[scrapy 爬蟲] 什麼是scrapy以及為什麼要用scrapy 爬取網頁?
Synopsis
透過Scrapy 網路爬蟲框架，我們就可以在不用重造輪子的情況下撰寫較為完整且具非同步化(asynchronous)請求能力的網路爬蟲。
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