Scrapy 是 Python 網絡爬蟲框架，只需基礎程式能力，即可從網站爬取結構化資料。比起傳統的爬蟲，有以下優點：
-
速度快：Scrapy 以 Twisted 引擎開發，能夠平行處理多個請求，大幅度提高爬蟲速度。
-
功能強大：提供許多進階功能，例如：客製化請求、頁面響應處理、事件處理、外掛機制等，滿足各種爬蟲需求。
-
延展性高：可透過繼承和延展來定義爬蟲行為，實現特殊功能。
-
代碼簡潔：Scrapy 提供的 API，簡潔易讀，精簡程式碼，易於維護。
-
自動限速功能：設定限制爬蟲的請求速度，避免對網站造成過大負擔。
-
Cookies 管理：在網頁多次請求中，保存和管理 Cookies 資訊，完成登錄驗證功能。
-
User-Agent 池：隨機選擇不同的 User-Agent 來模擬多種瀏覽器和裝置，避免被網站偵測出而被阻擋。
以上說明，修改自 ChatGPT 對 Scrapy 的回答，原本的問題是：Scrapy 比傳統的爬蟲多了什麼優點？
可能關於 Scrapy 的中文資料太少，ChatGPT 的回答，其實是從英文翻譯。
以下是同樣的問題，以英文詢問時的回覆。與中文不同是因為中文說明已重寫。
Scrapy is a fast, efficient, and scalable Python web crawling framework designed to crawl websites and extract structured data without having to write complex code. It helps developers quickly build web crawlers and provides a range of tools for data extraction, processing, and storage.
Compared to traditional crawlers, Scrapy has the following advantages:
-
Fast speed: Scrapy is developed based on the Twisted engine, which can process multiple requests in parallel, greatly improving the crawling speed.
-
Powerful functionality: Scrapy provides a range of advanced features, such as custom requests, page response handling, engine events, and plugin mechanisms, to meet various crawling needs.
-
Good scalability: Scrapy is a modular framework that can be customized by inheriting and extending to implement various special functions.
-
Concise code: Scrapy provides a range of concise and readable APIs that make crawling code more concise and easier to maintain.
-
Other: Scrapy also provides many useful tools, such as automatic throttling, Cookies management, and User-Agent pool, to help developers achieve more practical functions. For example, Scrapy provides automatic throttling to help users limit the request speed of crawlers to avoid excessive burden on the website. In addition, Scrapy also provides Cookies management to help users save and manage Cookies information in multiple requests, thus achieving more login verification functions. Furthermore, Scrapy also provides a User-Agent pool that can help users randomly select different User-Agents to simulate various browsers and devices, avoiding being detected by the website and being blocked. These functions can all improve the flexibility and usability of the crawler.