{"id":120447,"date":"2024-03-23T22:30:50","date_gmt":"2024-03-23T13:30:50","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/python%e3%81%aeread_csv%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af\/"},"modified":"2024-03-27T14:00:04","modified_gmt":"2024-03-27T05:00:04","slug":"python%e3%81%aeread_csv%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/python%e3%81%aeread_csv%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af\/","title":{"rendered":"Python\u306eread_csv\u95a2\u6570\u306e\u4f7f\u3044\u65b9\u306f?"},"content":{"rendered":"<p>pandas\u30e9\u30a4\u30d6\u30e9\u30ea\u95a2\u6570read_csv\u306fCSV\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u53d6\u308a\u3001DataFrame\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5909\u63db\u3059\u308b\u3002<\/p>\n<p>\u4ee5\u4e0b\u306bread_csv\u95a2\u6570\u306e\u4f7f\u7528\u65b9\u6cd5\u3092\u8a18\u8f09\u3057\u307e\u3059\u3002<\/p>\n<ol>\n<li>\u30d1\u30f3\u30c0<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> pandas <span class=\"hljs-keyword\">as<\/span> pd\r\n<\/code><\/pre>\n<ol>\n<li>csv\u8aad\u307f\u8fbc\u307f<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code>df = pd.read_csv(<span class=\"hljs-string\">'file.csv'<\/span>)\r\n<\/code><\/pre>\n<p>CSV \u30d5\u30a1\u30a4\u30eb\u3092\u683c\u7d0d\u3059\u308b\u30d1\u30b9\u3092 file.csv \u306b\u6307\u5b9a\u3057\u307e\u3059.<\/p>\n<ol>\n<li>\u30cd\u30a4\u30c6\u30a3\u30d6\u306a\u5f62\u3067\u65e5\u672c\u8a9e\u306b\u8a00\u3044\u63db\u3048\u307e\u3059\u30021 \u3064\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u307f\u3067\u69cb\u3044\u307e\u305b\u3093\u3002<\/li>\n<li>\u4eca\u3059\u3050\u304a\u652f\u6255\u3044\u304c\u53ef\u80fd\u3067\u3059<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code>df = pd.read_csv(<span class=\"hljs-string\">'file.csv'<\/span>, sep=<span class=\"hljs-string\">';'<\/span>)\r\n<\/code><\/pre>\n<ol>\n<li>\u65e5\u672c\u539f\u7523<\/li>\n<li>\u985e\u63a8\u3059\u308b<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code>df = pd.read_csv(<span class=\"hljs-string\">'file.csv'<\/span>, header=<span class=\"hljs-number\">0<\/span>)\r\n<\/code><\/pre>\n<p>header=0\u306e\u3068\u304d\u306f\u30011\u884c\u76ee\u3092\u30d8\u30c3\u30c0\u30fc\u884c\u3001header=None\u306e\u3068\u304d\u306f\u30d8\u30c3\u30c0\u30fc\u884c\u304c\u306a\u3044\u3053\u3068\u3092\u793a\u3059<\/p>\n<ol>\n<li>\u540d\u524d\u306e\u307f\u3001\u30cd\u30a4\u30c6\u30a3\u30d6\u306a\u65e5\u672c\u8a9e\u3067\u8a00\u3044\u63db\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code>df = pd.read_csv(<span class=\"hljs-string\">'file.csv'<\/span>, names=[<span class=\"hljs-string\">'col1'<\/span>, <span class=\"hljs-string\">'col2'<\/span>, <span class=\"hljs-string\">'col3'<\/span>])\r\n<\/code><\/pre>\n<p>\u3053\u306e\u3046\u3061[&#8216;col1&#8217;, &#8216;col2&#8217;, &#8216;col3&#8217;]\u306f\u72ec\u81ea\u306e\u5217\u540d\u306e\u30ea\u30b9\u30c8\u3067\u3059\u3002<\/p>\n<ol>\n<li>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u5217<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code>df = pd.read_csv(<span class=\"hljs-string\">'file.csv'<\/span>, index_col=<span