{"id":1926,"date":"2023-07-24T10:24:52","date_gmt":"2023-07-24T10:24:52","guid":{"rendered":"https:\/\/statorials.org\/pl\/pandy-iteruja-po-kolumnach-ramki-danych\/"},"modified":"2023-07-24T10:24:52","modified_gmt":"2023-07-24T10:24:52","slug":"pandy-iteruja-po-kolumnach-ramki-danych","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/pandy-iteruja-po-kolumnach-ramki-danych\/","title":{"rendered":"Jak przegl\u0105da\u0107 kolumny w pandas dataframe"},"content":{"rendered":"

<\/p>\n

\n

Do iteracji po kolumnach ramki DataFrame pandy mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cej podstawowej sk\u0142adni:<\/span><\/p>\n

 for name, values in<\/span> df. iteritems<\/span> ():\n  print<\/span> (values)\n<\/span><\/span><\/strong><\/pre>\n
 Poni\u017csze przyk\u0142ady pokazuj\u0105, jak w praktyce u\u017cywa\u0107 tej sk\u0142adni z nast\u0119puj\u0105c\u0105 ramk\u0105 DataFrame pand:<\/span><\/p>\n
 import<\/span> pandas as<\/span> pd\n\n#createDataFrame\n<\/span>df = pd. DataFrame<\/span> ({' points<\/span> ': [25, 12, 15, 14, 19],\n                   ' assists<\/span> ': [5, 7, 7, 9, 12],\n                   ' rebounds<\/span> ': [11, 8, 10, 6, 6]})\n\n#view DataFrame\n<\/span>df\n\n\tpoints assists rebounds\n0 25 5 11\n1 12 7 8\n2 15 7 10\n3 14 9 6\n4 19 12 6\n<\/strong><\/pre>\n
 Przyk\u0142ad 1: Iteracja po wszystkich kolumnach DataFrame<\/strong><\/span><\/h3>\n
 Poni\u017cszy kod pokazuje, jak iterowa\u0107 po ka\u017cdej kolumnie ramki DataFrame pandy:<\/span><\/p>\n
 for name, values in<\/span> df. iteritems<\/span> ():\nprint<\/span> (values)<\/span><\/span>\n\n0 25\n1 12\n2 15\n3 14\n4 19\nName: points, dtype: int64\n0 5\n1 7\n2 7\n3 9\n4 12\nName: assists, dtype: int64\n0 11\n1 8\n2 10\n3 6\n4 6\nName: rebounds, dtype: int64<\/strong><\/pre>\n
 Mo\u017cemy r\u00f3wnie\u017c u\u017cy\u0107 nast\u0119puj\u0105cej sk\u0142adni, aby przej\u015b\u0107 przez ka\u017cd\u0105 kolumn\u0119 i wydrukowa\u0107 tylko nazwy kolumn:<\/span><\/p>\n
 for name, values in<\/span> df. iteritems<\/span> ():\nprint<\/span> (name)\n\npoints\nassists\nrebounds\n<\/span><\/span><\/strong><\/pre>\n
 Przyk\u0142ad 2: Iteracja po okre\u015blonych kolumnach<\/strong><\/span><\/h3>\n
 Poni\u017csza sk\u0142adnia pokazuje, jak iterowa\u0107 po okre\u015blonych kolumnach w ramce DataFrame pandy:<\/span><\/p>\n
 for<\/span> name, values in<\/span> df[[' points<\/span> ', ' rebounds<\/span> ']]. iteritems<\/span> ():\n  print<\/span> (values)\n\n0 25\n1 12\n2 15\n3 14\n4 19\nName: points, dtype: int64\n0 11\n1 8\n2 10\n3 6\n4 6\nName: rebounds, dtype: int64\n<\/span><\/span><\/strong><\/pre>\n
 Mo\u017cemy r\u00f3wnie\u017c u\u017cy\u0107 nast\u0119puj\u0105cej sk\u0142adni do iteracji po zakresie okre\u015blonych kolumn:<\/span><\/p>\n
 for<\/span> name, values in df. iloc<\/span> [:, 0:2]<\/span><\/span> . iteritems<\/span> ():\n  print<\/span> (values)\n\n0 25\n1 12\n2 15\n3 14\n4 19\nName: points, dtype: int64\n0 5\n1 7\n2 7\n3 9\n4 12\nName: assists, dtype: int64\n<\/span><\/span><\/strong><\/pre>\n
 Pe\u0142n\u0105 dokumentacj\u0119 funkcji iteritems()<\/strong> znajdziesz tutaj<\/a> .<\/span><\/p>\n
 Dodatkowe zasoby<\/strong><\/span><\/h3>\n
 Jak zastosowa\u0107 funkcj\u0119 do wybranych kolumn w Pandach<\/a>
 Jak zmieni\u0107 kolejno\u015b\u0107 kolumn w Pandach<\/a>
 Jak usun\u0105\u0107 kolumny wed\u0142ug indeksu w Pandach<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
