{"id":3006,"date":"2023-07-19T16:28:39","date_gmt":"2023-07-19T16:28:39","guid":{"rendered":"https:\/\/statorials.org\/cn\/pandas-groupby-%e5%88%b0%e6%95%b0%e6%8d%ae%e6%a1%86\/"},"modified":"2023-07-19T16:28:39","modified_gmt":"2023-07-19T16:28:39","slug":"pandas-groupby-%e5%88%b0%e6%95%b0%e6%8d%ae%e6%a1%86","status":"publish","type":"post","link":"https:\/\/statorials.org\/cn\/pandas-groupby-%e5%88%b0%e6%95%b0%e6%8d%ae%e6%a1%86\/","title":{"rendered":"\u5982\u4f55\u5c06 pandas groupby \u8f93\u51fa\u8f6c\u6362\u4e3a dataframe"},"content":{"rendered":"

<\/p>\n

\n

\u672c\u6559\u7a0b\u4ecb\u7ecd\u5982\u4f55\u5c06 pandas GroupBy \u7684\u8f93\u51fa\u8f6c\u6362\u4e3a pandas DataFrame\u3002<\/span><\/p>\n

\u793a\u4f8b\uff1a\u5c06 Pandas GroupBy \u8f93\u51fa\u8f6c\u6362\u4e3a DataFrame<\/strong><\/span><\/h3>\n

\u5047\u8bbe\u6211\u4eec\u6709\u4ee5\u4e0b pandas DataFrame\uff0c\u663e\u793a\u6765\u81ea\u4e0d\u540c\u7403\u961f\u7684\u7bee\u7403\u8fd0\u52a8\u5458\u7684\u5f97\u5206\uff1a<\/span><\/p>\n

 import<\/span> pandas as<\/span> pd\n\n#createDataFrame\n<\/span>df = pd. DataFrame<\/span> ({' team<\/span> ': ['A', 'A', 'A', 'A', 'B', 'B', 'B', 'B'],\n                   ' position<\/span> ': ['G', 'G', 'F', 'C', 'G', 'F', 'F', 'F'],\n                   ' points<\/span> ': [5, 7, 7, 10, 12, 22, 15, 10]})\n\n#view DataFrame<\/span>\nprint<\/span> (df)\n\n  team position points\n0 AG 5\n1 AG 7\n2AF 7\n3 AC 10\n4 BG 12\n5 BF 22\n6 BF 15\n7 BF 10\n<\/strong><\/span><\/pre>\n
\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\u6765\u8ba1\u7b97\u6309\u56e2\u961f<\/strong>\u548c\u4f4d\u7f6e<\/strong>\u5206\u7ec4\u7684\u73a9\u5bb6\u6570\u91cf\uff1a<\/span><\/p>\n
 #count number of players, grouped by team and position\ngroup = df. groupby<\/span> ([' team<\/span> ', ' position<\/span> ']). size<\/span> ()\n<\/span>\n#viewoutput\nprint<\/span> (group)\n\nteam position\nAC 1\n      F 1\n      G2\nBF 3\n      G 1\ndtype: int64\n<\/span><\/span><\/strong><\/pre>\n
\u4ece\u8f93\u51fa\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u6309\u7403\u961f<\/strong>\u548c\u4f4d\u7f6e<\/strong>\u5206\u7ec4\u7684\u7403\u5458\u603b\u6570\u3002<\/span><\/p>\n
\u4f46\u662f\uff0c\u5047\u8bbe\u6211\u4eec\u5e0c\u671b\u8f93\u51fa\u5728\u6bcf\u4e00\u884c\u4e2d\u663e\u793a\u56e2\u961f\u540d\u79f0\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/span><\/p>\n
 team position count\n0 AC 1\n1 AF 1\n2 AG 2\n3 BF 3\n4 BG 1\n<\/strong><\/span><\/pre>\n
\u4e3a\u4e86\u8fbe\u5230\u8fd9\u4e2a\u7ed3\u679c\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u8fd0\u884c GroupBy \u65f6\u7b80\u5355\u5730\u4f7f\u7528reset_index()<\/strong> \uff1a<\/span><\/p>\n
 #count number of players, grouped by team and position\n<\/span>df_out = df. groupby<\/span> ([' team<\/span> ', ' position<\/span> ']). size<\/span> (). reset_index<\/span> (name=' count<\/span> ')\n\n#viewoutput\n<\/span>print<\/span> (df_out)\n\n  team position count\n0 AC 1\n1 AF 1\n2 AG 2\n3 BF 3\n4 BG 1\n<\/strong><\/span><\/pre>\n
\u8f93\u51fa\u73b0\u5728\u4ee5\u6240\u9700\u7684\u683c\u5f0f\u663e\u793a\u3002<\/span><\/span><\/p>\n
\u8bf7\u6ce8\u610f\uff0c reset_index()<\/strong>\u4e2d\u7684name<\/strong>\u53c2\u6570\u6307\u5b9a GroupBy \u751f\u6210\u7684\u65b0\u5217\u7684\u540d\u79f0\u3002<\/span><\/p>\n
