不能使用BeautifulSoup获取整个<li>行

BeautifulSoup is a popular Python library used for web scraping and parsing HTML or XML documents. It provides a convenient way to extract data from web pages by navigating the HTML/XML tree structure. However, in this scenario, we are asked not to use BeautifulSoup to extract the entire <li> element.

To achieve the desired result without using BeautifulSoup, we can utilize other methods and modules available in Python. One approach is to use regular expressions (regex) to extract the content of the <li> element. Here's an example code snippet:

import re

html = """<ul>
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3</li>
</ul>"""

# Use regex pattern to match the <li> element
pattern = r"<li>(.*?)</li>"
matches = re.findall(pattern, html, re.DOTALL)

# Print the extracted content of each <li> element
for match in matches:
    print(match)

In this code, we define a regex pattern r"<li>(.*?)</li>" which matches any text enclosed between <li> and </li>. The re.findall() function is then used to find all matches of this pattern within the HTML string.

The output of the above code will be:

Item 1
Item 2
Item 3

This approach allows us to extract the content of each <li> element without relying on BeautifulSoup. It provides a flexible way to handle HTML parsing when other libraries are not allowed.

Please note that this answer is specifically tailored to the restriction of not using BeautifulSoup to extract the entire <li> element. In real-world scenarios, where library restrictions are not imposed, BeautifulSoup remains a powerful tool for web scraping and should be considered for such tasks.