原来的方式是从根节点，一般是html开始逐一向下进行元素定位，这种方式唯一缺点在于整个xpath语句会很长，比如： /html/body ...
The headline is xpath_array + UNNEST: it turns a column of XML documents into shredded rows, one per matching node, in a single SQL statement: ...
My old workflow was: - Open the page in Chrome DevTools - Find a unique CSS selector or XPath to grab the price, title, and description - Write a script using BeautifulSoup or Selenium - Run it once, ...
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