{"id":3520,"date":"2022-10-17T19:02:54","date_gmt":"2022-10-17T10:02:54","guid":{"rendered":"https:\/\/417.run\/?p=3520"},"modified":"2022-10-17T19:03:04","modified_gmt":"2022-10-17T10:03:04","slug":"pandas-memo","status":"publish","type":"post","link":"https:\/\/417.run\/pg\/python\/pandas-memo\/","title":{"rendered":"pandas\u30e1\u30e2"},"content":{"rendered":"<h2>\u7279\u5b9a\u306e\u6761\u4ef6\u306b\u5408\u3046\u5834\u5408\u306b\u4ee3\u5165<\/h2>\n<p><code>title<\/code>\u306b<code>\u307b\u3052<\/code>\u304c\u3042\u308b\u884c\u306e<code>type<\/code>\u306b2\u3092\u4ee3\u5165\u3057\u307e\u3059<\/p>\n<pre><code class=\"language-python\">df.loc[df[&#039;title&#039;].str.contains(&#039;\u307b\u3052&#039;), &#039;type&#039;] = 2<\/code><\/pre>\n<h2>NaN\u3092\u62bd\u51fa<\/h2>\n<p>type\u304cNaN\u306e\u3082\u306e\u3092\u62bd\u51fa<\/p>\n<pre><code class=\"language-python\">df[df[&#039;type&#039;].isna()]<\/code><\/pre>\n<h2>\u8907\u6570CSV\u3092pandas\u306b\u8aad\u307f\u8fbc\u3080<\/h2>\n<pre><code class=\"language-python\">import pandas as pd\nimport glob\n\nall_files = glob.glob(&quot;.\/csv\/*.csv&quot;)\n\nli = []\n\nfor filename in all_files:\n    df = pd.read_csv(filename)\n    li.append(df)\n\ndf = pd.concat(li, axis=0, ignore_index=True)<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u7279\u5b9a\u306e\u6761\u4ef6\u306b\u5408\u3046\u5834\u5408\u306b\u4ee3\u5165 title\u306b\u307b\u3052\u304c\u3042\u308b\u884c\u306etype\u306b2\u3092\u4ee3\u5165\u3057\u307e\u3059 df.loc[df[&#039;title&#039;].str.contains(&#039;\u307b\u3052&#039;), &#039;type&#038; &#8230; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"class_list":{"0":"post-3520","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-python","7":"nothumb"},"_links":{"self":[{"href":"https:\/\/417.run\/wp-json\/wp\/v2\/posts\/3520"}],"collection":[{"href":"https:\/\/417.run\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/417.run\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/417.run\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/417.run\/wp-json\/wp\/v2\/comments?post=3520"}],"version-history":[{"count":2,"href":"https:\/\/417.run\/wp-json\/wp\/v2\/posts\/3520\/revisions"}],"predecessor-version":[{"id":3522,"href":"https:\/\/417.run\/wp-json\/wp\/v2\/posts\/3520\/revisions\/3522"}],"wp:attachment":[{"href":"https:\/\/417.run\/wp-json\/wp\/v2\/media?parent=3520"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/417.run\/wp-json\/wp\/v2\/categories?post=3520"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/417.run\/wp-json\/wp\/v2\/tags?post=3520"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}