\u5408\u5f8c\u306e\u30c7\u30fc\u30bf\u4ef6\u6570\u3001\u30ab\u30e9\u30e0\u6570\u304c\u671f\u5f85\u901a\u308a\u3067\u3042\u308b\u304b\u3001\u30c7\u30fc\u30bf\u306e\u6b20\u640d\u3084\u91cd\u8907\u304c\u306a\u3044\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3057\u307e\u3059\u3002\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u3001\u30c7\u30fc\u30bf\u306e\u7d71\u8a08\u91cf\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u3082\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import pandas as pd\n\ndf1 = pd.DataFrame({'A': ['A0', 'A1', 'A2'],\n                    'B': ['B0', 'B1', 'B2']})\n\ndf2 = pd.DataFrame({'A': ['A1', 'A2', 'A3'],\n                    'B': ['B1', 'B2', 'B3']})\n\nresult = pd.concat([df1, df2])\nprint(\"\u7d50\u5408\u7d50\u679c:\\n\", result)\n\nprint(\"\\n\u30c7\u30fc\u30bf\u4ef6\u6570:\", len(result))\nprint(\"\u30ab\u30e9\u30e0\u6570:\", len(result.columns))\nprint(\"\u91cd\u8907\u30c7\u30fc\u30bf:\\n\", result[result.duplicated()])<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-19\">\u4ed6\u306epandas\u6a5f\u80fd\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u3046<\/h3>\n\n\n\n<p>concat\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u4ed6\u306epandas\u6a5f\u80fd\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3055\u3089\u306b\u5f37\u529b\u306a\u30c7\u30fc\u30bf\u51e6\u7406\u30c4\u30fc\u30eb\u306b\u306a\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001groupby\u3084pivot_table\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u30c7\u30fc\u30bf\u3092\u96c6\u7d04\u3057\u305f\u308a\u3001apply\u3084lambda\u3092\u4f7f\u3063\u3066\u30ab\u30b9\u30bf\u30e0\u51e6\u7406\u3092\u9069\u7528\u3057\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001merge\u3084join\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u7d50\u5408\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import pandas as pd\n\ndf1 = pd.DataFrame({'A': ['A0', 'A1', 'A2'],\n                    'B': ['B0', 'B1', 'B2'],\n                    'C': [1, 2, 3]})\n\ndf2 = pd.DataFrame({'A': ['A0', 'A1', 'A2'],\n                    'B': ['B0', 'B1', 'B2'],\n                    'D': [4, 5, 6]})\n\nresult = pd.concat([df1, df2])\nresult = result.groupby(['A', 'B'], as_index=False).sum()\nprint(result)<\/pre>\n\n\n\n<p>\u4ee5\u4e0a\u306eTips\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001concat\u30e1\u30bd\u30c3\u30c9\u3092\u3088\u308a\u52b9\u679c\u7684\u306b\u4f7f\u3044\u3053\u306a\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002\u6b21\u7ae0\u3067\u306f\u3001\u672c\u8a18\u4e8b\u306e\u307e\u3068\u3081\u3068\u3001\u3055\u3089\u306a\u308b\u30b9\u30ad\u30eb\u30a2\u30c3\u30d7\u306e\u305f\u3081\u306e\u30a2\u30c9\u30d0\u30a4\u30b9\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-20\">\u307e\u3068\u3081\uff1apandas\u306e\u30c7\u30fc\u30bf\u7d50\u5408\u30de\u30b9\u30bf\u30fc\u3092\u76ee\u6307\u305d\u3046<\/h2>\n\n\n\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001pandas\u306econcat\u30e1\u30bd\u30c3\u30c9\u3092\u4e2d\u5fc3\u306b\u3001\u30c7\u30fc\u30bf\u7d50\u5408\u306e\u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u3067\u3092\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u304d\u307e\u3057\u305f\u3002\u3053\u3053\u3067\u3001\u3053\u308c\u307e\u3067\u306e\u5185\u5bb9\u3092\u632f\u308a\u8fd4\u308a\u3001\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\u3092\u78ba\u8a8d\