{"id":19404,"date":"2022-11-11T06:02:27","date_gmt":"2022-11-11T10:02:27","guid":{"rendered":"https:\/\/drive2data.com\/it\/?p=19404"},"modified":"2024-05-02T10:54:32","modified_gmt":"2024-05-02T14:54:32","slug":"web-scraping-e-sentiment-analysis","status":"publish","type":"post","link":"https:\/\/drive2data.com\/it\/web-scraping-e-sentiment-analysis\/","title":{"rendered":"Web scraping &#038; Sentiment Analysis"},"content":{"rendered":"<p>[et_pb_section fb_built=&#8221;1&#8243; admin_label=&#8221;section&#8221; _builder_version=&#8221;4.19.5&#8243; background_color=&#8221;#020000&#8243; custom_padding=&#8221;|0px||||&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_row admin_label=&#8221;row&#8221; _builder_version=&#8221;4.19.5&#8243; background_color=&#8221;#020000&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.16&#8243; custom_padding=&#8221;|||&#8221; global_colors_info=&#8221;{}&#8221; custom_padding__hover=&#8221;|||&#8221;][et_pb_text _builder_version=&#8221;4.19.5&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"color: #ffffff;\">Oggi lo <strong>scraping <\/strong>di dati assume un ruolo sempre pi\u00f9 strategico e importante per identificare trends, effettuare analisi sull\u2019uso di prodotti e impostare strategie di marketing.<\/span><\/p>\n<p><span style=\"color: #ffffff;\">Il termine \u201cweb scraping\u201d, dall\u2019inglese \u201cto scrape\u201d raschiare\/grattare, \u00e8 una tecnica di <strong>Crawling<\/strong>. Un crawler \u00e8 un software che ha lo scopo di raccogliere tutte le informazioni necessarie per indicizzare le pagine di un sito, trovare associazioni fra termini di ricerca e analizzare i collegamenti ipertestuali. Lo scopo \u00e8 quello di estrarre dati per poi raccoglierli in database e ricavarne varie informazioni utili.<\/span><\/p>\n<p><span style=\"color: #ffffff;\">Questa tecnica \u00e8 largamente utilizzata da tutti i motori di ricerca, primo fra tutti <strong>Google<\/strong>, in modo da offrire agli utenti risultati sempre pertinenti e aggiornati.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h2><strong>La metodologia del Web scraping<\/strong><\/h2>\n<p><span style=\"color: #ffffff;\">Per ottenere dati dalla rete e dai portali web possono essere messe in atto diverse metodologie. Tutte accomunate dall\u2019utilizzo di <strong>API<\/strong> che consentono di accedere in rapida sequenza alle pagine online per estrarne le informazioni. Sfruttando bot e altri sistemi software automatizzati si simula la navigazione online di <strong>users umani<\/strong> e si richiede l\u2019accesso a risorse web esattamente come accade nel caso di un normale browser. Il server risponder\u00e0 inviando tutte le informazioni richieste che saranno collezionate all\u2019interno di grandi database e catalogate come fossero <strong>Big Data<\/strong>.<\/span><\/p>\n<p><span style=\"color: #ffffff;\">Ad oggi, vengono utilizzati principalmente i seguenti metodi:<\/span><\/p>\n<ul>\n<li><span style=\"color: #ffffff;\"><strong>Manuale<\/strong>: con una quantit\u00e0 di dati minore \u00e8 possibile fare copia e incolla manuale. Raramente questa metodologia risulta essere la migliore in quanto necessita di molte risorse e tempistiche lunghe.<\/span><\/li>\n<li><span style=\"color: #ffffff;\"><strong>Parser HTML o XHTML<\/strong>: Le pagine di molti siti web sono realizzate in un linguaggio di markup, solitamente HTML. Essendo strutturate con i TAG HTML, si pu\u00f2 effettuare il parsing della pagina e prelevare il contenuto di un TAG che contiene il dato a cui si \u00e8 interessati.