{"id":2752,"date":"2019-07-15T08:29:06","date_gmt":"2019-07-14T23:29:06","guid":{"rendered":"https:\/\/sinyblog.com\/?p=2752"},"modified":"2019-07-15T08:29:06","modified_gmt":"2019-07-14T23:29:06","slug":"pandas-001","status":"publish","type":"post","link":"https:\/\/sinyblog.com\/python\/pandas-001\/","title":{"rendered":"\u3010python\u3011pandas\u306e\u3061\u3087\u3063\u3068\u30de\u30cb\u30a2\u30c3\u30af\u306a\u4f7f\u3044\u65b9"},"content":{"rendered":"<p><span>\u3053\u3093\u306b\u3061\u306f\u3002<a href=\"https:\/\/twitter.com\/shinya_hd\" target=\"_blank\" rel=\"noopener noreferrer\">siny<\/a>\u3067\u3059\u3002<\/span><\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u3061\u3087\u3063\u3068\u30de\u30cb\u30a2\u30c3\u30af\u306apython\u306e\u30c6\u30af\u30cb\u30c3\u30af(<span class=\"sc_marker y\">None\u3092\u8fd4\u3059\u30e1\u30bd\u30c3\u30c9\u306e\u6a19\u6e96\u51fa\u529b\u7d50\u679c\u3092\u518d\u5229\u7528\u3059\u308b\u65b9\u6cd5<\/span>\uff09\u306b\u3064\u3044\u3066\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001<span class=\"sc_marker y\">\u4f55\u304b\u3057\u3089\u306e\u60c5\u5831\u3092\u6a19\u6e96\u51fa\u529b\u3057\u3066\u304f\u308c\u308b\u3051\u3069None\u3092Return\u3059\u308b\u3088\u3046\u306a\u6a19\u6e96\u30e1\u30bd\u30c3\u30c9<\/span>\u304c\u3042\u3063\u305f\u5834\u5408\u3001\u51fa\u529b\u7d50\u679c\u3092\u5909\u6570\u306b\u683c\u7d0d\u3057\u3066\u3082None\u304c\u8fd4\u3063\u3066\u304d\u3066\u3057\u307e\u3046\u306e\u3067\u3001\u51fa\u529b\u7d50\u679c\u3092\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u4e2d\u3067\u518d\u5229\u7528\u3059\u308b\u3068\u3044\u3063\u305f\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<p>\u3053\u308c\u3060\u3051\u3060\u3068\u3061\u3087\u3063\u3068\u30a4\u30e1\u30fc\u30b8\u3057\u3065\u3089\u3044\u304b\u3068\u601d\u3044\u307e\u3059\u306e\u3067\u3001\u5177\u4f53\u4f8b\u3067\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<p>pandas\u3067\u30c7\u30fc\u30bf\u30d5\u30ec\u30fc\u30e0\u306e\u7d71\u8a08\u30b5\u30de\u30ea\u30fc\u3092\u8868\u793a\u3057\u3066\u304f\u308c\u308b<span class=\"sc_marker y\">DataFrame.info\u30e1\u30bd\u30c3\u30c9<\/span>\u306f\u7686\u3055\u3093\u3082\u3088\u304f\u3054\u5b58\u3058\u3060\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<p><span class=\"sc_marker y\">info\u30e1\u30bd\u30c3\u30c9\u306f\u623b\u308a\u5024\u304cNone<\/span>\u306a\u306e\u3067\u3001\u51fa\u529b\u7d50\u679c\u3092\u5909\u6570\u306b\u4ee3\u5165\u3057\u3066\u3082None\u304c\u683c\u7d0d\u3055\u308c\u308b\u3060\u3051\u306a\u306e\u3067\u51fa\u529b\u7d50\u679c\u3092\u518d\u5229\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u4ee5\u4e0b\u306e\u3088\u3046\u306bDataFrame\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"font-size:16 toolbar-overlay:false toolbar-hide:false toolbar-delay:false show-title:false lang:python decode:true\">import pandas as pd\r\nimport numpy as np\r\ndf = pd.DataFrame({\r\n    'column_1': np.random.choice(['a', 'b', 'c'], 10 ** 2),\r\n    'column_2': np.random.choice(['a', 'b', 'c'], 10 ** 2),\r\n    'column_3': np.random.choice(['a', 'b', 'c'], 10 ** 2)\r\n    })\r\n<\/pre>\n<p>&nbsp;<\/p>\n<p>df.head()\u3092\u5b9f\u884c\u3059\u308b\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306bcolumn_1\uff5e3\u306f\u30e9\u30f3\u30c0\u30e0\u306ba,b,c\u304b\u3089\u9078\u629e\u3055\u308c\u305f\u30c7\u30fc\u30bf\u306b\u306a\u3063\u3066\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/sinyblog.com\/wp\/wp-content\/uploads\/2019\/07\/df_001.jpg\" alt=\"\" width=\"396\" height=\"260\" class=\"alignnone  wp-image-2753\" \/><\/p>\n<p>df.info()\u3092\u5b9f\u884c\u3059\u308b\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u30b5\u30de\u30ea\u30fc\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3088\u306d\u3002<\/p>\n<pre class=\"font-size:16 toolbar-overlay:false toolbar-hide:false toolbar-delay:false show-title:false lang:python decode:true\">df.info()\r\n\r\n#\u5b9f\u884c\u7d50\u679c\r\n&lt;class 'pandas.core.frame.DataFrame'&gt;\r\nRangeIndex: 100 entries, 0 to 99\r\nData columns (total 3 columns):\r\ncolumn_1    100 non-null object\r\ncolumn_2    100 non-null object\r\ncolumn_3    100 non-null object\r\ndtypes: object(3)\r\nmemory usage: 2.4+ KB<\/pre>\n<p>&nbsp;<\/p>\n<p>\u3053\u3053\u3067\u3001df.info()\u306e\u7d50\u679c\u3092\u5909\u6570\u306b\u5165\u308c\u3066\u8868\u793a\u3059\u308b\u3068\u30fb\u30fb\u30fb<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" data-src=\"https:\/\/sinyblog.com\/wp\/wp-content\/uploads\/2019\/07\/df_002.jpg\" alt=\"\" width=\"389\" height=\"281\" class=\"alignnone size-full wp-image-2754 lazyload\" \/><\/p>\n<p>\u4e0a\u8a18\u306e\u3088\u3046\u306b\u300c<span class=\"sc_marker y\">None<\/span>\u300d\u304c\u8fd4\u3063\u3066\u304d\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u306f\u3001<span class=\"sc_marker y\">pandas\u306einfo\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u304cNone\uff08\u4ed5\u69d8\uff09\u3067\u3042\u308b\u305f\u3081<\/span>\u3067\u3059\u3002<\/p>\n<p>&nbsp;<\/p>\n<div class=\"voice clearfix left n_bottom\">\n<div class=\"icon\"><img decoding=\"async\" data-src=\"https:\/\/sinyblog.com\/wp\/wp-content\/uploads\/2018\/12\/84cbb9ce41578193363ddea02fb77346.jpg\" class=\"lazyload\" \/><\/p>\n<div class=\"name\"><\/div>\n<\/div>\n<div class=\"text sc_balloon left green\">df.info()\u306e\u51fa\u529b\u7d50\u679c\u3092WEB\u753b\u9762\u306b\u8868\u793a\u3057\u305f\u3044\u3093\u3060\u3051\u3069\u306a\u30fb\u30fb\u30fb\u30fb<\/div>\n<\/div>\n<div><\/div>\n<div><\/div>\n<p>\u3053\u3093\u306a\u30b1\u30fc\u30b9\u3067\u306f\u3001<span class=\"sc_marker y\">io.StringIO<\/span>\u3092\u4f7f\u3046\u3053\u3068\u3067df.info()\u306e\u51fa\u529b\u7d50\u679c\u3092\u5909\u6570\u306b\u683c\u7d0d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>DataFrame.info\u306e\u51fa\u529b\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u3067sys.stdout\u306a\u306e\u3067\u3059\u304c\u3001buffer\u306b\u30d1\u30a4\u30d7\u51e6\u7406\u3059\u308b\u3053\u3068\u3067\u5909\u6570\u306b\u683c\u7d0d\u3057\u305f\u308a\u30d5\u30a1\u30a4\u30eb\u306b\u5185\u5bb9\u3092\u66f8\u304d\u8fbc\u3093\u3060\u308a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u5177\u4f53\u7684\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3067\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"font-size:16 toolbar-overlay:false toolbar-hide:false toolbar-delay:false show-title:false lang:python decode:true\">import io\r\nbuffer = io.StringIO()\r\ndf.info(buf=buffer)\r\ndf_info = buffer.getvalue().split(\"\\n\")\r\nfor i in df_info:\r\n    