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-21\">concat\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u306e\u304a\u3055\u3089\u3044<\/h3>\n\n\n\n<p>concat\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u8907\u6570\u306eDataFrame\u3084Series\u3092\u6307\u5b9a\u3057\u305f\u8ef8\uff08axis\uff09\u306b\u6cbf\u3063\u3066\u9023\u7d50\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002\u4e3b\u8981\u306a\u5f15\u6570\u306b\u306f\u3001\u9023\u7d50\u3059\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30ea\u30b9\u30c8\uff08<code>objs<\/code>\uff09\u3001\u9023\u7d50\u3059\u308b\u8ef8\uff08<code>axis<\/code>\uff09\u3001\u9023\u7d50\u65b9\u6cd5\uff08<code>join<\/code>\uff09\u306a\u3069\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import pandas as pd\n\ndf1 = pd.DataFrame({'A': ['A0', 'A1', 'A2'],\n                    'B': ['B0', 'B1', 'B2']})\n\ndf2 = pd.DataFrame({'A': ['A3', 'A4', 'A5'],\n                    'B': ['B3', 'B4', 'B5']})\n\nresult = pd.concat([df1, df2], ignore_index=True)\nprint(result)<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-22\">\u899a\u3048\u3066\u304a\u304d\u305f\u3044concat\u5fdc\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5fdc\u7528\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7fd2\u5f97\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u7d50\u5408\u306e\u5e45\u304c\u5927\u304d\u304f\u5e83\u304c\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30ad\u30fc\uff08key\uff09\u3092\u6307\u5b9a\u3057\u3066\u8907\u6570\u306eDataFrame\u3092\u7d50\u5408\u3059\u308b\u3002<\/li>\n\n\n\n<li>\u7d50\u5408\u3059\u308bDataFrame\u306e\u5f62\u72b6\u3092\u63c3\u3048\u308b\u3002<\/li>\n\n\n\n<li>\u7d50\u5408\u6642\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u51e6\u7406\u3092\u5de5\u592b\u3059\u308b\u3002<\/li>\n\n\n\n<li>\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u3092\u5206\u5272\u3057\u3066\u7d50\u5408\u3059\u308b\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import pandas as pd\n\ndf1 = pd.DataFrame({'A': ['A0', 'A1', 'A2'],\n                    'B': ['B0', 'B1', 'B2']},\n                   index=['K0', 'K1', 'K2'])\n\ndf2 = pd.DataFrame({'C': ['C0', 'C1', 'C2'],\n                    'D': ['D0', 'D1', 'D2']},\n                   index=['K0', 'K1', 'K2'])\n\nresult = pd.concat([df1, df2], axis=1, keys=['df1', 'df2'])\nprint(result)<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-23\">\u30c7\u30fc\u30bf\u7d50\u5408\u30b9\u30ad\u30eb\u5411\u4e0a\u306e\u305f\u3081\u306e\u5b66\u7fd2\u30ac\u30a4\u30c9<\/h3>\n\n\n\n<p>pandas\u306e\u30c7\u30fc\u30bf\u7d50\u5408\u30b9\u30ad\u30eb\u3092\u3055\u3089\u306b\u5411\u4e0a\u3055\u305b\u308b\u305f\u3081\u306b\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5b66\u7fd2\u65b9\u6cd5\u3092\u304a\u3059\u3059\u3081\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3084\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3092\u6d3b\u7528\u3059\u308b\u3002<\/li>\n\n\n\n<li>pandas\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8: <a href=\"https:\/\/pandas.pydata.org\/docs\/\">https:\/\/pandas.pydata.org\/docs\/<\/a><\/li>\n\n\n\n<li>pandas\u516c\u5f0f\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb: <a