需要帮助查找 CSS 选择器

Question

网址：https://www.goodreads.com/book/show/985873.A_Game_of_Thrones

图书评分旁边有一个“评分详情”按钮。我试图找到 css 选择器来获取整个表格的文本，但我没有成功。有人能帮我吗？没有错误，只是没有得到我想要的文本

代码：

    book_url <- 
    read_html("https://www.goodreads.com/book/show/985873.A_Game_of_Thrones")

    book_url %>%
      html_node("table#rating_distribution") %>%
      html_text()

Answer 1

数据位于被 CData 屏蔽的脚本标记内。您可以正则表达式出所需的 html，然后使用 html 解析器重新解析。

library(rvest)
library(magrittr)
library(stringr)
library(stringi)

t <- read_html('https://www.goodreads.com/book/show/985873.A_Game_of_Thrones') %>% html_text()
y <- gsub('\n|\\s+',' ',stri_unescape_unicode(t[[1]][1]))
z <- str_match_all(y,'rating_details_tip\'\\), "(.*)", \\{')
tables <- read_html(z[[1]][,2])  %>% html_nodes("table") %>% html_table(fill=T)
table1 <- data.frame(tables[1])  %>% subset(., select=-c(2))
table2 <- data.frame(tables[2])

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如果有兴趣，我先用python写

import requests, re
from bs4 import BeautifulSoup as bs
import pandas as pd

r = requests.get('https://www.goodreads.com/book/show/985873.A_Game_of_Thrones')
p = re.compile(r'rating_details\'\), "(.*)", {')
s = p.findall(r.text)[0].encode().decode('unicode_escape')
s = re.sub(r'\n+\s+|\\','',s )
soup = bs(s, 'lxml')
dfs = pd.read_html(str(soup.select('table')))
print(dfs)