{"id":104,"date":"2019-06-30T19:44:22","date_gmt":"2019-06-30T22:44:22","guid":{"rendered":"https:\/\/micheladrianomedeiros.com.br\/blog\/?p=104"},"modified":"2019-10-07T11:06:54","modified_gmt":"2019-10-07T14:06:54","slug":"data-science-com-python","status":"publish","type":"post","link":"https:\/\/micheladrianomedeiros.com.br\/blog\/data-science-com-python\/","title":{"rendered":"Data Science Com Python #1"},"content":{"rendered":"\n<p>Data Science (ci\u00eancia de\ndados) \u00e9 um campo interdisciplinar englobando m\u00e9todos cient\u00edficos, processos, e\nsistemas para extrair conhecimento ou percep\u00e7\u00f5es de dados de v\u00e1rios\nformul\u00e1rios, seja estruturado ou n\u00e3o. \u00c9 um pouco de princ\u00edpios da matem\u00e1tica,\nestat\u00edstica, ci\u00eancia da informa\u00e7\u00e3o, machine learning, visualiza\u00e7\u00f5es, data\nmining, e an\u00e1lise preditiva. Contudo, seu fundamento est\u00e1 na matem\u00e1tica.\nAlgumas pessoas utilizam Python para aprender a manipular as informa\u00e7\u00f5es, ent\u00e3o\nvamos ver um pouco de Python.<\/p>\n\n\n\n<p class=\"has-text-color has-vivid-cyan-blue-color\"><strong>Python<\/strong><\/p>\n\n\n\n<p>Python tem v\u00e1rios recursos que\no torna ideal para aprender a fazer Data Science. \u00c9 gratuito, o c\u00f3digo \u00e9\nrelativamente simples, f\u00e1cil de entender, e h\u00e1 muitas bibliotecas \u00fateis para\nfacilitar os problemas para serem resolvidos na Data Science. \u00c9 f\u00e1cil montar um\nprot\u00f3tipo de virtualiza\u00e7\u00e3o de cen\u00e1rio e demonstra\u00e7\u00e3o dos conceitos da Data Science\nde uma maneira f\u00e1cil de entender.<\/p>\n\n\n\n<p class=\"has-text-color has-vivid-cyan-blue-color\"><strong>Fun\u00e7\u00f5es e Strings<\/strong><\/p>\n\n\n\n<p>As fun\u00e7\u00f5es do Python s\u00e3o de\nprimeira classe, isto significa que elas podem ser utilizadas como par\u00e2metros, retorna\nde um valor, atribuir a uma vari\u00e1vel, e salvar eu uma estrutura de dados. Simplesmente,\nfun\u00e7\u00f5es funcionam como se fossem uma vari\u00e1vel. Fun\u00e7\u00f5es podem ser personalizadas\nou built-in(embutidas). A personaliza\u00e7\u00e3o da fun\u00e7\u00e3o fica a cargo do programador,\nenquanto o built fica a cargo da linguagem. Strings s\u00e3o tipos muito populares de\ninclus\u00e3o mesmo com aspas simples ou duplas.<\/p>\n\n\n\n<p>O exemplo a seguir define as fun\u00e7\u00f5es personalizadas e usa as fun\u00e7\u00f5es embutidas.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>def num_to_str(n):\n    return str(n)\n\ndef str_to_int(s):\n    return int(s)\n\t\ndef str_to_float(f):\n    return float(f)\n\t\nif __name__ == \"__main__\":\n\tfloat_num = 999.01\n\tint_num = 87\n\tfloat_str = '23.09'\n\tint_str = '19'\n\tstring = 'how now brown cow'\n\ts_float = num_to_str(float_num)\n\ts_int = num_to_str(int_num)\n\ti_str = str_to_int(int_str)\n\tf_str = str_to_float(float_str)\n\tprint(s_float, 'is', type(s_float))\n\tprint(s_int, 'is', type(s_int))\n\tprint(f_str, 'is', type(f_str))\n\tprint(i_str, 'is', type(i_str))\n\tprint('\\nstring', '\"' + string + '\" has', len(string), \n\t'characters')\n\tstr_ls = string.split()\n\tprint('split string:', str_ls)\n\tprint('joined list:', ' '.join(str_ls))\n\n<\/code><\/pre>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Sa\u00edda:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"536\" height=\"160\" src=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/06\/1-1.png\" alt=\"\" class=\"wp-image-105\" srcset=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/06\/1-1.png 