如何使用Python中的Beautiful Soup在HTML页面中查找特定单词？

Question

如何使用Python中的Beautiful Soup在HTML页面中查找特定单词？

5

我想要通过Beautiful Soup在HTML文本中查找一个特定单词出现的次数。我尝试使用findAll函数，但它只能找到特定标签内的单词，例如soup.body.findAll只会在标签内查找特定单词，而我想要搜索所有标签内的该单词。此外，一旦找到该单词，我需要创建一个列表，其中包含该单词前后的单词。请问是否有人能够帮助我？谢谢。

- Kanika Singh

可能是重复的问题：使用BeautifulSoup搜索HTML字符串 - Ritave

不，这不是重复的，我已经检查过了。 - Kanika Singh

1个回答

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- Ritave · Accepted Answer

根据最新的BeautifulSoup 4 api，您可以使用“recursive”关键字在整个树中查找文本。然后，您将获得字符串，可以对其进行操作并分离单词。

这是一个完整的示例：

import bs4
import re

data = '''
<html>
<body>
<div>today is a sunny day</div>
<div>I love when it's sunny outside</div>
Call me sunny
<div>sunny is a cool word sunny</div>
</body>
</html>
'''

searched_word = 'sunny'

soup = bs4.BeautifulSoup(data, 'html.parser')
results = soup.body.find_all(string=re.compile('.*{0}.*'.format(searched_word)), recursive=True)

print 'Found the word "{0}" {1} times\n'.format(searched_word, len(results))

for content in results:
    words = content.split()
    for index, word in enumerate(words):
        # If the content contains the search word twice or more this will fire for each occurence
        if word == searched_word:
            print 'Whole content: "{0}"'.format(content)
            before = None
            after = None
            # Check if it's a first word
            if index != 0:
                before = words[index-1]
            # Check if it's a last word
            if index != len(words)-1:
                after = words[index+1]
            print '\tWord before: "{0}", word after: "{1}"'.format(before, after)

它输出：

Found the word "sunny" 4 times

Whole content: "today is a sunny day"
    Word before: "a", word after: "day"
Whole content: "I love when it's sunny outside"
    Word before: "it's", word after: "outside"
Whole content: "
Call me sunny
"
    Word before: "me", word after: "None"
Whole content: "sunny is a cool word sunny"
    Word before: "None", word after: "is"
Whole content: "sunny is a cool word sunny"
    Word before: "word", word after: "None"

也可以在这里查看字符串关键字参考资料