Python BeautifulSoup - 忽略子标签和 ID

Question

我有一个具有以下结构的文件。

我想找到所有父标签，即所有仅包含数字的 ID 以及其中包含的文本。但是，现在我得到了所有 a 标签(包括父标签和子标签)的平面结构。

<A ID=101>
<a id=”A1”>Today is a nice day. 
<a id=”A2”>Today is a very nice day.
<a id=”A3”>Today is a very very nice day.
</A>

<A ID=102>
<a id=”A1”>Today is a nice day2. 
<a id=”A2”>Today is a very nice day2.
<a id=”A3”>Today is a very very nice day2.
</A>

我只想要这个并忽略所有子标签和 ID。像这样提取的方法是什么？

<A ID=101>
Today is a nice day. 
Today is a very nice day.
Today is a very very nice day.
</A>

<A ID=102>
Today is a nice day2. 
Today is a very nice day2.
Today is a very very nice day2.
</A>

Answer 1

下面的代码可以满足您的要求，前提是子标签和父标签具有不同的名称，并且不仅仅是彼此的大写和小写版本

html = """
<B ID=101>
<a id=”A1”>Today is a nice day. 
<a id=”A2”>Today is a very nice day.
<a id=”A3”>Today is a very very nice day.
</B>

<B ID=102>
<a id=”A1”>Today is a nice day2. 
<a id=”A2”>Today is a very nice day2.
<a id=”A3”>Today is a very very nice day2.
</B>
"""
invalid_tags = ['a',"html","body"]
soup = BeautifulSoup(html,"lxml")
for tag in invalid_tags: 
    for match in soup.findAll(tag):
        match.replaceWithChildren()
print (soup)

这是因为BeautifulSoup默认处理html数据。HTML不区分大小写；解析时所有标签均小写。

如果需要匹配标签区分大小写，则需要将文档解析为 XML。安装lxml(通过pip)并告诉BeautifulSoup以XML模式使用该解析器例如

soup = BeautifulSoup(source, 'xml')