\u6211\u4eec\u8fd8\u53ef\u4ee5\u786e\u8ba4\u7ed3\u679c\u786e\u5b9e\u662f\u4e00\u4e2a pandas DataFrame\uff1a<\/span><\/span><\/p>\n
 #display object type of df_out\n<\/span>type<\/span> (df_out)\n\npandas.core.frame.DataFrame\n<\/strong><\/span><\/pre>\n
\u6ce8\u610f<\/strong>\uff1a\u60a8\u53ef\u4ee5\u5728\u6b64\u5904<\/a>\u627e\u5230 pandas \u4e2d GroupBy \u64cd\u4f5c\u7684\u5b8c\u6574\u6587\u6863\u3002<\/span><\/p>\n
\u5176\u4ed6\u8d44\u6e90<\/strong><\/span><\/h3>\n
\u4ee5\u4e0b\u6559\u7a0b\u89e3\u91ca\u4e86\u5982\u4f55\u5728 pandas \u4e2d\u6267\u884c\u5176\u4ed6\u5e38\u89c1\u64cd\u4f5c\uff1a<\/span><\/p>\n
 Pandas\uff1a\u5982\u4f55\u8ba1\u7b97\u6bcf\u7ec4\u7684\u7d2f\u8ba1\u548c<\/a>
Pandas\uff1a\u5982\u4f55\u6309\u7ec4\u8ba1\u7b97\u552f\u4e00\u503c<\/a>
Pandas\uff1a\u5982\u4f55\u6309\u7ec4\u8ba1\u7b97\u76f8\u5173\u6027<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
\u672c\u6559\u7a0b\u4ecb\u7ecd\u5982\u4f55\u5c06 pandas GroupBy \u7684\u8f93\u51fa\u8f6c\u6362\u4e3a pandas DataFrame\u3002 \u793a\u4f8b\uff1a\u5c06 P […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-3006","post","type-post","status-publish","format-standard","hentry","category-11"],"yoast_head":"\n\u5982\u4f55\u5c06 Pandas GroupBy \u8f93\u51fa\u8f6c\u6362\u4e3a DataFrame - Statorials<\/title>\n<meta name=\"description\" content=\"\u672c\u6559\u7a0b\u901a\u8fc7\u4e00\u4e2a\u793a\u4f8b\u89e3\u91ca\u4e86\u5982\u4f55\u5c06 pandas GroupBy \u5bf9\u8c61\u8f6c\u6362\u4e3a pandas DataFrame\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/statorials.org\/cn\/pandas-groupby-\u5230\u6570\u636e\u6846\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u5982\u4f55\u5c06 Pandas GroupBy \u8f93\u51fa\u8f6c\u6362\u4e3a DataFrame - Statorials\" \/>\n<meta property=\"og:description\" content=\"\u672c\u6559\u7a0b\u901a\u8fc7\u4e00\u4e2a\u793a\u4f8b\u89e3\u91ca\u4e86\u5982\u4f55\u5c06 pandas GroupBy \u5bf9\u8c61\u8f6c\u6362\u4e3a pandas DataFrame\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/cn\/pandas-groupby-\u5230\u6570\u636e\u6846\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-19T16:28:39+00:00\" \/>\n<meta name=\"author\" content=\"\u672c\u6770\u660e\u00b7\u5b89\u5fb7\u68ee\u535a\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u672c\u6770\u660e\u00b7\u5b89\u5fb7\u68ee\u535a\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/cn\/pandas-groupby-%e5%88%b0%e6%95%b0%e6%8d%ae%e6%a1%86\/\",\"url\":\"https:\/\/statorials.org\/cn\/pandas-groupby-%e5%88%b0%e6%95%b0%e6%8d%ae%e6%a1%86\/\",\"name\":\"\u5982\u4f55\u5c06 Pandas GroupBy \u8f93\u51fa\u8f6c\u6362\u4e3a DataFrame - Statorials\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/cn\/#website\"},\"datePublished\":\"2023-07-19T16:28:39+00:00\",\"dateModified\":\"2023-07-19T16:28:39+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/cn\/#\/schema\/person\/124e4e5b7c9f8dc0f1f95cc8c1db3261\"},\"description\":\"\u672c\u6559\u7a0b\u901a\u8fc7\u4e00\u4e2a\u793a\u4f8b\u89e3\u91ca\u4e86\u5982\u4f55\u5c06 pandas GroupBy \u5bf9\u8c61\u8f6c\u6362\u4e3a pandas