{"id":2877,"date":"2021-04-16T12:34:07","date_gmt":"2021-04-16T03:34:07","guid":{"rendered":"https:\/\/qol-kk.com\/wp2\/?p=2877"},"modified":"2021-04-16T12:34:07","modified_gmt":"2021-04-16T03:34:07","slug":"post-2877","status":"publish","type":"post","link":"https:\/\/qol-kk.com\/wp2\/blog\/2021\/04\/16\/post-2877\/","title":{"rendered":"Django\uff1aDataFrame\u3092\u914d\u5217(\u30ea\u30b9\u30c8)\u306b\u3057\u3066DB\u306b\u683c\u7d0d\u3059\u308b\u6642\u306e\u6ce8\u610f\u4e8b\u9805"},"content":{"rendered":"<h2>Django\uff1aDataFrame\u3092\u914d\u5217(\u30ea\u30b9\u30c8)\u306b\u3057\u3066DB\u306b\u683c\u7d0d\u3059\u308b\u6642\u306e\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>CSV\u30c7\u30fc\u30bf\u3092DB\u306b\u53d6\u308a\u8fbc\u3080\u6642\u3069\u3046\u3057\u3066\u307e\u3059\u304b\u3002<br \/>\nCSV\u306e\u69cb\u9020\u3092\u305d\u306e\u307e\u307e\uff08\u8a08\u7b97\u51e6\u7406\u3068\u5316\u3057\u306a\u3044\u3067\uff09DB\u306b\u6301\u3063\u3066\u3044\u304f\u306e\u3067\u3042\u308c\u3070\u3001DataFrame\u306b\u683c\u7d0d\u3057\u3066\u3010to_sql\u3011\u3067\u6295\u3052\u3066\u3057\u307e\u3046\u306e\u304c\u4e00\u756a\u7c21\u5358\u3067\u3059\u3002\u304c\u3001\u4eca\u56de\u306fDataFrame\u5316\u3057\u305f\u5024\u3092\u30ea\u30b9\u30c8\u3067\u5f15\u304d\u53d6\u3063\u3066\u8a08\u7b97\u3057\u3066\u7d71\u5236\u3057\u3066DB\u306bSave\u3059\u308b\u3068\u3044\u3046\u9762\u5012\u306a\u6bb5\u53d6\u308a\u3092\u8e0f\u3093\u3060\u6642\u306e\u6ce8\u610f\u4e8b\u9805\u3067\u3059\u3002<\/p>\n<h3>\u554f\u984c\u306fDataFrame\u306b\u683c\u7d0d\u3057\u305f\u3068\u304d\u306b\u767a\u751f\u3057\u3066\u3044\u308b<\/h3>\n<p>DataFrame\u306b\u683c\u7d0d\u3059\u308b\u3068\u4e0b\u8a182\u70b9\u306e\u554f\u984c\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n<div class=\"borderBox\">\n<ol>\n<li>\u30d5\u30a3\u30fc\u30eb\u30c9\u578b\u304c\u52dd\u624b\u306b\u5272\u308a\u632f\u3089\u308c\u308b \u203bint \u306b\u3057\u305f\u3044\u306e\u306b float \u306b\u306a\u3063\u305f\u308a\u306a\u3069<\/li>\n<li>\u7a7a\u767d\u306bnan\u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u308b<\/li>\n<\/ol>\n<\/div>\n<h3>\u30d5\u30a3\u30fc\u30eb\u30c9\u578b\u304c\u52dd\u624b\u306b\u5272\u308a\u632f\u3089\u308c\u308b<\/h3>\n<p>\u4f8b\u3048\u3070JAN\u30b3\u30fc\u30c9\u306e\u5217\u304c\u5b58\u5728\u3057\u3066\u3044\u305f\u5834\u5408\u3001\u3053\u306e\u5217\u306f\u9ad8\u78ba\u7387\u3067float \u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u307e\u3059\u3002<\/p>\n<p>CSV\u30c7\u30fc\u30bf\u306e\u4e2d\u3067\u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u3067\u56f2\u3063\u3066\u3044\u308b\u5834\u5408\u306f\u3053\u306e\u9650\u308a\u3067\u306f\u306a\u3044\u306e\u3067\u3059\u304c\u300113\u6841\u306e\u6570\u5b57\u306e\u307f\u3067\u3042\u3063\u305f\u5834\u5408\u3001\u79c1\u306e\u5b9f\u9a13\u3067\u306f100\uff05 float\u3068\u306a\u308a\u307e\u3057\u305f\u3002JAN\u306e\u304a\u5c3b\u306b\u3010.0\u3011\u304c\u4ed8\u3044\u3066\u3044\u308b\u3068\u8a00\u3046\u4e0d\u601d\u8b70\u306a\u69cb\u6210\u3067\u3059\u3002<\/p>\n<p>\u3053\u308c\u3092\u89e3\u6c7a\u3059\u308b\u306b\u306f\u3001pd.read_csv \u5b9f\u884c\u306e\u969b\u306bdtype\u3092\u6307\u5b9a\u3057\u3066\u3042\u3052\u307e\u3059\u3002<\/p>\n<pre