了解網頁抓取

網頁抓取是使用機器人從網站提取資料的過程，它涉及透過以程式設計方式檢查所需的特定資訊來從網頁獲取內容，其中可能包括文字、圖片、價格、網址和標題。

注意
網路抓取必須負責任地進行，尊重服務條款和法律準則，因為某些網站限制資料提取。

網頁抓取的應用程式

• 電子商務 - 監控競爭對手的價格趨勢和產品可用性

• 市場研究 - 透過收集顧客評論和行為模式進行研究

• 潛在客戶生成 - 這涉及從某些目錄中提取資料以建立目標外展清單

• 新聞和金融數據 – 收集最新新聞、金融市場趨勢，以形成金融見解。

• 學術研究 – 收集資料進行分析研究

網頁抓取工具
網路抓取工具可以幫助您更輕鬆地從網站收集信息，並且通常可以自動執行資料擷取過程。

TOOL	DESCRIPTION	APPLICATION	BEST USED FOR
BeautifulSoup	Python library for parsing HTML and XML	Extracting content from static web pages, such as HTML tags and structured data tables	Projects that don’t need browsers interaction
Selenium	Browser automation tool that interacts with dynamic websites, filling forms, clicking buttons and handling javas cript content.	Extracting content from sites that require user interaction Scraping content generated by java script	Complex dynamic pages that offer infinite scroll
Scrapy	An open-source, python-based framework designed specifically for web scraping	Large-scale scraping projects and data pipelines	Crawling multiple pages, creating datasets from large websites and scraping structured data
Octoparse	A no-code tool with a drag-and-drop interface for building scraping workflows	Data collection for users without programming skills, especially for web pages that has job listings or social media profiles.	Quick data collection with no-code workflows
ParseHub	A visual extraction tool for scraping from dynamic websites using AI to understand and collect data from complex layouts	Scrapping data from AJAX-based websites, dashboards and interactive charts	Non-technical users who want to scrap data from complex, javascript-heavy websites.
Puppeteer	A Node.js library that provides high-level API to control chrome over the DevTools Protocol	Capturing and scraping dynamic java Script content, taking screenshots, generating PDFs and automated browser testing	Java script-heavy websites, especially when server-side data extraction is needed
Apify	A cloud-based scraping platform with an extensive library of ready made scraping tools, plus support for custom scripts.	Collecting large datasets or scrapping from multiple sources	Enterprise-level web scraping tasks that require scaling and automation

如果需要，您可以在一個專案中組合多個工具

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