如何在BeautifulSoup中查找所有班级以字符串开头的div? [英] How to find all divs who's class starts with a string in BeautifulSoup?

问题描述

在BeautifulSoup中，如果我想查找所有班级为span3的div，则只需执行以下操作:

In BeautifulSoup, if I want to find all div's where whose class is span3, I'd just do:

result = soup.findAll("div",{"class":"span3"})

但是，在我的情况下，我想查找所有以span3开头的div，因此BeautifulSoup应该找到:

However, in my case, I want to find all div's whose class starts with span3, therefore, BeautifulSoup should find:

<div id="span3 span49">
<div id="span3 span39">

依此类推...

我如何实现自己想要的?我熟悉正则表达式；但是我不知道如何将它们实现为漂亮的汤，也无法通过BeautifulSoup的文档找到任何帮助.

How do I achieve what I want? I am familiar with regular expressions; however I do not know how to implement them to beautiful soup nor did I find any help by going through BeautifulSoup's documentation.

推荐答案

好吧，这些是您正在显示的id属性:

Well, these are id attributes you are showing:

<div id="span3 span49">
<div id="span3 span39">

在这种情况下，您可以使用:

In this case, you can use:

soup.find_all("div", id=lambda value: value and value.startswith("span3"))

或者:

soup.find_all("div", id=re.compile("^span3"))

---

如果这只是一个错字，并且您实际上具有class属性以span3开头，并且您确实需要检查该类以span3开头，则可以使用"starts-with" CSS选择器:

---

If this was just a typo, and you actually have class attributes start with span3, and your really need to check the class to start with span3, you can use the "starts-with" CSS selector:

soup.select("div[class^=span3]")

这是因为您不能以与检查id属性相同的方式检查class属性，因为class是特殊的，它是

This is because you cannot check the class attribute the same way you checked the id attribute because class is special, it is a multi-valued attribute.

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