What is XPath and how is it used in web scraping?
XPath, or XML Path Language, is a query language used to select nodes from an XML document. In web scraping, it's used to navigate through elements and attributes in HTML documents.
Can you give me an example of how to use XPath in a web scraping script?
Sure! In Python, you can use libraries like lxml or Scrapy. For example, with lxml, you can use tree.xpath('//div[@class="example"]')
to select all div elements with the class 'example'.
What are some common XPath expressions I should know?
Some common XPath expressions include: //a
for all anchor tags, //div[@id='main']
for a specific div by ID, and //li[position()=1]
for the first list item.
Are there any tools that can help me build XPath queries?
Yes, tools like Chrome DevTools and Firefox's XPath Checker can help you test and build XPath queries interactively.
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