class=\"\">import pandas as pd\r\n\r\nfile = \"hoge.csv\"\r\nencode = \"\"\r\nhead = 0\r\ndtype = {'\u65e5\u4ed8':'object','\u7dcf\u58f2\u4e0a':'int','\u901a\u5e38\u8cfc\u5165':'int','\u30a2\u30af\u30bb\u30b9\u4eba\u6570':'int','\u5ba2\u5358\u4fa1':'float','\u8ee2\u63db\u7387':'float'}\r\n\r\n# CSV\u8aad\u8fbc\u307f\r\ndf = pd.read_csv(file, encoding=encode, header=head, dtype=dtype)\r\n\r\nprint df<\/pre>\n<p>dtype\u306f\u8f9e\u66f8\u578b\u3067\u4f5c\u6210\u3057\u3066\u914d\u7f6e\u3057\u307e\u3059\u3002<br \/>\n\u8981\u7d20\u540d\u3068\u8981\u7d20\u6570\u304c\u72b6\u6cc1\u306b\u3088\u3063\u3066\u5909\u308f\u308b\u5834\u5408\u306f if\u3067\u72b6\u6cc1\u5206\u985e\u3092\u3059\u308b\u65b9\u6cd5\u4ee5\u5916\u306b\u3053\u3093\u306a\u624b\u6bb5\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"\">import pandas as pd\r\n\r\nfile = \"hoge.csv\"\r\nencode = \"\"\r\nhead = 0\r\n\r\n# CSV\u8aad\u8fbc\u307f\r\ndf = pd.read_csv(file, encoding=encode, header=head, dtype='object')\r\n\r\nprint df<\/pre>\n<p>\u8f9e\u66f8\u578b\u3092\u914d\u7f6e\u305b\u305a\u306bobject\u3068\u3060\u3051\u8a18\u8f09\u3057\u307e\u3057\u305f\u3002<br \/>\n\u3053\u3046\u3059\u308b\u4e8b\u3067\u3001\u3059\u3079\u3066\u306e\u5024\u3092\u4e00\u5ea6\u6587\u5b57\u5217\u3068\u3057\u3066\u6240\u5f97\u3057\u683c\u7d0d\u3059\u307e\u3059\u3002<br \/>\n\u305d\u306e\u5f8c .astype(float) \u306a\u3069\u3067\u9069\u5207\u306a\u578b\u306b\u5909\u66f4\u3059\u308c\u3070\u3001\u8981\u7d20\u6570\u306e\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u4e0d\u8981\u3068\u306a\u308a\u95a2\u6570\u3092\u5916\u306b\u914d\u7f6e\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<h3>\u7a7a\u767d\u306bnan\u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u308b<\/h3>\n<p>DataFrame\u306f\u4f55\u3082\u3057\u306a\u3051\u308c\u3070\u30c7\u30fc\u30bf\u6b20\u640d\u3092nan\u3067\u57cb\u3081\u3066\u304f\u308c\u307e\u3059\u3002<br \/>\n\u3067\u3082\u3001DataFrame\u3092\u30ea\u30b9\u30c8\u306b\u5909\u63db\u3059\u308b\u3068nan\u3068\u3044\u3046\u5024\u304c\u5165\u3063\u305f\u30ab\u30e9\u30e0\u304c\u51fa\u6765\u4e0a\u304c\u308a\u307e\u3059\u3002<br \/>\n\u30c6\u30ad\u30b9\u30c8\u4e0a\u3067\u306f2\u3064\u306e\u56de\u907f\u65b9\u6cd5\uff08\u6b20\u640d\u5024\u306e\u7a74\u57cb\u3081\u65b9\u6cd5\uff09\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<div class=\"borderBox\">\n<ol>\n<li>na_values \u306e\u8a2d\u5b9a<\/li>\n<li>df.fillna()\u306e\u5229\u7528<\/li>\n<\/ol>\n<\/div>\n<h4>na_values \u306e\u8a2d\u5b9a<\/h4>\n<pre class=\"lang:default decode:true\"># CSV\u8aad\u8fbc\u307f\r\ndf = pd.read_csv(file, encoding=encode, header=head, dtype=dtype, na_values='--')<\/pre>\n<p>pandas.read.csv \u306e\u5b9f\u884c\u6642\u306b na_values \u306e\u8a2d\u5b9a\u3092\u3059\u308b\u306e\u3067\u3059\u304c\u3001\u79c1\u306e\u74b0\u5883\u3067\u306f\u306a\u305c\u304b\u52d5\u4f5c\u3057\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/p>\n<h4>df.fillna()\u306e\u5229\u7528<\/h4>\n<pre class=\"lang:default decode:true\"># CSV\u8aad\u8fbc\u307f\r\ndf = pd.read_csv(file, encoding=encode, header=head, dtype=dtype)\r\n\r\ndata = df.fillna('--')<\/pre>\n<p>fillna\u30b3\u30de\u30f3\u30c9\u306f nan \u306e\u5024\u306b\u6307\u793a\u3057\u305f\u5024\u3092\u7f6e\u63db\u3057\u3066\u304f\u308c\u307e\u3059\u3002<br \/>\ndf = df.fillna('--') \u3068\u66f8\u3044\u3066\u3057\u307e\u3046\u3068\u5927\u672c\u306e\u5909\u6570df \u3092\u7f6e\u63db\u3067\u304d\u305a\u3010 nan \u3011\u304c\u8868\u793a\u3055\u308c\u7d9a\u3051\u307e\u3059\u306e\u3067\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3>\u30a8\u30e9\u30fc\uff1aMust specify a fill 'value' or 'method'.