Beautiful Soup 中是否有一个功能可以让您找到特定 <p> 标记的索引答案

【问题标题】：Is there a function in Beautiful soup that allows you to find the index of a specific <p> tagBeautiful Soup 中是否有一个功能可以让您找到特定 <p> 标记的索引
【发布时间】：2021-07-22 00:43:29
【问题描述】：

我想获取打击乐列表中第一个对象的<p> 标签的索引。怎么做呢？

from bs4 import BeautifulSoup
import re


data = '''
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Instruments</title>
</head>
<body>
    <p> Guitars are string instruments </p>
    <p> Saxophones are woodwind instruments </p>
    <p> Drums are percussion instruments </p>
    <p> Pianos are percussion instruments</p>
</body>
'''

soup = BeautifulSoup(data)
pattern = '(?=.*percussion).*'
percussion = soup.findAll(string=re.compile(pattern))
print(percussion[0].parent.name]

【问题讨论】：

标签： python html indexing beautifulsoup tags

【解决方案1】：

使用.index 方法。例如：

from bs4 import BeautifulSoup


data = """
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Instruments</title>
</head>
<body>
    <p> Guitars are string instruments </p>
    <p> Saxophones are woodwind instruments </p>
    <p> Drums are percussion instruments </p>
    <p> Pianos are percussion instruments</p>
</body>
"""

soup = BeautifulSoup(data, "html.parser")

percussion_p = soup.find("p", text=lambda t: "percussion" in t)
all_p = soup.find_all("p")

print('Index of <p> with text "percussion" is:', all_p.index(percussion_p))

打印（0-indexed）：

Index of <p> with text "percussion" is: 2

【讨论】：