{"id":2407,"date":"2022-03-02T19:02:38","date_gmt":"2022-03-02T10:02:38","guid":{"rendered":"https:\/\/aiacademy.jp\/media\/?p=2407"},"modified":"2024-07-25T11:44:11","modified_gmt":"2024-07-25T02:44:11","slug":"pandas-to_csv%e3%81%a7-unnamed-0-%e3%81%a8%e3%81%84%e3%81%86%e3%82%ab%e3%83%a9%e3%83%a0%e3%81%8c%e4%bd%9c%e6%88%90%e3%81%95%e3%82%8c%e3%81%9f%e6%99%82%e3%81%ae%e5%af%be%e5%87%a6%e6%b3%95","status":"publish","type":"post","link":"https:\/\/aiacademy.jp\/media\/?p=2407","title":{"rendered":"Pandas to_csv()\u3067 Unnamed: 0 \u3068\u3044\u3046\u30ab\u30e9\u30e0\u304c\u4f5c\u6210\u3055\u308c\u305f\u6642\u306e\u5bfe\u51e6\u6cd5"},"content":{"rendered":"<div id=\"sgb-css-id-1\">\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-font-size is-style-fill has-medium-font-size\"><a class=\"wp-block-button__link has-vivid-green-cyan-background-color has-background wp-element-button\" href=\"https:\/\/lin.ee\/3E4GzWk\" rel=\"nofollow noopener\" target=\"_blank\">LINE\u53cb\u3060\u3061\u767b\u9332 \u25b6 Python\u30b3\u30fc\u30b9 \u25b6 \u53d7\u8b1b\u5272\u5f15\u30af\u30fc\u30dd\u30f3 \u7121\u6599\u52d5\u753b<\/a><\/div>\n<\/div>\n<\/div>\n\n\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306fPandas\u3092\u7528\u3044\u3066\u30c7\u30fc\u30bf\u30d5\u30ec\u30fc\u30e0\uff08DataFrame\uff09\u3092\u66f8\u304d\u51fa\u3057\u3059\u308b\u969b\u306b\u3001to_csv()\u3092\u7528\u3044\u308b\u3068\u3001\u300cUnnamed: 0\u300d\u3068\u3044\u3046\u30ab\u30e9\u30e0\u304c\u4f5c\u6210\u3055\u308c\u56f0\u3063\u305f\u30fb\u30fb\u30fb\u3068\u3044\u3046\u65b9\u5411\u3051\u306e\u8a18\u4e8b\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u201c<meta charset=\"utf-8\">Unnamed: 0\u2033\u30ab\u30e9\u30e0\u3092\u975e\u8868\u793a\u306b\u3057\u305f\u3044\u3068\u3044\u3046\u65b9\u3084\u3001\u300cUnnamed: 0\u300d\u30ab\u30e9\u30e0\u304c\u4f5c\u6210\u3055\u308c\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u305f\u3081\u306b\u306f\u3069\u3046\u3059\u308c\u3070\u826f\u3044\u306e\u304b\u77e5\u308a\u305f\u3044\u3068\u3044\u3046\u65b9\u306f\u662f\u975e\u8aad\u3093\u3067\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"toc\">    <div id=\"toc_container\" class=\"sgb-toc--no-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\">    <span><\/span>    <ul class=\"menu_level_1\">      <li class=\"first last\">        <a href=\"#i-0\">\u89e3\u6c7a\u65b9\u6cd5\uff08\u7d50\u8ad6\uff09<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-1\">Python\u3092\u52b9\u7387\u3088\u304f\u5b66\u3076\u306b\u306f\uff1f<\/a>  <\/li><\/ul>\n      \n    <\/div><\/div><div class=\"toc\"><p><\/p>\n<\/div><h2 class=\"wp-block-heading\" id=\"i-0\">\u89e3\u6c7a\u65b9\u6cd5\uff08\u7d50\u8ad6\uff09<\/h2>\n\n\n\n<p>\u7d50\u8ad6\u304b\u3089\u5148\u306b\u304a\u4f1d\u3048\u81f4\u3057\u307e\u3059\u3002<strong>\u89e3\u6c7a\u65b9\u6cd5\u306f\u3001to_csv()\u306e\u5f15\u6570\u306bindex=False\u3092\u6307\u5b9a\u3059\u308c\u3070\u826f\u3044\u3067\u3059\u3002<\/strong><\/p>\n\n\n\n<p>\u305d\u308c\u3067\u306f\u5b9f\u969b\u306bindex=False\u3092\u6307\u5b9a\u3057\u306a\u3044\u30d1\u30bf\u30fc\u30f3\u3068\u6307\u5b9a\u3057\u305f\u30d1\u30bf\u30fc\u30f3\u306e\u9055\u3044\u3092\u78ba\u8a8d\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>\u5148\u305a\u306f\u3001<meta charset=\"utf-8\">index=False\u3092\u6307\u5b9a\u3057\u306a\u3044\u30d1\u30bf\u30fc\u30f3\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import pandas as pd\ndata = [[63, \"B\"],\n         [45, \"C\"],\n         [ 85, \"A\"]]\n\ndf = pd.DataFrame(data=data, columns= [\"\u5f97\u70b9\", \"\u30e9\u30f3\u30af\"])\ndf.to_csv('data1.csv')<\/code><\/pre>\n\n\n\n<p>\u305d\u306e\u5f8c\u3001read_csv()\u3092\u7528\u3044\u3066\u8aad\u307f\u8fbc\u3093\u3067\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>df = pd.read_csv(\"data1.csv\")\ndf<\/code><\/pre>\n\n\n\n<p>\u3059\u308b\u3068\u3001\u6848\u306e\u5b9a\u3000Unnamed: 0 \u30ab\u30e9\u30e0\u304c\u4f5c\u6210\u3055\u308c\u3066\u3057\u307e\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"234\" height=\"128\" src=\"https:\/\/aiacademy.jp\/media\/wp-content\/uploads\/2022\/03\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2022-03-02-18.54.00.png\" alt=\"\" class=\"wp-image-2408\"><\/figure>\n\n\n\n<p>\u3061\u306a\u307f\u306b\u3067\u3059\u304c\u3001to_csv()\u306bindex=False\u3092\u3064\u3051\u5fd8\u308c\u3066\u3057\u307e\u3063\u305f\u3068\u3057\u3066\u3082\u3001 read_csv()\u5229\u7528\u6642\u306b\u3001 index_col=0 \u3092\u3064\u3051\u3066\u8aad\u307f\u8fbc\u3081\u3070\u3001 \u300cUnnamed: 0\u300d\u3068\u3044\u3046\u30ab\u30e9\u30e0\u306f\u8aad\u307f\u8fbc\u307e\u308c\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>df = pd.read_csv(\"data1.csv\",index_col=0)\ndf<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"123\" height=\"126\" src=\"https:\/\/aiacademy.jp\/media\/wp-content\/uploads\/2022\/03\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2022-03-02-18.55.18.png\" alt=\"\" class=\"wp-image-2409\"><\/figure>\n\n\n\n<p>\u3067\u306f\u7d9a\u3044\u3066\u3001<meta charset=\"utf-8\">index=False\u3092\u6307\u5b9a\u3057\u305f\u30d1\u30bf\u30fc\u30f3\u3092\u78ba\u8a8d\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import pandas as pd\ndata = [[63, \"B\"],\n         [45, \"C\"],\n         [ 85, \"A\"]]\n\ndf = pd.DataFrame(data=data, columns= [\"\u5f97\u70b9\", \"\u30e9\u30f3\u30af\"])\ndf.to_csv('data2.csv', index=False)<\/code><\/pre>\n\n\n\n<p>\u305d\u308c\u3067\u306fread_csv()\u306bindex_col=0\u3092\u3064\u3051\u305a\u306b\u3001\u7d20\u76f4\u306bread_csv()\u3092\u5b9f\u884c\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>df = pd.read_csv(\"data2.csv\")\ndf<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"123\" height=\"126\" src=\"https:\/\/aiacademy.jp\/media\/wp-content\/uploads\/2022\/03\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2022-03-02-18.55.18.png\" alt=\"\" class=\"wp-image-2409\"><\/figure>\n\n\n\n<p>\u3059\u308b\u3068\u6b63\u3057\u304f\u3001<meta charset=\"utf-8\">\u300cUnnamed: 0\u300d\u30ab\u30e9\u30e0\u304c\u4f5c\u6210\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u304c\u78ba\u8a8d\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"i-1\">Python\u3092\u52b9\u7387\u3088\u304f\u5b66\u3076\u306b\u306f\uff1f<\/h1>\n\n\n\n<p>Python\u3092\u52b9\u7387\u3088\u304f\u5b66\u3076\u306b\u306f\u3001\u666e\u6bb5\u304b\u3089Python\u3092\u5229\u7528\u3057\u3066\u3044\u308b\u73fe\u5f79\u306e\u30c7\u30fc\u30bf\u30b5\u30a4\u30a8\u30f3\u30c6\u30a3\u30b9\u30c8\u3084\u6a5f\u68b0\u5b66\u7fd2\u30a8\u30f3\u30b8\u30cb\u30a2\u306b\u8cea\u554f\u3067\u304d\u308b\u74b0\u5883\u3067\u5b66\u3076\u3053\u3068\u3067\u3059\u3002<br>\u8cea\u554f\u3057\u653e\u984c\u304b\u3064\u3001\u4f53\u7cfb\u7684\u306b\u5b66\u3079\u308b\u52d5\u753b\u30b3\u30f3\u30c6\u30f3\u30c4\u3067\u30c7\u30fc\u30bf\u5206\u6790\u6280\u8853\u3092\u5b66\u3073\u305f\u3044\u65b9\u306f\u3001\u30aa\u30f3\u30e9\u30a4\u30f3\u3067\u597d\u304d\u306a\u6642\u9593\u306b\u52c9\u5f37\u3067\u304d\u308b<a