Beautiful Soup 简明教程
Beautiful Soup - extract() Method
Method Description
Beautiful Soup 库中的 extract() 方法用于从文档树中移除标签或字符串。extract() 方法返回已移除的对象。它类似于 Python 列表中的 pop() 方法。
Example 1
html = '''
<div>
<p>Hello Python</p>
</div>
'''
from bs4 import BeautifulSoup
soup=BeautifulSoup(html, 'html.parser')
tag1 = soup.find("div")
tag2 = tag1.find("p")
ret = tag2.extract()
print ('Extracted:',ret)
print ('original:',soup)
Example 2
考虑以下 HTML 标记 -
<html>
<body>
<p> The quick, brown fox jumps over a lazy dog.</p>
<p> DJs flock by when MTV ax quiz prog.</p>
<p> Junk MTV quiz graced by fox whelps.</p>
<p> Bawds jog, flick quartz, vex nymphs./p>
</body>
</html>
以下为代码 -
from bs4 import BeautifulSoup
fp = open('index.html')
soup = BeautifulSoup(fp, 'html.parser')
tags = soup.find_all()
for tag in tags:
obj = tag.extract()
print ("Extracted:",obj)
print (soup)
Output
Extracted: <html>
<body>
<p> The quick, brown fox jumps over a lazy dog.</p>
<p> DJs flock by when MTV ax quiz prog.</p>
<p> Junk MTV quiz graced by fox whelps.</p>
<p> Bawds jog, flick quartz, vex nymphs.</p>
</body>
</html>
Extracted: <body>
<p> The quick, brown fox jumps over a lazy dog.</p>
<p> DJs flock by when MTV ax quiz prog.</p>
<p> Junk MTV quiz graced by fox whelps.</p>
<p> Bawds jog, flick quartz, vex nymphs.</p>
</body>
Extracted: <p> The quick, brown fox jumps over a lazy dog.</p>
Extracted: <p> DJs flock by when MTV ax quiz prog.</p>
Extracted: <p> Junk MTV quiz graced by fox whelps.</p>
Extracted: <p> Bawds jog, flick quartz, vex nymphs.</p>
Example 3
您还可以将 extract() 方法与 find_next()、find_previous() 方法和 next_element、previous_element 属性一起使用。
html = '''
<div>
<p><b>Hello</b><b>Python</b></p>
</div>
'''
from bs4 import BeautifulSoup
soup=BeautifulSoup(html, 'html.parser')
tag1 = soup.find("b")
ret = tag1.next_element.extract()
print ('Extracted:',ret)
print ('original:',soup)