536w, https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/06\/1-1-300x90.png 300w\" sizes=\"auto, (max-width: 536px) 100vw, 536px\" \/><\/figure><\/div>\n\n\n\n<p>Uma forma popular de\ncodifica\u00e7\u00e3o hoje em dia \u00e9 mostrar as importa\u00e7\u00f5es das bibliotecas e fun\u00e7\u00f5es\nprimeiro, e depois segue o bloco do c\u00f3digo. O c\u00f3digo come\u00e7a com tr\u00eas fun\u00e7\u00f5es\npersonalizadas que converte n\u00fameros em strings, strings em n\u00fameros, e strings\nem float. Cada fun\u00e7\u00e3o retorna uma fun\u00e7\u00e3o embutida que permite o Python fazer a\nconvers\u00e3o. Se precisar fazer coment\u00e1rios no c\u00f3digo utilize # para coment\u00e1rios\nde uma linha e \u2018\u2019\u2019 para m\u00faltiplas linhas. O coment\u00e1rio de m\u00faltiplas linhas deve\ncome\u00e7ar com \u2018\u2019\u2019 (fazer o seu coment\u00e1rio) e terminar com \u2018\u2019\u2019.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"447\" height=\"105\" src=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/06\/2-1.png\" alt=\"\" class=\"wp-image-106\" srcset=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/06\/2-1.png 447w, https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/06\/2-1-300x70.png 300w\" sizes=\"auto, (max-width: 447px) 100vw, 447px\" \/><\/figure><\/div>\n\n\n\n<p>H\u00e1 cinco vari\u00e1veis declaradas\nno c\u00f3digo.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"352\" height=\"120\" src=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/06\/3-1.png\" alt=\"\" class=\"wp-image-107\" srcset=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/06\/3-1.png 352w, https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/06\/3-1-300x102.png 300w\" sizes=\"auto, (max-width: 352px) 100vw, 352px\" \/><\/figure><\/div>\n\n\n\n<p>A seguir h\u00e1 quatro linhas que\nconvertem cada vari\u00e1vel para outro tipo.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"387\" height=\"92\" src=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/06\/4-1.png\" alt=\"\" class=\"wp-image-108\" srcset=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/06\/4-1.png 387w, https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/06\/4-1-300x71.png 300w\" sizes=\"auto, (max-width: 387px) 100vw, 387px\" \/><\/figure><\/div>\n\n\n\n<p>Por exemplo, a fun\u00e7\u00e3o\nnum_to_str converte a vari\u00e1vel float_num para um tipo string. <\/p>\n\n\n\n<p>As pr\u00f3ximas quatro linhas\nmostram os valores e os tipos das vari\u00e1veis. A fun\u00e7\u00e3o type() retorna o tipo do objeto.\n<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"454\" height=\"94\" src=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/06\/5-2.png\" alt=\"\" class=\"wp-image-109\" srcset=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/06\/5-2.png 454w, https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/06\/5-2-300x62.png 300w\" sizes=\"auto, (max-width: 454px) 100vw, 454px\" \/><\/figure><\/div>\n\n\n\n<p>O restante do c\u00f3digo manipula\nas vari\u00e1veis e mostra os seus valores.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"655\" height=\"119\" src=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/06\/6-1.png\" alt=\"\" class=\"wp-image-110\" srcset=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/06\/6-1.png 655w, https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/06\/6-1-300x55.png 300w\" sizes=\"auto, (max-width: 655px) 100vw, 655px\" \/><\/figure><\/div>\n\n\n\n<p>Fonte livro:  <strong>Data Science Fundamentals for Python&nbsp;and&nbsp;MongoDB&nbsp;<\/strong> <\/p>\n\n\n\n<p class=\"has-text-color