href=\"https:\/\/aiacademy.jp\/bootcamp\">AI Academy Bootcamp<\/a>\u304c\u30aa\u30b9\u30b9\u30e1\u3067\u3059\u3002\u53d7\u8b1b\u6599\u3082\u696d\u754c\u6700\u5b89\u5024\u306e35,000\u5186\uff08\uff16\u30f6\u6708\u9593\u8cea\u554f\u3057\u653e\u984c\uff0b\u30aa\u30ea\u30b8\u30ca\u30eb\u306e\u52d5\u753b\u30b3\u30f3\u30c6\u30f3\u30c4\u3001\u30c6\u30ad\u30b9\u30c8\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u5229\u7528\u53ef\u80fd\uff09\u306a\u306e\u3067\u3001\u662f\u975e\u3054\u6d3b\u7528\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/aiacademy.jp\/bootcamp\/\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"341\" src=\"https:\/\/aiacademy.jp\/media\/wp-content\/uploads\/2021\/12\/bootcamp_ad_72ppi-1024x341.png\" alt=\"\" class=\"wp-image-691\" srcset=\"https:\/\/aiacademy.jp\/media\/wp-content\/uploads\/2021\/12\/bootcamp_ad_72ppi-1024x341.png 1024w, https:\/\/aiacademy.jp\/media\/wp-content\/uploads\/2021\/12\/bootcamp_ad_72ppi-300x100.png 300w, https:\/\/aiacademy.jp\/media\/wp-content\/uploads\/2021\/12\/bootcamp_ad_72ppi-768x256.png 768w, https:\/\/aiacademy.jp\/media\/wp-content\/uploads\/2021\/12\/bootcamp_ad_72ppi-940x313.png 940w, https:\/\/aiacademy.jp\/media\/wp-content\/uploads\/2021\/12\/bootcamp_ad_72ppi.png 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\"><\/a><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>\u3053\u306e\u8a18\u4e8b\u3067\u306fPandas\u3092\u7528\u3044\u3066\u30c7\u30fc\u30bf\u30d5\u30ec\u30fc\u30e0\uff08DataFrame\uff09\u3092\u66f8\u304d\u51fa\u3057\u3059\u308b\u969b\u306b\u3001to_csv()\u3092\u7528\u3044\u308b\u3068\u3001\u300cUnnamed: 0\u300d\u3068\u3044\u3046\u30ab\u30e9\u30e0\u304c\u4f5c\u6210\u3055\u308c\u56f0\u3063\u305f\u30fb\u30fb\u30fb\u3068\u3044\u3046\u65b9\u5411\u3051\u306e\u8a18\u4e8b\u3067\u3059\u3002 \u201cUnnamed:  &#8230; <\/p>\n","protected":false},"author":1,"featured_media":2411,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[173,85],"tags":[],"class_list":{"0":"post-2407","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-pandas","8":"category-python"},"_links":{"self":[{"href":"https:\/\/aiacademy.jp\/media\/index.php?rest_route=\/wp\/v2\/posts\/2407","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aiacademy.jp\/media\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aiacademy.jp\/media\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aiacademy.jp\/media\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aiacademy.jp\/media\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2407"}],"version-history":[{"count":2,"href":"https:\/\/aiacademy.jp\/media\/index.php?rest_route=\/wp\/v2\/posts\/2407\/revisions"}],"predecessor-version":[{"id":4602,"href":"https:\/\/aiacademy.jp\/media\/index.php?rest_route=\/wp\/v2\/posts\/2407\/revisions\/4602"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/aiacademy.jp\/media\/index.php?rest_route=\/wp\/v2\/media\/2411"}],"wp:attachment":[{"href":"https:\/\/aiacademy.jp\/media\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2407"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aiacademy.jp\/media\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2407"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aiacademy.jp\/media\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2407"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}