<\/span><\/li>\n<li><span style=\"color: #ffffff;\"><strong>Web Mapping<\/strong>: con il passare degli anni sono stati realizzati diversi software e\u00a0tool\u00a0in grado di riconoscere automaticamente la struttura della pagina web e andare a &#8220;pescare&#8221; le informazioni richieste senza che sia necessario alcun intervento umano<\/span><\/li>\n<li><span style=\"color: #ffffff;\"><strong>Computer Vision<\/strong>: sfruttando il <strong>machine learning<\/strong> \u00e8 possibile utilizzare tecniche di \u201cweb harvesting\u201d che analizzano le pagine web seguendo la stessa procedura di un utente umano. In questo modo si riduce di molto il lavoro richiesto ai software di web scraping e si ottengono informazioni pi\u00f9 pertinenti.<\/span><\/li>\n<\/ul>\n<h3>\u00a0Il web scraping \u00e8 legale?<\/h3>\n<p><span style=\"color: #ffffff;\"><em>\u201cIf your content can be viewed on the web, it can be scraped\u201d <\/em>Rami Essaid, CEO and co-founder of Distil Networks.<\/span><\/p>\n<p><span style=\"color: #ffffff;\">Il web scraping <strong>\u00e8 legale<\/strong> a patto che i dati analizzati siano accessibili direttamente sui siti e siano usati per scopi statistici o di monitoraggio dei contenuti.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h2>La Sentiment Analysis: perch\u00e9 \u00e8 cos\u00ec importante per le aziende?<\/h2>\n<p><span style=\"color: #ffffff;\">Nell\u2019era della <strong>Data Economy<\/strong>, la tecnica del web scraping assume un ruolo fondamentale per identificare tendenze, effettuare indagini statistiche e capire il sentiment degli utenti. La Sentiment Analysis pu\u00f2 essere definita come un\u2019attivit\u00e0 concentrata ad analizzare e ascoltare il web con l\u2019obiettivo di comprendere le opinioni delle persone su un brand e\/o servizio-prodotto. Grazie a questa pratica oggi le aziende hanno la possibilit\u00e0 di\u00a0<em>avere molte pi\u00f9 informazioni correlate alla semplice percezione degli utenti.<\/em><\/span><\/p>\n<p><span style=\"color: #ffffff;\">Quali sono i principali vantaggi?<\/span><\/p>\n<ul>\n<li><span style=\"color: #ffffff;\">Individuare mode e <strong>trends<\/strong> di settore per rimanere sempre aggiornati sui cambiamenti nel mercato<\/span><\/li>\n<li><span style=\"color: #ffffff;\">Analizzare statistiche in modo da valutare la giusta <strong>brand strategy<\/strong><\/span><\/li>\n<li><span style=\"color: #ffffff;\">Acquisire <strong>vantaggi competitivi<\/strong> e conoscere in tempo reale le strategie dei concorrenti, per esempio prezzi e prodotti<\/span><\/li>\n<li><span style=\"color: #ffffff;\">Proteggere la <strong>reputazione<\/strong> aziendale e intervenire tempestivamente in caso di crisi o danno d\u2019immagine.<\/span><\/li>\n<li><span style=\"color: #ffffff;\">Avere un feedback immediato dopo il <strong>lancio<\/strong> di un nuovo prodotto o servizio.<\/span><\/li>\n<\/ul>\n<p><span style=\"color: #ffffff;\">Conoscere i diversi tipi di\u00a0Sentiment Analysis\u00a0\u00e8 essenziale per capire quale utilizzare per il raggiungimento di un obiettivo aziendale:<\/span><\/p>\n<ul>\n<li><span style=\"color: #ffffff;\">Analisi <strong>dettagliata:<\/strong> fornisce una comprensione dettagliata del feedback ricevuto dagli utenti. \u00c8 possibile ottenere risultati precisi in termini di polarit\u00e0 su scale di positivit\u00e0 o negativit\u00e0 (con numerazione crescente, da 1 a 10).<\/span><\/li>\n<li><span style=\"color: #ffffff;\">Analisi <strong>emozionale<\/strong>: ha l\u2019obiettivo di rilevare le emozioni usando complessi algoritmi di machine learning che analizzano il lessico.<\/span><\/li>\n<li><span style=\"color: #ffffff;\">Analisi basata sull\u2019<strong>aspetto del prodotto<\/strong>: questa tipologia \u00e8 condotta per un singolo aspetto di un servizio o di un prodotto in modo da avere un feedback preciso su una caratteristica specifica.<\/span><\/li>\n<li><span style=\"color: #ffffff;\">Analisi dell\u2019<strong>intenzione<\/strong>: permette di avere una comprensione pi\u00f9 profonda dell\u2019intenzione del cliente. Capire quest\u2019ultima pu\u00f2 essere utile per individuare un modello \u201cbase\u201d di consumatore in modo da impostare un piano di marketing adeguato ed efficiente.