{"id":2866,"date":"2023-07-20T08:23:17","date_gmt":"2023-07-20T08:23:17","guid":{"rendered":"https:\/\/statorials.org\/pl\/pandy-dodaja-zera-wiodace\/"},"modified":"2023-07-20T08:23:17","modified_gmt":"2023-07-20T08:23:17","slug":"pandy-dodaja-zera-wiodace","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/pandy-dodaja-zera-wiodace\/","title":{"rendered":"Jak doda\u0107 zera wiod\u0105ce do ci\u0105g\u00f3w w pandach"},"content":{"rendered":"

<\/p>\n

\n

Mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cej sk\u0142adni, aby doda\u0107 zera pocz\u0105tkowe do ci\u0105g\u00f3w w ramce DataFrame pandy:<\/span><\/p>\n

 df[' ID<\/span> '] = df[' ID<\/span> ']. apply<\/span> (' {:0>7}<\/span> '. format<\/span> )\n<\/strong><\/pre>\n
 Ta konkretna formu\u0142a dodaje tyle zer wiod\u0105cych, ile potrzeba, do ci\u0105g\u00f3w w kolumnie oznaczonej \u201eID\u201d, a\u017c ka\u017cdy ci\u0105g b\u0119dzie mia\u0142 d\u0142ugo\u015b\u0107 7<\/strong> .<\/span><\/p>\n
 Mo\u017cesz zast\u0105pi\u0107 7<\/strong> inn\u0105 warto\u015bci\u0105, aby doda\u0107 inn\u0105 liczb\u0119 zer wiod\u0105cych.<\/span><\/p>\n
 Poni\u017cszy przyk\u0142ad pokazuje, jak zastosowa\u0107 t\u0119 sk\u0142adni\u0119 w praktyce.<\/span><\/p>\n
 Przyk\u0142ad: Dodaj zera wiod\u0105ce do ci\u0105g\u00f3w znak\u00f3w w Pandach<\/strong><\/span><\/h3>\n
 Za\u0142\u00f3\u017cmy, \u017ce mamy nast\u0119puj\u0105c\u0105 ramk\u0119 DataFrame pand, kt\u00f3ra zawiera informacje o sprzeda\u017cy i zwrotach z r\u00f3\u017cnych sklep\u00f3w:<\/span><\/p>\n
 import<\/span> pandas as<\/span> pd\n\n#createDataFrame<\/span>\ndf = pd. DataFrame<\/span> ({' ID<\/span> ': ['A25', 'B300', 'C6', 'D447289', 'E416', 'F19'],\n                   ' sales<\/span> ': [18, 12, 27, 30, 45, 23],\n                   ' refunds<\/span> ': [1, 3, 3, 2, 5, 0]})\n\n#view DataFrame\n<\/span>print<\/span> (df)\n\n        ID sales refunds\n0 A25 18 1\n1 B300 12 3\n2 C6 27 3\n3 D447289 30 2\n4 E416 45 5\n5 F19 23 0\n<\/strong><\/pre>\n
 Nale\u017cy pami\u0119ta\u0107, \u017ce d\u0142ugo\u015bci ci\u0105g\u00f3w w kolumnie \u201eID\u201d nie s\u0105 r\u00f3wne.<\/span><\/p>\n
 Widzimy jednak, \u017ce najd\u0142u\u017cszy ci\u0105g ma 7<\/strong> znak\u00f3w.<\/span><\/p>\n
 Mo\u017cemy u\u017cy\u0107 nast\u0119puj\u0105cej sk\u0142adni, aby doda\u0107 zera pocz\u0105tkowe do ci\u0105g\u00f3w w kolumnie \u201eID\u201d, tak aby ka\u017cdy ci\u0105g mia\u0142 d\u0142ugo\u015b\u0107 7<\/strong> :<\/span><\/p>\n
 #add leading zeros to 'ID' column\n<\/span>df[' ID<\/span> '] = df[' ID<\/span> ']. apply<\/span> (' {:0>7}<\/span> '. format<\/span> )\n\n#view updated DataFrame\n<\/span>print<\/span> (df)\n\n        ID sales refunds\n0 0000A25 18 1\n1 000B300 12 3\n2 00000C6 27 3\n3 D447289 30 2\n4 000E416 45 5\n5 0000F19 23 0\n<\/strong><\/span><\/pre>\n
 Nale\u017cy zauwa\u017cy\u0107, \u017ce do ci\u0105g\u00f3w w kolumnie \u201eID\u201d dodano zera pocz\u0105tkowe, dzi\u0119ki czemu ka\u017cdy ci\u0105g ma teraz t\u0119 sam\u0105 d\u0142ugo\u015b\u0107.<\/span><\/p>\n
 Uwaga<\/strong> : Pe\u0142n\u0105 dokumentacj\u0119 funkcji Apply<\/b> w pandach znajdziesz tutaj<\/a> .<\/span><\/p>\n