print(i)\r\n\r\n#\u5b9f\u884c\u7d50\u679c\r\n&lt;class 'pandas.core.frame.DataFrame'&gt;\r\nRangeIndex: 100 entries, 0 to 99\r\nData columns (total 3 columns):\r\ncolumn_1    100 non-null object\r\ncolumn_2    100 non-null object\r\ncolumn_3    100 non-null object\r\ndtypes: object(3)\r\nmemory usage: 2.4+ KB\r\n<\/pre>\n<p>&nbsp;<\/p>\n<p>\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u307f\u305f\u3051\u308c\u3070\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3059\u308c\u3070OK\u3067\u3059\u3002<\/p>\n<pre class=\"font-size:16 toolbar-overlay:false toolbar-hide:false toolbar-delay:false show-title:false lang:python decode:true\">with open(\"df_info.txt\", \"w\",encoding=\"utf-8\") as f:\r\n    f.write(df_info)<\/pre>\n<p>&nbsp;<\/p>\n<p>Django\u3067\u6a5f\u68b0\u5b66\u7fd2\u306e\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3092\u81ea\u4f5c\u3057\u3066\u3044\u308b\u306e\u3067\u3059\u304c\u3001\u5206\u6790\u5bfe\u8c61\u306e\u30c7\u30fc\u30bf\u30b5\u30de\u30ea\u30fc\u3092WEB\u753b\u9762\u306b\u8868\u793a\u3057\u305f\u3044\u3088\u3046\u306a\u30b1\u30fc\u30b9\u3067\u306f\u4eca\u56de\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u4f7f\u3046\u3053\u3068\u3067\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0a\u3001\u300c\u3010python\u3011pandas\u306e\u3061\u3087\u3063\u3068\u30de\u30cb\u30a2\u30c3\u30af\u306a\u4f7f\u3044\u65b9\u300d\u3067\u3057\u305f\u3002<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3053\u3093\u306b\u3061\u306f\u3002siny\u3067\u3059\u3002 \u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u3061\u3087\u3063\u3068\u30de\u30cb\u30a2\u30c3\u30af\u306apython\u306e\u30c6\u30af\u30cb\u30c3\u30af(None\u3092\u8fd4\u3059\u30e1\u30bd\u30c3\u30c9\u306e\u6a19\u6e96\u51fa\u529b\u7d50\u679c\u3092\u518d\u5229\u7528\u3059\u308b\u65b9\u6cd5\uff09\u306b\u3064\u3044\u3066\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002 \u4f8b\u3048\u3070\u3001\u4f55\u304b\u3057\u3089\u306e\u60c5\u5831\u3092\u6a19\u6e96\u51fa\u529b\u3057\u3066\u304f\u308c\u308b\u3051\u3069None\u2026<\/p>\n","protected":false},"author":1,"featured_media":1280,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[173,25],"class_list":["post-2752","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-python","tag-df-info","tag-python"],"_links":{"self":[{"href":"https:\/\/sinyblog.com\/wp-json\/wp\/v2\/posts\/2752","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sinyblog.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sinyblog.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sinyblog.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sinyblog.com\/wp-json\/wp\/v2\/comments?post=2752"}],"version-history":[{"count":11,"href":"https:\/\/sinyblog.com\/wp-json\/wp\/v2\/posts\/2752\/revisions"}],"predecessor-version":[{"id":2765,"href":"https:\/\/sinyblog.com\/wp-json\/wp\/v2\/posts\/2752\/revisions\/2765"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sinyblog.com\/wp-json\/wp\/v2\/media\/1280"}],"wp:attachment":[{"href":"https:\/\/sinyblog.com\/wp-json\/wp\/v2\/media?parent=2752"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sinyblog.com\/wp-json\/wp\/v2\/categories?post=2752"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sinyblog.com\/wp-json\/wp\/v2\/tags?post=2752"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}