beautifulsoup Web爬网搜索ID列表

Question

我正在尝试抓取ncbi eutils webpage。我要从网上抓取ID列表，如下所示：

这是它的代码：

  import requests
  from bs4 import BeautifulSoup  

  def get_html(url):  
      """get the content of the url"""  
      response = requests.get(url)
      response.encoding = 'utf-8'  
      return response.text  


  def get_pmid(html):   
      soup = BeautifulSoup(html, 'lxml')
      for texts in soup.select('body'):
          text = texts.get_text()
          print text

  url_ncbi = "https://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi?db=pubmed&term=%22D-PANTOTHENIC+ACID%22&retmax=2000&usehistory=y&field=Title/Abstracts"  
  html = get_html(url_ncbi)
  get_pmid(html)

我想使用select函数获取文本，但是找不到脚本的正确代码：soup.select(' ')中的文本。

我对Web代码中的多层类和ID感到困惑，如下所示：

Answer 1

要获取所有ID标签，可以使用find_all()函数：

import requests
from bs4 import BeautifulSoup  


def get_html(url):  
  """get the content of the url"""  
  response = requests.get(url)
  response.encoding = 'utf-8'  
  return response.text  


def get_pmid(html):   
    soup = BeautifulSoup(html, 'lxml') 
    rv = []
    for id_tag in soup.find_all('id'):
        rv.append(id_tag.text)
    return rv

url_ncbi = "https://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi?db=pubmed&term=%22D-PANTOTHENIC+ACID%22&retmax=2000&usehistory=y&field=Title/Abstracts"  
html = get_html(url_ncbi)
all_ids = get_pmid(html)
print(all_ids)

打印：

['29737393', '29209902', '24632028', '23727638', '22536244', '22052867', '15371742', '12204559', '10885798', '16348362', '3096335', '3734807', '6247641', '6997858', '761345', '108510', '355840', '1003285', '4676550', '5804470', '6076800', '6076775', '6012920', '14091285']