如何迭代div标记中的标记？

Question

我是BeautifulSoup的新手。下面是我感兴趣的html部分：

<div class="jpag" id="srchpagination"><a rel='prev' class="dis"><span>&lsaquo;&lsaquo;</span> Prev</a><span class="act">1</span><a 
href='http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-2' >2</a><a href='http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-3' >3</a><a 
href='http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-4' >4</a><a href='http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-5' >5</a><a 
href='http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-6' >6</a><a href='http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-7' >7</a><a 
href='http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-8' >8</a><a href='http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-9' >9</a><a 
href='http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-10' >10</a><a rel='next' href='http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-2'>Next 
<span>&rsaquo;&rsaquo;</span></a></div>

我想检查'a‘标签中最后一个页码的值是否为10。

atags1=bSoup.find('div' ,attrs={'class' : 'jpag'})

现在，我想遍历'a‘标记，它没有像rel="prev“或rel="next”这样的属性，所以我将只使用页面号来遍历'a’标记。请帮我一把。提前谢谢。

Answer 1

有很多种方法可以做到这一点，一种简单的方法是选择div中的锚并过滤任何具有rel攻击的内容：

html = """<div class="jpag" id="srchpagination"><a rel='prev' class="dis"><span>&lsaquo;&lsaquo;</span> Prev</a><span class="act">1</span><a
href='http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-2' >2</a><a href='http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-3' >3</a><a
href='http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-4' >4</a><a href='http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-5' >5</a><a
href='http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-6' >6</a><a href='http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-7' >7</a><a
href='http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-8' >8</a><a href='http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-9' >9</a><a
href='http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-10' >10</a><a rel='next' href='http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-2'>Next
<span>&rsaquo;&rsaquo;</span></a></div>"""

from bs4 import BeautifulSoup

soup = BeautifulSoup(html)

for a in soup.select("#srchpagination a[href]"):
    if not a.get("rel"):
        print(a)

这会让你：

<a href="http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-2">2</a>
<a href="http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-3">3</a>
<a href="http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-4">4</a>
<a href="http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-5">5</a>
<a href="http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-6">6</a>
<a href="http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-7">7</a>
<a href="http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-8">8</a>
<a href="http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-9">9</a>
<a href="http://www.justdial.com/Bangalore/Carpenters/ct-310711/page-10">10</a>