python - Beautiful Soup 迭代 html 标签

Question

我在 html 中有以下代码

<section>
    <section>
        <h2>Title1</h2>
        <p>Text1</p>
        <p>Text1</p>
     </section>
  <section>
        <h2>Title2</h2>
        <p>Text2</p>
        <p>Text2</p>
     </section>
  <section>
        <h2>Title3</h2>
        <p>Text3</p>
        <p>Text3</p>
     </section>
  </section>
<section>
        <h2>Title2-1</h2>
        <p>Text2-1</p>
        <p>Text2-1</p>
</section>
<section>
        <h2>Title3-1</h2>
        <p>Text3-1</p>
        <p>Text3-1</p>
</section>

因为有些部分有小节，有些则没有。我想获取子部分和没有子部分的部分的内容我正在尝试迭代这些小节，以便我可以在 scrapy 中创建索引。我有以下 scrapy 代码:

class RUSpider(BaseSpider):
name = "ru"
allowed_domains = ["http://127.0.0.1:8000/"]
start_urls = [
    "http://127.0.0.1:8000/week2/1_am/#/",
    "http://127.0.0.1:8000/week1/1/",
    "http://127.0.0.1:8000/week3/1_am/"
]
rules = [
    Rule(SgmlLinkExtractor(), follow=True)
]

def parse(self, response):

    filename = response.url.split("/")[3]
    hxs = HtmlXPathSelector(response)
    divs = hxs.select('//div')
    sections = divs.select('//section').extract()
   # print sections.extract


 #class definition for scrapy and html selector

    for each in sections: #iterate over loop [above sections]
        soup = BeautifulSoup(each)
        sp= soup.prettify()
        elements = soup.findAll("section".split())
        print len(elements),'sublength'
        if len(elements ) > 1:
            for element in elements:
                for subelement in element:
                    print subelement,'element'
        else:
            item = RItem() # create Index Item
            item['html_content'] = each
            print each
            yield item

尽管某些没有小节的部分被分解为单独的元素，但某些结果的格式正确。

我想要单独的每个部分。我的意思是因为 1 个部分还有其他部分。我想循环这些部分并单独获取它们，以便我可以跟踪循环。由于某些部分没有子部分，因此无需循环遍历它们。

在 BeautifulSoup 中有更好的方法吗？我想要以下输出

    <section>
        <h2>Title1</h2>
        <p>Text1</p>
        <p>Text1</p>
     </section>
  <section>
        <h2>Title2</h2>
        <p>Text2</p>
        <p>Text2</p>
     </section>
  <section>
        <h2>Title3</h2>
        <p>Text3</p>
        <p>Text3</p>
     </section>
 
    <section>
            <h2>Title2-1</h2>
            <p>Text2-1</p>
            <p>Text2-1</p>
    </section>
    <section>
            <h2>Title3-1</h2>
            <p>Text3-1</p>
            <p>Text3-1</p>
    </section>

Answer 1

检查此方法。这是您提供的数据的通用数据。

data = """
<section>
    <section>
        <h2>Title1</h2>
        <p>Text1</p>
        <p>Text1</p>
     </section>
  <section>
        <h2>Title2</h2>
        <p>Text2</p>
        <p>Text2</p>
     </section>
  <section>
        <h2>Title3</h2>
        <p>Text3</p>
        <p>Text3</p>
     </section>
  </section>
<section>
        <h2>Title2-1</h2>
        <p>Text2-1</p>
        <p>Text2-1</p>
</section>
<section>
        <h2>Title3-1</h2>
        <p>Text3-1</p>
        <p>Text3-1</p>
</section>
"""
from bs4 import BeautifulSoup

soup = BeautifulSoup(data)

sections = soup.find_all('section')


for each in sections: #iterate over loop [above sections]
    if each.find('section'):
        continue
    else:
        print each.prettify()