<\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3><strong>Semantic Recognition Engine di Drive<span style=\"color: #ffcc00;\">2<\/span>data<\/strong><\/h3>\n<p><span style=\"color: #ffffff;\">Noi di <strong>Drive2Data<\/strong>, esperti nella Data Quality e Data Intelligence, abbiamo svolto diversi studi sui processi di Sentiment Analysis sfruttando l\u2019applicazione del Natural Language Processing (<strong>NLP<\/strong>) e utilizzando modelli di <strong>Deep Learning.<\/strong><\/span><\/p>\n<p><span style=\"color: #ffffff;\">Uno strumento che restituisce informazioni sul contesto delle frasi, riconoscendone le emozioni, con l\u2019obiettivo di aiutare le aziende a gestire l\u2019analisi del sentimento in modo automatico e veloce.<\/span><\/p>\n<p><span style=\"color: #ffffff;\"><u>Crediamo fortemente che la tecnologia, se utilizzata nel modo giusto, possa contribuire a rendere il mondo pi\u00f9 sicuro e sostenibile.<\/u><\/span><\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row admin_label=&#8221;row&#8221; _builder_version=&#8221;4.16&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; custom_margin=&#8221;25px||||false|false&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.16&#8243; custom_padding=&#8221;|||&#8221; global_colors_info=&#8221;{}&#8221; custom_padding__hover=&#8221;|||&#8221;][et_pb_divider _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; width=&#8221;70%&#8221; module_alignment=&#8221;center&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_divider][et_pb_button button_url=&#8221;mailto:%20support@drive2data.com&#8221; url_new_window=&#8221;on&#8221; button_text=&#8221;CONTATTACI&#8221; button_alignment=&#8221;center&#8221; _builder_version=&#8221;4.19.5&#8243; _module_preset=&#8221;default&#8221; custom_button=&#8221;on&#8221; button_text_size=&#8221;22px&#8221; button_text_color=&#8221;#ffb300&#8243; button_bg_color=&#8221;#020000&#8243; button_border_width=&#8221;2px&#8221; button_border_color=&#8221;#E09900&#8243; button_border_radius=&#8221;10px&#8221; button_font=&#8221;|600|||||||&#8221; button_use_icon=&#8221;off&#8221; custom_margin=&#8221;||2%||false|false&#8221; custom_padding=&#8221;16px|16px|16px|16px|false|true&#8221; box_shadow_style=&#8221;preset1&#8243; locked=&#8221;off&#8221; global_colors_info=&#8221;{%22gcid-f2ce690f-aeee-4241-a830-be586ba3dd75%22:%91%93}&#8221;][\/et_pb_button][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; Oggi lo scraping di dati assume un ruolo sempre pi\u00f9 strategico e importante per identificare trends, effettuare analisi sull\u2019uso di prodotti e impostare strategie di marketing. Il termine \u201cweb scraping\u201d, dall\u2019inglese \u201cto scrape\u201d raschiare\/grattare, \u00e8 una tecnica di Crawling. Un crawler \u00e8 un software che ha lo scopo di raccogliere tutte le informazioni necessarie [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":19407,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[190],"tags":[206,195,199,194,193,209,208,197],"class_list":["post-19404","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-neuralmodel","tag-bigdata","tag-cybersecurity","tag-dati","tag-digitalizzazione","tag-intelligenza-artificiale","tag-machine-learning","tag-sentimentanalysis"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Web scraping &amp; Sentiment Analysis - Drive2Data Inc.<\/title>\n<meta name=\"description\" content=\"Nell\u2019era della Data Economy, la Sentiment Analysis assume un ruolo sempre pi\u00f9 strategico e importante per la crescita aziendale.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/drive2data.com\/it\/web-scraping-e-sentiment-analysis\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Web scraping &amp; 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