{"id":90,"date":"2022-06-30T13:09:05","date_gmt":"2022-06-30T12:09:05","guid":{"rendered":"https:\/\/cristian-perez.com\/?p=90"},"modified":"2022-06-30T13:13:57","modified_gmt":"2022-06-30T12:13:57","slug":"avanzando-y-estudiando","status":"publish","type":"post","link":"https:\/\/cristian-perez.com\/en\/avanzando-y-estudiando\/","title":{"rendered":"Moving forward and studying"},"content":{"rendered":"

Hoy toca una peque\u00f1a actualizaci\u00f3n de en que punto exacto estoy. All\u00e1 vamos.<\/p>\n\n\n

\n
\"\"
Quiz\u00e1s la elecci\u00f3n m\u00e1s dif\u00edcil<\/figcaption><\/figure>\n<\/div>\n\n\n

Como bien coment\u00e9 en uno de mis primeros post<\/a>. Me he introducido de pleno en la programaci\u00f3n en Python y automatizaci\u00f3n en el mundo IT.<\/p>\n\n\n\n

Empec\u00e9 por un curso de \u00abchoque\u00bb de introducci\u00f3n a Python <\/a>y actualmente estoy en siguiente modulo de \u00abUso de Python con el sistema operativo\u00bb<\/a>, el cual me est\u00e1 costando un poco m\u00e1s ya que uno de los m\u00f3dulos son las expresiones regulares.<\/p>\n\n\n

\n
\"\"
Un ejemplo de uso. F\u00e1cil \u00bfno? \ud83d\ude09<\/figcaption><\/figure>\n<\/div>\n\n\n

Para quien no lo sepa, las expresiones regulares, son patrones de b\u00fasqueda que se usan para encontrar determinada informaci\u00f3n dentro de archivos o cadenas de texto.
Algo muy \u00fatil dentro del mundo de la programaci\u00f3n y sobre todo en la administraci\u00f3n IT.<\/p>\n\n\n\n

No hay nada mejor para econtrar a un usuario, nombre de \u00abhost\u00bb, patrones de IP, tiempo de conexi\u00f3n, y un largu\u00edsimo etc.<\/p>\n\n\n\n

Las expresiones regulares son totalmente personalizables, no hay un standard de uso. Aunque hay unas principales, que son las primeras en aprenderse. Y suelen ser comunes a los lenguajes de programaci\u00f3n, o al menos, hay pocas diferencias en su uso.<\/p>\n\n\n\n

Pero la difilcutad, radica en que son totalmente personalizables, y la que usa un programador no necesariamente la usa otro. E incluso, puede que al principio cueste entender el patr\u00f3n que us\u00f3 para encontrar la informaci\u00f3n.<\/p>\n\n\n\n

Un ejemplo:<\/p>\n\n\n\n

Si en una cadena de texto dada como esta:
\u00abEsta es una cadena de ejemplo creada el d\u00eda: 30-06-2022 a las 13:42\u00bb<\/em><\/p>\n\n\n\n

Queremos buscar la fecha, deber\u00edamos de crear un patr\u00f3n para que solo encuentre la fecha, tal que as\u00ed.<\/p>\n\n\n\n

import re #importamos el m\u00f3dulo de expresiones regulares.

print (re.search(r\"\\d{2}\\W\\d{2}\\W\\d{4}\", \"Esta es una cadena de ejemplo creada el d\u00eda: 30-06-2022 a las 13:42\"))<\/code><\/p>\n\n\n\n

Donde nos arrojar\u00e1 un resultado como este:<\/p>\n\n\n\n

<re.Match object; span=(35, 55), match='30-06-2022\"><\/code><\/p>\n\n\n\n

Por no ahondar mucho, b\u00e1sicamente, el patr\u00f3n propuesto es \\d{2}\\W\\d{2}\\W\\d{4}<\/code> donde:
\\d{2}<\/strong> nos dice que debe de coincidir con car\u00e1cteres n\u00famericos de al menos de 2 de longitud
\\W<\/strong> nos dice que no debe de coincir con car\u00e1cteres alfan\u00famericos.<\/p>\n\n\n\n

El resto es una variante o repectici\u00f3n del anterior. Y en el resultado nos muestra que:<\/p>\n\n\n\n

Span=(35, 55)<\/strong> Donde empieza el patr\u00f3n encontrado
Match=’30-06-2022′<\/strong> Es el patr\u00f3n que ha econtrado.<\/p>\n\n\n\n

Y as\u00ed se podr\u00eda hacer un b\u00fasqueda en un archivo de registros (log) para encontrar inicios de sesi\u00f3n por ejemplo.<\/p>\n\n\n\n

Mi patr\u00f3n que he puesto antes, es mejorable y puede ser totalmente distinto, de ah\u00ed que radica la difilcutad tanto de aprendizaje como de lectura de otros patrones. <\/p>\n\n\n\n

Cuanto m\u00e1s exacto sea el patr\u00f3n menos resultados no deseados econtraremos.<\/p>\n\n\n\n

Y con esto, es la entrada de hoy, ya os contar\u00e9 que tal el m\u00f3dulo entero.<\/p>\n\n\n\n

All the best.<\/p>","protected":false},"excerpt":{"rendered":"

Today is a small update on where I am at exactly. Here we go. As I mentioned in one of my first posts. I have fully immersed myself in Python programming and automation in the IT world. I started with a "shock" introductory course to Python and I am currently in the next module of... Read more<\/a><\/p>","protected":false},"author":1,"featured_media":93,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17,21],"tags":[30,13,32,12,33],"class_list":["post-90","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articulo","category-estudios","tag-coursera","tag-cursos","tag-expresiones-regualres","tag-python","tag-regular-expressions"],"yoast_head":"\nAvanzando y estudiando - Cristian Perez<\/title>\n<meta name=\"description\" content=\"Cristian Perez Estudios Avanzando y estudiando\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cristian-perez.com\/en\/avanzando-y-estudiando\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Avanzando y estudiando - 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