has-background has-very-dark-gray-color has-vivid-cyan-blue-background-color\"><strong>\ud83d\ude04&nbsp;Data Science Fundamentals for Python&nbsp;and&nbsp;MongoDB&nbsp;<\/strong><\/p>\n\n\n\n<p><a href=\"https:\/\/amzn.to\/2XeNhA2\">https:\/\/amzn.to\/2XeNhA2<\/a><\/p>\n\n\n\n<p class=\"has-text-color has-background has-very-dark-gray-color has-vivid-cyan-blue-background-color\"><strong>\ud83d\ude04 CURSO PYTHON PARA WEB COM FLASK&nbsp;&nbsp;<\/strong><\/p>\n\n\n\n<p>&gt;&gt;&gt;&nbsp;<a href=\"http:\/\/bit.ly\/zigpython\" target=\"_blank\" rel=\"noreferrer noopener\">http:\/\/bit.ly\/zigpython<\/a>&nbsp;<\/p>\n\n\n\n<p class=\"has-text-color has-background has-very-dark-gray-color has-vivid-cyan-blue-background-color\"><strong>\ud83d\ude0d&nbsp;Tdd&nbsp;com Python: Siga o Bode dos Testes: Usando&nbsp;Django,&nbsp;Selenium&nbsp;e&nbsp;JavaScript&nbsp;<\/strong><\/p>\n\n\n\n<p>&gt;&gt;&gt;&nbsp;<a rel=\"noreferrer noopener\" href=\"https:\/\/amzn.to\/2RJ5Q9p\" target=\"_blank\">https:\/\/amzn.to\/2RJ5Q9p<\/a>&nbsp;&nbsp;<\/p>\n\n\n\n<p>#python #datascience<\/p>\n\n\n","protected":false},"excerpt":{"rendered":"<p>Data Science (ci\u00eancia de dados) \u00e9 um campo interdisciplinar englobando m\u00e9todos cient\u00edficos, processos, e sistemas para extrair conhecimento ou percep\u00e7\u00f5es de dados de v\u00e1rios formul\u00e1rios, seja estruturado ou n\u00e3o. \u00c9 um pouco de princ\u00edpios da matem\u00e1tica, estat\u00edstica, ci\u00eancia da informa\u00e7\u00e3o, machine learning, visualiza\u00e7\u00f5es, data mining, e an\u00e1lise preditiva. Contudo, seu fundamento est\u00e1 na matem\u00e1tica. Algumas [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":111,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[31],"tags":[33,32],"class_list":["post-104","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-datascience","tag-data-science","tag-python"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.5 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Data Science Com Python #1 - Viciados em Aprender<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/micheladrianomedeiros.com.br\/blog\/data-science-com-python\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Data Science Com Python #1\" \/>\n<meta property=\"og:description\" content=\"Data Science (ci\u00eancia de dados) \u00e9 um campo interdisciplinar englobando m\u00e9todos cient\u00edficos, processos, e sistemas para extrair conhecimento ou percep\u00e7\u00f5es de dados de v\u00e1rios formul\u00e1rios, seja estruturado ou n\u00e3o. \u00c9 um pouco de princ\u00edpios da matem\u00e1tica, estat\u00edstica, ci\u00eancia da informa\u00e7\u00e3o, machine learning, visualiza\u00e7\u00f5es, data mining, e an\u00e1lise preditiva. 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Viciados em Aprender","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:\/\/micheladrianomedeiros.com.br\/blog\/data-science-com-python\/","og_locale":"pt_PT","og_type":"article","og_title":"Data Science Com Python #1","og_description":"Data Science (ci\u00eancia de dados) \u00e9 um campo interdisciplinar englobando m\u00e9todos cient\u00edficos, processos, e sistemas para extrair conhecimento ou percep\u00e7\u00f5es de dados de v\u00e1rios formul\u00e1rios, seja estruturado ou n\u00e3o. \u00c9 um pouco de princ\u00edpios da matem\u00e1tica, estat\u00edstica, ci\u00eancia da informa\u00e7\u00e3o, machine learning, visualiza\u00e7\u00f5es, data mining, e an\u00e1lise preditiva. Contudo, seu fundamento est\u00e1 na matem\u00e1tica. 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