Do iteracji po kolumnach ramki DataFrame pandy mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cej podstawowej sk\u0142adni: for name, values in df. iteritems (): print (values) Poni\u017csze przyk\u0142ady pokazuj\u0105, jak w praktyce u\u017cywa\u0107 tej sk\u0142adni z nast\u0119puj\u0105c\u0105 ramk\u0105 DataFrame pand: import pandas as pd #createDataFrame df = pd. DataFrame ({’ points ’: [25, 12, 15, 14, 19], ’ assists ’: […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-1926","post","type-post","status-publish","format-standard","hentry","category-przewodnik"],"yoast_head":"\nJak przegl\u0105da\u0107 kolumny w Pandas DataFrame - Statorials<\/title>\n<meta name=\"description\" content=\"W tym samouczku wyja\u015bniono, jak iterowa\u0107 po kolumnach ramki DataFrame pandy, podaj\u0105c kilka przyk\u0142ad\u00f3w.\" \/>\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\/pl\/pandy-iteruja-po-kolumnach-ramki-danych\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Jak przegl\u0105da\u0107 kolumny w Pandas DataFrame - Statorials\" \/>\n<meta property=\"og:description\" content=\"W tym samouczku wyja\u015bniono, jak iterowa\u0107 po kolumnach ramki DataFrame pandy, podaj\u0105c kilka przyk\u0142ad\u00f3w.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pl\/pandy-iteruja-po-kolumnach-ramki-danych\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-24T10:24:52+00:00\" \/>\n<meta name=\"author\" content=\"Benjamin Anderson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Napisane przez\" \/>\n\t<meta name=\"twitter:data1\" content=\"Benjamin Anderson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Szacowany czas czytania\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minuta\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/pl\/pandy-iteruja-po-kolumnach-ramki-danych\/\",\"url\":\"https:\/\/statorials.org\/pl\/pandy-iteruja-po-kolumnach-ramki-danych\/\",\"name\":\"Jak przegl\u0105da\u0107 kolumny w Pandas DataFrame - Statorials\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pl\/#website\"},\"datePublished\":\"2023-07-24T10:24:52+00:00\",\"dateModified\":\"2023-07-24T10:24:52+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\"},\"description\":\"W tym samouczku wyja\u015bniono, jak iterowa\u0107 po kolumnach ramki DataFrame pandy, podaj\u0105c kilka przyk\u0142ad\u00f3w.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pl\/pandy-iteruja-po-kolumnach-ramki-danych\/#breadcrumb\"},\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pl\/pandy-iteruja-po-kolumnach-ramki-danych\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pl\/pandy-iteruja-po-kolumnach-ramki-danych\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Dom\",\"item\":\"https:\/\/statorials.org\/pl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Jak przegl\u0105da\u0107 kolumny w pandas dataframe\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/statorials.org\/pl\/#website\",\"url\":\"https:\/\/statorials.org\/pl\/\",\"name\":\"Statorials\",\"description\":\"Tw\u00f3j przewodnik po kompetencjach statystycznych!\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/statorials.org\/pl\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"pl-PL\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\",\"name\":\"Benjamin Anderson\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"pl-PL\",\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/statorials.org\/pl\/wp-content\/uploads\/2023\/11\/Benjamin-Anderson-96x96.jpg\",\"contentUrl\":\"https:\/\/statorials.org\/pl\/wp-content\/uploads\/2023\/11\/Benjamin-Anderson-96x96.jpg\",\"caption\":\"Benjamin Anderson\"},\"description\":\"Cze\u015b\u0107, jestem Benjamin i jestem emerytowanym profesorem statystyki, kt\u00f3ry zosta\u0142 oddanym nauczycielem Statorials. 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