<\/h3>\n<p>\u4eca\u56de\u306e\u8a18\u4e8b\u3092\u8a18\u8f09\u3057\u3088\u3046\u3068\u601d\u3063\u305f\u5207\u3063\u639b\u3051\u3067\u3059\u3002<br \/>\n\u30c1\u30e7\u30c3\u30c8\u8003\u3048\u308c\u3070\u5206\u304b\u308b\u306e\u3067\u3059\u304c\u3001DataFrame\u3067\u306fNull\u3082None\u3082\u6b20\u640d\u5024\u306e\u8a18\u53f7\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<br \/>\nDataFrame\u306e\u6b20\u640d\u5024\u306f\u3042\u304f\u307e\u3067\u3082nan\u304c\u8a18\u53f7\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u3064\u307e\u308a\u3053\u3093\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u3057\u307e\u3046\u3068\u4e0a\u306e\u30a8\u30e9\u30fc\uff08Must specify a fill 'value' or 'method'.\uff09\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\"># CSV\u8aad\u8fbc\u307f\r\ndf = pd.read_csv(file, encoding=encode, header=head, dtype=dtype)\r\n\r\ndata = df.fillna(None)<\/pre>\n<p>\u305d\u306e\u305f\u3081DataFrame\u306b\u683c\u7d0d\u3057\u305f\u5024\u3092\u30ea\u30b9\u30c8\u5316\u3057\u305f\u5834\u5408\u3001\u9ad8\u78ba\u7387\u3067\u6b20\u640d\u5024\u306b\u306f\u3010nan\u3011\u304c\u5165\u3063\u3066\u3044\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h4>\u6307\u5b9a\u30ab\u30e9\u30e0\u306bnan\u304c\u5165\u3063\u3066\u3044\u308b\u5834\u5408None\u306b\u7f6e\u304d\u63db\u3048\u3066DB\u306b\u6e21\u305b\u3070DB\u5074\u3067NULL\u3092\u767b\u9332\u3067\u304d\u308b<\/h4>\n<p>\u5834\u5408\u5206\u3051\u306a\u306e\u3067IF\u6587\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"\"># nan \u304c\u5165\u308b\u30ab\u30e9\u30e0\u756a\u53f7\u3092\u30ea\u30b9\u30c8\u306b\u8a18\u8f09\r\nlist = [3,4,5,6]\r\n\r\n#nan\u3092None\u306b\u5909\u63db\r\nfor li in list:\r\n  if str(data[li]) == 'nan':\r\n    data[li] = None<\/pre>\n<h4>\u6ce8\u76ee\u30dd\u30a4\u30f3\u30c8\u306f6\u884c\u76ee\u3010 str(data[li]) == 'nan' \u3011<\/h4>\n<p>\u3064\u3044\u3064\u3044\u3010data[li] == 'nan' \u3011\u3068\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u304c\u3001DataFrame\u4e0a\u3067\u8a72\u5f53\u306e\u5024\u306f \u300enan\u300f\u3068\u306a\u3063\u3066\u304a\u308a\u300e'nan'\u300f\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u305d\u306e\u305f\u3081\u3010 .tolist() \u3011\u3067\u30ea\u30b9\u30c8\u5316\u3057\u305f\u5024\u3082\u300enan\u300f\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<br \/>\n\u3064\u307e\u308a\u3010data[li] == 'nan' \u3011\u3067\u306f\u4e00\u81f4\u304c\u767a\u751f\u3057\u307e\u305b\u3093\u3002<\/p>\n<p>\u4e00\u81f4\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306b\u306fdata[li] \u306bstr()\u3092\u639b\u3051\u3066\u6587\u5b57\u5217\u306b\u3057\u305f\u3046\u3048\u3067 == 