如何使用 BeautifulSoup 替换 ```td``` 标签内的 ```img``` 标签？

Question

我正在尝试使用 python3.8.7 和 BeautifulSoup4.9.3 解析一个充满表格的网页，以便我可以在电报频道上显示它。我可以从网页中获取所有必需的表格，但在这些表格的深处有td 标签，其中包含img 标签和需要用p 标签替换的星号src。这些是到目前为止的代码：

import pickle
import bs4 as bs

v_file = open('data/pickled_data/pickled_v', 'rb')
v_pickled = pickle.load(v_file)

v_soup = bs.BeautifulSoup(v_pickled.content, "html5lib")
all_tbls = v_soup.find_all('table')

我已经尝试替换图像——也就是star_image——如下，但它返回AttributeError: 'NoneType' object has no attribute 'replace_with'：

url_2_check = "https://i.imgur.com/ffIvqVj.png"

for table in all_tbls:
    for tr in table.find_all('tr'):
        for td in table.find_all('td'):
            for star_image in td.find_all('img'):
                if star_image['src'] == url_2_check:
                    p_tag = v_soup.new_tag('p')
                    p_tag.string = ":star:"
                    td.star_image.replace_with(p_tag)

然后我尝试如下，但它返回ValueError: Cannot replace one element with another when the element to be replaced is not part of a tree：

for table in all_tbls:
    for tr in table.find_all('tr'):
        for td in table.find_all('td'):
            for star_image in td.find_all('img'):
                if star_image['src'] == url_2_check:
                    p_tag = v_soup.new_tag('p')
                    p_tag.string = ":star:"
                    td.replace_with(p_tag)

我似乎无法弄清楚我做错了什么，有人可以帮忙吗？

谢谢。

Answer 1

要解析表中的数据，可以使用以下示例：

import requests
from bs4 import BeautifulSoup


url = "https://xxviptips.blogspot.com/"
soup = BeautifulSoup(requests.get(url).content, "lxml")

for t in soup.select("table"):
    rows = t.select("tr")
    league = rows[0].get_text(strip=True)
    match, info1, info2 = [
        td.get_text(strip=True) for td in rows[1].select("td")
    ]
    rate_star = " ".join([":star:"] * len(rows[2].select("img")))

    print(
        "{:<35} {:<35} {:<10} {:<10} {:<50}".format(
            league, match, info1, info2, rate_star
        )
    )

打印：

Eng. Premier League - 19:00 GMT     Fulham - Burnley                    under 3.5  1.30       :star: :star: :star: :star:                       
Spanish Liga Primera- 19:00 GMT     Betis - Granada CF                  over 1.5   1.30       :star: :star: :star:                              
Spanish Liga Segunda- 19:00 GMT     Gijon - Lugo                        under 2.5  1.44       :star: :star: :star:                              
Spanish Liga Segunda- 17:00 GMT     Rayo Vallecano - Leganes            DC - 1/X   1.30       :star: :star: :star:                              
German Bundesliga 2- 16:00 GMT      Holstein Kiel - Hannover            DC - 1/X   1.25       :star: :star: :star: :star:                       
German Bundesliga 2- 18:30 GMT      Hamburger SV - Nurnberg             under 4.5  1.22       :star: :star: :star: :star:                       
Italian Serie B - 12:00 GMT         Pescara - Salernitana               away win   1.27       :star: :star: :star:                              
Italian Serie B- 12:00 GMT          Empoli - Lecce                      DC - 1/X   1.31       :star: :star: :star: :star:                       
Romanian Liga 1- 18:30 GMT          FCSB - FC Clinceni                  home win   1.27       :star: :star: :star: :star:                       
Romanian Liga 1- 13:45 GMT          FC Voluntari - Chindia Targoviste   under 2.5  1.38       :star: :star: :star:                              
Portuguese Prim. Liga- 19:15 GMT    Porto - Sporting Farense            home win   1.33       :star: :star: :star: :star:                       
Portuguese Prim. Liga - 17:00 GMT   Portimonense - Moreirense           under 3.5  1.25       :star: :star: :star: :star: