如何使用Python和Beautifulsoup从脚本标签获取JavaScript变量 [英] How to get JavaScript variables from a script tag using Python and Beautifulsoup

问题描述

我想使用beautifulsoup和python从变量meta返回"id"值.这可能吗?另外，我不知道如何找到包含meta变量的某些脚本"标签，因为它没有唯一的标识符，以及网站上的许多其他脚本"标签.我也正在使用硒，因此我可以理解任何答案.

I want to return the "id" value from the variable meta using beautifulsoup and python. This possible? Additionally, I don't know how to find the certain 'script' tag that contains the meta variable because it does not have a unique identifier, as well as many other 'script' tags on the site. I'm also using selenium as well, so I can understand any answers with that.

<script>
    var meta = "variants":[{"id":12443604615241,"price":14000}, 
    {"id":12443604648009,"price":14000}]
</script>

推荐答案

如果您使用的是硒，则无需解析html以获取js变量，只需使用硒 webdriver.execute_script()使其进入python:

If you are using selenium there's no need to parse the html to get the js variable, just use selenum webdriver.execute_script() to get it to python:

from selenium import webdriver

driver = webdriver.Firefox()
driver.get('https://whatever.com/')
meta = driver.execute_script('return meta')

就这样，meta现在拥有js变量，并且保持其类型

And thats it, meta now holds the js variable, and it maintains its type

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