python - 如何获取文本并替换某些标签之间的文本

Question

给定一个字符串

"<p> >this line starts with an arrow <br /> this line does not </p>"

或

"<p> >this line starts with an arrow </p> <p> this line does not </p>"

如何找到以箭头开头并用 div 包围的行

这样就变成了:

"<p> <div> >this line starts with an arrow </div> <br /> this line does not </p>

Answer 1

由于您要解析的是 HTML，因此请使用工具来完成这项工作 - HTML 解析器，例如 BeautifulSoup .

使用find_all()查找以 > 和 wrap() 开头的所有文本节点它们带有一个新的 div 标签:

from bs4 import BeautifulSoup

data = "<p> >this line starts with an arrow <br /> this line does not </p>"

soup = BeautifulSoup(data)
for item in soup.find_all(text=lambda x: x.strip().startswith('>')):
    item.wrap(soup.new_tag('div'))

print soup.prettify()

打印:

<p>
    <div>
    >this line starts with an arrow
    </div>
    <br/>
    this line does not
</p>