href=\"https:\/\/pandas.pydata.org\/docs\/getting_started\/intro_tutorials\/index.html\">https:\/\/pandas.pydata.org\/docs\/getting_started\/intro_tutorials\/index.html<\/a><\/li>\n\n\n\n<li>\u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3092\u63a2\u3057\u3001\u81ea\u5206\u3067\u5b9f\u9a13\u3059\u308b\u3002<\/li>\n\n\n\n<li>GitHub\u4e0a\u306epandas\u3092\u4f7f\u3063\u305f\u30d7\u30ed\u30b8\u30a7\u30af\u30c8<\/li>\n\n\n\n<li>Stack Overflow\u306e\u95a2\u9023\u8cea\u554f\u3068\u56de\u7b54<\/li>\n\n\n\n<li>\u30c7\u30fc\u30bf\u7d50\u5408\u306e\u5b9f\u8df5\u3092\u7a4d\u3080\u3002<\/li>\n\n\n\n<li>Kaggle\u306a\u3069\u306e\u30c7\u30fc\u30bf\u5206\u6790\u30b3\u30f3\u30da\u30c6\u30a3\u30b7\u30e7\u30f3\u306b\u53c2\u52a0\u3059\u308b\u3002<\/li>\n\n\n\n<li>\u81ea\u5206\u3067\u8208\u5473\u306e\u3042\u308b\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u898b\u3064\u3051\u3001\u5206\u6790\u3059\u308b\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u4ee5\u4e0a\u3067\u3001\u300c\u56f3\u89e3\u3068\u30b3\u30fc\u30c9\u4f8b\u3067\u5b66\u3076pandas concat\u306e\u4f7f\u3044\u65b9\u300d\u306e\u89e3\u8aac\u3092\u7d42\u308f\u308a\u307e\u3059\u3002\u672c\u8a18\u4e8b\u3067\u7d39\u4ecb\u3057\u305f\u5185\u5bb9\u3092\u6d3b\u304b\u3057\u3001pandas concat\u3092\u306f\u3058\u3081\u3068\u3059\u308b\u30c7\u30fc\u30bf\u7d50\u5408\u306e\u6280\u8853\u3092\u78e8\u3044\u3066\u3044\u3063\u3066\u304f\u3060\u3055\u3044\u3002\u7686\u3055\u3093\u304cpandas\u306e\u30c7\u30fc\u30bf\u7d50\u5408\u30de\u30b9\u30bf\u30fc\u306b\u306a\u308b\u3053\u3068\u3092\u9858\u3063\u3066\u3044\u307e\u3059\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>pandas\u306e\u30c7\u30fc\u30bf\u7d50\u5408\u3067\u60a9\u3093\u3067\u3044\u307e\u305b\u3093\u304b\uff1fconcat\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9\u304c\u308f\u304b\u3089\u306a\u3044\u3001\u30c7\u30fc\u30bf\u7d50\u5408\u306e\u52b9\u7387\u304c\u60aa\u3044\u306a\u3069\u306e\u554f\u984c\u3092\u62b1\u3048\u3066\u3044\u308b\u65b9\u3082\u591a\u3044\u306e\u3067\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u304b\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001\u521d\u5fc3\u8005\u304b\u3089\u4e2d\u7d1a\u8005\u307e\u3067\u5fc5\u898b\u306e\u3001pandas con &#8230; <\/p>\n","protected":false},"author":1,"featured_media":841,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":{"0":"post-807","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-python"},"_links":{"self":[{"href":"https:\/\/chocottopro.com\/index.php?rest_route=\/wp\/v2\/posts\/807","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/chocottopro.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/chocottopro.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/chocottopro.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/chocottopro.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=807"}],"version-history":[{"count":1,"href":"https:\/\/chocottopro.com\/index.php?rest_route=\/wp\/v2\/posts\/807\/revisions"}],"predecessor-version":[{"id":808,"href":"https:\/\/chocottopro.com\/index.php?rest_route=\/wp\/v2\/posts\/807\/revisions\/808"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/chocottopro.com\/index.php?rest_route=\/wp\/v2\/media\/841"}],"wp:attachment":[{"href":"https:\/\/chocottopro.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=807"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/chocottopro.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=807"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/chocottopro.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=807"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}