不能报废 来自PDB数据库网站

Question

我是一个新的webscraping，并试图达到每个pdb ID的pdb网页，如。

url= https://www.rcsb.org/search?request=%7B%22query%22%3A%7B%22parameters%22%3A%7B%22attribute%22%3A%22rcsb_entity_source_organism.rcsb_gene_name.value%22%2C%22operator%22%3A%22exact_match%22%2C%22value%22%3A%22MCF3%22%7D%2C%22type%22%3A%22terminal%22%2C%22service%22%3A%22text%22%2C%22node_id%22%3A0%7D%2C%22return_type%22%3A%22entry%22%2C%22request_options%22%3A%7B%22pager%22%3A%7B%22start%22%3A0%2C%22rows%22%3A100%7D%2C%22scoring_strategy%22%3A%22combined%22%2C%22sort%22%3A%5B%7B%22sort_by%22%3A%22score%22%2C%22direction%22%3A%22desc%22%7D%5D%7D%2C%22request_info%22%3A%7B%22src%22%3A%22ui%22%2C%22query_id%22%3A%22c75bbf18a058a812f5384f297528d4b6%22%7D%7D

在这里，我试图获得ID，如： "3ZBF"和 "4UXL".

我写了下面的代码。

url='https://www.rcsb.org/search?request=%7B%22query%22%3A%7B%22parameters%22%3A%7B%22attribute%22%3A%22rcsb_entity_source_organism.rcsb_gene_name.value%22%2C%22operator%22%3A%22exact_match%22%2C%22value%22%3A%22MCF3%22%7D%2C%22type%22%3A%22terminal%22%2C%22service%22%3A%22text%22%2C%22node_id%22%3A0%7D%2C%22return_type%22%3A%22entry%22%2C%22request_options%22%3A%7B%22pager%22%3A%7B%22start%22%3A0%2C%22rows%22%3A100%7D%2C%22scoring_strategy%22%3A%22combined%22%2C%22sort%22%3A%5B%7B%22sort_by%22%3A%22score%22%2C%22direction%22%3A%22desc%22%7D%5D%7D%2C%22request_info%22%3A%7B%22src%22%3A%22ui%22%2C%22query_id%22%3A%22c75bbf18a058a812f5384f297528d4b6%22%7D%7D'

page = requests.get(url)

data = page.text

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

tex_tag= soup.find('div',{"class":"container","id":"maincontentcontainer"})

new_line=tex_tag.find("div",{"id":"search-container"})

print(new_line)

print(tex_tag.prettify())

这里，我看不到< div id="search-container">里面的内容。我检查了网页上的html文件，pdb的IDS在< div id="search-container" >里面。

你能不能给我一个解决方案，或者给我一个见解，让我如何解决这个问题。

先谢谢你。

Answer 1

这个网站在渲染之前使用了一个API来获取结果。它来自于这个url 。

POST https://www.rcsb.org/search/gql

用JSON输入的标识符列表。

import requests

ids = ["3ZBF","4UXL"]

r = requests.post("https://www.rcsb.org/search/gql",
    json = {
        "attributes": None,
        "identifiers": ids,
        "returnType": "entry",
        "report": "search_summary"
    })

print(r.json()) 

Answer 2

这个脚本将根据你的搜索URL打印所有标识符。

import json
import requests
import urllib.parse


url = 'https://www.rcsb.org/search?request=%7B%22query%22%3A%7B%22parameters%22%3A%7B%22attribute%22%3A%22rcsb_entity_source_organism.rcsb_gene_name.value%22%2C%22operator%22%3A%22exact_match%22%2C%22value%22%3A%22MCF3%22%7D%2C%22type%22%3A%22terminal%22%2C%22service%22%3A%22text%22%2C%22node_id%22%3A0%7D%2C%22return_type%22%3A%22entry%22%2C%22request_options%22%3A%7B%22pager%22%3A%7B%22start%22%3A0%2C%22rows%22%3A100%7D%2C%22scoring_strategy%22%3A%22combined%22%2C%22sort%22%3A%5B%7B%22sort_by%22%3A%22score%22%2C%22direction%22%3A%22desc%22%7D%5D%7D%2C%22request_info%22%3A%7B%22src%22%3A%22ui%22%2C%22query_id%22%3A%22c75bbf18a058a812f5384f297528d4b6%22%7D%7D'
search_link = 'https://www.rcsb.org/search/data'

json_data = url.split('=')[-1]
json_data = json.loads(urllib.parse.unquote(json_data))

data = requests.post(search_link, json=json_data).json()

# uncomment this to print all data:
# print(json.dumps(data, indent=4))

for r in data['result_set']:
    print(r['identifier'])

打印。

3ZBF
4UXL