class=\"hljs-number\">0<\/span>)\r\n<\/code><\/pre>\n<p>\u3053\u3053\u3067\u3001index_col=0\u306f\u6700\u521d\u306e\u5217\u3092\u7d22\u5f15\u306b\u3059\u308b\u3053\u3068\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<ol>\n<li>\u30cd\u30a4\u30c6\u30a3\u30d6\u306e\u65e5\u672c\u8a9e\u3067\u8a00\u3044\u63db\u3048\u308b\u3068\u3001<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code>df = pd.read_csv(<span class=\"hljs-string\">'file.csv'<\/span>, dtype={<span class=\"hljs-string\">'col1'<\/span>: <span class=\"hljs-built_in\">str<\/span>, <span class=\"hljs-string\">'col2'<\/span>: <span class=\"hljs-built_in\">int<\/span>, <span class=\"hljs-string\">'col3'<\/span>: <span class=\"hljs-built_in\">float<\/span>})\r\n<\/code><\/pre>\n<p>\u30ab\u30e9\u30e0\u306e\u30c7\u30fc\u30bf\u578b\u3092\u793a\u3059\u8f9e\u66f8\u304c{&#8216;col1&#8217;: str, &#8216;col2&#8217;: int, &#8216;col3&#8217;: float}\u3068\u3057\u3066\u4e0e\u3048\u3089\u308c\u308b\u3002<\/p>\n<ol>\n<li>skiprows<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code>df = pd.read_csv(<span class=\"hljs-string\">'file.csv'<\/span>, skiprows=[<span class=\"hljs-number\">0<\/span>, <span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">3<\/span>])\r\n<\/code><\/pre>\n<p>skiprows=[0, 2, 3]\u306f\u30011\u884c\u76ee\u30013\u884c\u76ee\u30014\u884c\u76ee\u3092\u30b9\u30ad\u30c3\u30d7\u3059\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u3089\u306fread_csv\u95a2\u6570\u306e\u3088\u304f\u4f7f\u7528\u3055\u308c\u308b\u4e00\u90e8\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3067\u3059\u304c\u3001\u3055\u3089\u306b\u591a\u304f\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u30cb\u30fc\u30ba\u306b\u5fdc\u3058\u3066\u8a2d\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>pandas\u30e9\u30a4\u30d6\u30e9\u30ea\u95a2\u6570read_csv\u306fCSV\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u53d6\u308a\u3001DataFrame\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5909\u63db\u3059\u308b\u3002 \u4ee5\u4e0b\u306bread_csv\u95a2\u6570\u306e\u4f7f\u7528\u65b9\u6cd5\u3092\u8a18\u8f09\u3057\u307e\u3059\u3002 \u30d1\u30f3\u30c0 import pandas as pd csv [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-120447","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Python\u306eread_csv\u95a2\u6570\u306e\u4f7f\u3044\u65b9\u306f? - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/ja\/blog\/python\u306eread_csv\u95a2\u6570\u306e\u4f7f\u3044\u65b9\u306f\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Python\u306eread_csv\u95a2\u6570\u306e\u4f7f\u3044\u65b9\u306f?\" \/>\n<meta property=\"og:description\" content=\"pandas\u30e9\u30a4\u30d6\u30e9\u30ea\u95a2\u6570read_csv\u306fCSV\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u53d6\u308a\u3001DataFrame\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5909\u63db\u3059\u308b\u3002 \u4ee5\u4e0b\u306bread_csv\u95a2\u6570\u306e\u4f7f\u7528\u65b9\u6cd5\u3092\u8a18\u8f09\u3057\u307e\u3059\u3002 \u30d1\u30f3\u30c0 import pandas as pd csv [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/python\u306eread_csv\u95a2\u6570\u306e\u4f7f\u3044\u65b9\u306f\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-23T13:30:50+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-27T05:00:04+00:00\" \/>\n<meta name=\"author\" content=\"\u7d50\u8863, \u6625\u82b1\" \/>\n<meta name=\"twitter:card\" 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