'nan' \u3067if\u306b\u639b\u3051\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\n\u30c1\u30e7\u30c3\u30c8\u3057\u305f\u4e8b\u306a\u3093\u3067\u3059\u3051\u3069\u3001\u5fd8\u308c\u304c\u3061\u306a\u3093\u3067\u3059\u3088\u306d\u3002<\/p>\n<h3>\u307e\u3068\u3081<\/h3>\n<p>\u4eca\u56de\u306e\u4f8b\u306e\u3088\u3046\u306aNan\u3092MySQL\u306e\u6570\u5024\u30ab\u30e9\u30e0\u306b\u6e21\u3057\u3066\u3057\u307e\u3063\u305f\u5834\u5408\u3001100%\u30a8\u30e9\u30fc\u3067\u3059\u3002<br \/>\n\uff08\u6587\u5b57\u5217\u306e\u69d8\u306b\u767b\u9332\u306f\u3057\u3066\u304f\u308c\u307e\u305b\u3093\uff09<\/p>\n<p>\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u5f04\u3063\u3066\u3044\u3066\u9762\u5012\u306a\u306e\u306f\u5927\u4f53\u3010\u6b20\u640d\u51e6\u7406\u3011\u3010NULL\u306e\u51e6\u7406\u3011\u3010\u65e5\u4ed8\u51e6\u7406\u3011\u3067\u3059\u3002<br \/>\n\u3053\u308c\u3092\u77e5\u3063\u3066\u3044\u308c\u3070\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u306f\u6016\u304f\u306a\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Django\uff1aDataFrame\u3092\u914d\u5217(\u30ea\u30b9\u30c8)\u306b\u3057\u3066DB\u306b\u683c\u7d0d\u3059\u308b\u6642\u306e\u6ce8\u610f\u4e8b\u9805 CSV\u30c7\u30fc\u30bf\u3092DB\u306b\u53d6\u308a\u8fbc\u3080\u6642\u3069\u3046\u3057\u3066\u307e\u3059\u304b\u3002 CSV\u306e\u69cb\u9020\u3092\u305d\u306e\u307e\u307e\uff08\u8a08\u7b97\u51e6\u7406\u3068\u5316\u3057\u306a\u3044\u3067\uff09DB\u306b\u6301\u3063\u3066\u3044\u304f\u306e\u3067\u3042\u308c\u3070\u3001DataFram [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2174,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"sns_share_botton_hide":"","vkExUnit_sns_title":"","_vk_print_noindex":"","sitemap_hide":"","_veu_custom_css":"","veu_display_promotion_alert":"","vkexunit_cta_each_option":"","_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[38],"tags":[814,99,147,97,53,45],"class_list":["post-2877","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-python-memorandum","tag-django","tag-mysql","tag-python","tag-97","tag-53","tag-45"],"veu_head_title_object":{"title":"","add_site_title":""},"jetpack_publicize_connections":[],"jetpack-related-posts":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/qol-kk.com\/wp2\/wp-content\/uploads\/2020\/11\/django.png","_links":{"self":[{"href":"https:\/\/qol-kk.com\/wp2\/wp-json\/wp\/v2\/posts\/2877","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/qol-kk.com\/wp2\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/qol-kk.com\/wp2\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/qol-kk.com\/wp2\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/qol-kk.com\/wp2\/wp-json\/wp\/v2\/comments?post=2877"}],"version-history":[{"count":0,"href":"https:\/\/qol-kk.com\/wp2\/wp-json\/wp\/v2\/posts\/2877\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/qol-kk.com\/wp2\/wp-json\/wp\/v2\/media\/2174"}],"wp:attachment":[{"href":"https:\/\/qol-kk.com\/wp2\/wp-json\/wp\/v2\/media?parent=2877"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qol-kk.com\/wp2\/wp-json\/wp\/v2\/categories?post=2877"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qol-kk.com\/wp2\/wp-json\/wp\/v2\/tags?post=2877"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}