DataFrame\u3002\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/cn\/pandas-groupby-%e5%88%b0%e6%95%b0%e6%8d%ae%e6%a1%86\/#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/cn\/pandas-groupby-%e5%88%b0%e6%95%b0%e6%8d%ae%e6%a1%86\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/cn\/pandas-groupby-%e5%88%b0%e6%95%b0%e6%8d%ae%e6%a1%86\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u5bb6\",\"item\":\"https:\/\/statorials.org\/cn\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u5982\u4f55\u5c06 pandas groupby \u8f93\u51fa\u8f6c\u6362\u4e3a dataframe\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/statorials.org\/cn\/#website\",\"url\":\"https:\/\/statorials.org\/cn\/\",\"name\":\"Statorials\",\"description\":\"\u60a8\u7684\u7edf\u8ba1\u7d20\u517b\u6307\u5357\uff01\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/statorials.org\/cn\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/statorials.org\/cn\/#\/schema\/person\/124e4e5b7c9f8dc0f1f95cc8c1db3261\",\"name\":\"\u672c\u6770\u660e\u00b7\u5b89\u5fb7\u68ee\u535a\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/statorials.org\/cn\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/statorials.org\/cn\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg\",\"contentUrl\":\"https:\/\/statorials.org\/cn\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg\",\"caption\":\"\u672c\u6770\u660e\u00b7\u5b89\u5fb7\u68ee\u535a\"},\"description\":\"\u5927\u5bb6\u597d\uff0c\u6211\u662f\u672c\u6770\u660e\uff0c\u4e00\u4f4d\u9000\u4f11\u7684\u7edf\u8ba1\u5b66\u6559\u6388\uff0c\u540e\u6765\u6210\u4e3a Statorials \u7684\u70ed\u5fc3\u6559\u5e08\u3002 \u51ed\u501f\u5728\u7edf\u8ba1\u9886\u57df\u7684\u4e30\u5bcc\u7ecf\u9a8c\u548c\u4e13\u4e1a\u77e5\u8bc6\uff0c\u6211\u6e34\u671b\u5206\u4eab\u6211\u7684\u77e5\u8bc6\uff0c\u901a\u8fc7 Statorials \u589e\u5f3a\u5b66\u751f\u7684\u80fd\u529b\u3002\u4e86\u89e3\u66f4\u591a\",\"sameAs\":[\"https:\/\/statorials.org\/cn\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"\u5982\u4f55\u5c06 Pandas GroupBy \u8f93\u51fa\u8f6c\u6362\u4e3a DataFrame - Statorials","description":"\u672c\u6559\u7a0b\u901a\u8fc7\u4e00\u4e2a\u793a\u4f8b\u89e3\u91ca\u4e86\u5982\u4f55\u5c06 pandas GroupBy \u5bf9\u8c61\u8f6c\u6362\u4e3a pandas DataFrame\u3002","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/statorials.org\/cn\/pandas-groupby-\u5230\u6570\u636e\u6846\/","og_locale":"zh_CN","og_type":"article","og_title":"\u5982\u4f55\u5c06 Pandas GroupBy \u8f93\u51fa\u8f6c\u6362\u4e3a DataFrame - Statorials","og_description":"\u672c\u6559\u7a0b\u901a\u8fc7\u4e00\u4e2a\u793a\u4f8b\u89e3\u91ca\u4e86\u5982\u4f55\u5c06 pandas GroupBy \u5bf9\u8c61\u8f6c\u6362\u4e3a pandas DataFrame\u3002","og_url":"https:\/\/statorials.org\/cn\/pandas-groupby-\u5230\u6570\u636e\u6846\/","og_site_name":"Statorials","article_published_time":"2023-07-19T16:28:39+00:00","author":"\u672c\u6770\u660e\u00b7\u5b89\u5fb7\u68ee\u535a","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"\u672c\u6770\u660e\u00b7\u5b89\u5fb7\u68ee\u535a","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"1 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/statorials.org\/cn\/pandas-groupby-%e5%88%b0%e6%95%b0%e6%8d%ae%e6%a1%86\/","url":"https:\/\/statorials.org\/cn\/pandas-groupby-%e5%88%b0%e6%95%b0%e6%8d%ae%e6%a1%86\/","name":"\u5982\u4f55\u5c06 Pandas GroupBy \u8f93\u51fa\u8f6c\u6362\u4e3a DataFrame - Statorials","isPartOf":{"@id":"https:\/\/statorials.org\/cn\/#website"},"datePublished":"2023-07-19T16:28:39+00:00","dateModified":"2023-07-19T16:28:39+00:00","author":{"@id":"https:\/\/statorials.org\/cn\/#\/schema\/person\/124e4e5b7c9f8dc0f1f95cc8c1db3261"},"description":"\u672c\u6559\u7a0b\u901a\u8fc7\u4e00\u4e2a\u793a\u4f8b\u89e3\u91ca\u4e86\u5982\u4f55\u5c06 pandas GroupBy \u5bf9\u8c61\u8f6c\u6362\u4e3a pandas DataFrame\u3002","breadcrumb":{"@id":"https:\/\/statorials.org\/cn\/pandas-groupby-%e5%88%b0%e6%95%b0%e6%8d%ae%e6%a1%86\/#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/statorials.org\/cn\/pandas-groupby-%e5%88%b0%e6%95%b0%e6%8d%ae%e6%a1%86\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/statorials.org\/cn\/pandas-groupby-%e5%88%b0%e6%95%b0%e6%8d%ae%e6%a1%86\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u5bb6","item":"https:\/\/statorials.org\/cn\/"},{"@type":"ListItem","position":2,"name":"\u5982\u4f55\u5c06 pandas groupby \u8f93\u51fa\u8f6c\u6362\u4e3a dataframe"}]},{"@type":"WebSite","@id":"https:\/\/statorials.org\/cn\/#website","url":"https:\/\/statorials.org\/cn\/","name":"Statorials","description":"\u60a8\u7684\u7edf\u8ba1\u7d20\u517b\u6307\u5357\uff01","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/statorials.org\/cn\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/statorials.org\/cn\/#\/schema\/person\/124e4e5b7c9f8dc0f1f95cc8c1db3261","name":"\u672c\u6770\u660e\u00b7\u5b89\u5fb7\u68ee\u535a","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/statorials.org\/cn\/#\/schema\/person\/image\/","url":"https:\/\/statorials.org\/cn\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg","contentUrl":"https:\/\/statorials.org\/cn\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg","caption":"\u672c\u6770\u660e\u00b7\u5b89\u5fb7\u68ee\u535a"},"description":"\u5927\u5bb6\u597d\uff0c\u6211\u662f\u672c\u6770\u660e\uff0c\u4e00\u4f4d\u9000\u4f11\u7684\u7edf\u8ba1\u5b66\u6559\u6388\uff0c\u540e\u6765\u6210\u4e3a Statorials \u7684\u70ed\u5fc3\u6559\u5e08\u3002 \u51ed\u501f\u5728\u7edf\u8ba1\u9886\u57df\u7684\u4e30\u5bcc\u7ecf\u9a8c\u548c\u4e13\u4e1a\u77e5\u8bc6\uff0c\u6211\u6e34\u671b\u5206\u4eab\u6211\u7684\u77e5\u8bc6\uff0c\u901a\u8fc7 Statorials \u589e\u5f3a\u5b66\u751f\u7684\u80fd\u529b\u3002\u4e86\u89e3\u66f4\u591a","sameAs":["https:\/\/statorials.org\/cn"]}]}},"yoast_meta":{"yoast_wpseo_title":"","yoast_wpseo_metadesc":"","yoast_wpseo_canonical":""},"_links":{"self":[{"href":"https:\/\/statorials.org\/cn\/wp-json\/wp\/v2\/posts\/3006","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/statorials.org\/cn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/statorials.org\/cn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/statorials.org\/cn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/statorials.org\/cn\/wp-json\/wp\/v2\/comments?post=3006"}],"version-history":[{"count":0,"href":"https:\/\/statorials.org\/cn\/wp-json\/wp\/v2\/posts\/3006\/revisions"}],"wp:attachment":[{"href":"https:\/\/statorials.org\/cn\/wp-json\/wp\/v2\/media?parent=3006"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/statorials.org\/cn\/wp-json\/wp\/v2\/categories?post=3006"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/statorials.org\/cn\/wp-json\/wp\/v2\/tags?post=3006"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}