 Dodatkowe zasoby<\/strong><\/span><\/h3>\n
 Poni\u017csze samouczki wyja\u015bniaj\u0105, jak wykonywa\u0107 inne typowe zadania w pandach:<\/span><\/p>\n
 Jak przypisa\u0107 brakuj\u0105ce warto\u015bci w pandach<\/a>
 Jak policzy\u0107 brakuj\u0105ce warto\u015bci w pandach<\/a>
 Jak wype\u0142ni\u0107 warto\u015bci NaN \u015bredni\u0105 w pandach<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
Mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cej sk\u0142adni, aby doda\u0107 zera pocz\u0105tkowe do ci\u0105g\u00f3w w ramce DataFrame pandy: df[’ ID ’] = df[’ ID ’]. apply (’ {:0>7} ’. format ) Ta konkretna formu\u0142a dodaje tyle zer wiod\u0105cych, ile potrzeba, do ci\u0105g\u00f3w w kolumnie oznaczonej \u201eID\u201d, a\u017c ka\u017cdy ci\u0105g b\u0119dzie mia\u0142 d\u0142ugo\u015b\u0107 7 . Mo\u017cesz zast\u0105pi\u0107 7 inn\u0105 warto\u015bci\u0105, […]<\/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-2866","post","type-post","status-publish","format-standard","hentry","category-przewodnik"],"yoast_head":"\nJak doda\u0107 zera wiod\u0105ce do ci\u0105g\u00f3w znak\u00f3w w Pandach \u2013 Statorials<\/title>\n<meta name=\"description\" content=\"W tym samouczku wyja\u015bniono, na przyk\u0142adzie, jak doda\u0107 zera wiod\u0105ce do ci\u0105g\u00f3w w ramce DataFrame pandy.\" \/>\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-dodaja-zera-wiodace\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Jak doda\u0107 zera wiod\u0105ce do ci\u0105g\u00f3w znak\u00f3w w Pandach \u2013 Statorials\" \/>\n<meta property=\"og:description\" content=\"W tym samouczku wyja\u015bniono, na przyk\u0142adzie, jak doda\u0107 zera wiod\u0105ce do ci\u0105g\u00f3w w ramce DataFrame pandy.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pl\/pandy-dodaja-zera-wiodace\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-20T08:23:17+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=\"2 minuty\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/pl\/pandy-dodaja-zera-wiodace\/\",\"url\":\"https:\/\/statorials.org\/pl\/pandy-dodaja-zera-wiodace\/\",\"name\":\"Jak doda\u0107 zera wiod\u0105ce do ci\u0105g\u00f3w znak\u00f3w w Pandach \u2013 Statorials\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pl\/#website\"},\"datePublished\":\"2023-07-20T08:23:17+00:00\",\"dateModified\":\"2023-07-20T08:23:17+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\"},\"description\":\"W tym samouczku wyja\u015bniono, na przyk\u0142adzie, jak doda\u0107 zera wiod\u0105ce do ci\u0105g\u00f3w w ramce DataFrame pandy.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pl\/pandy-dodaja-zera-wiodace\/#breadcrumb\"},\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pl\/pandy-dodaja-zera-wiodace\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pl\/pandy-dodaja-zera-wiodace\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Dom\",\"item\":\"https:\/\/statorials.org\/pl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Jak doda\u0107 zera wiod\u0105ce do ci\u0105g\u00f3w w pandach\"}]},{\"@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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