当存在多个json时，从<script>标记内的json提取文本

Question

我试图从https://www.truthorfiction.com/are-americans-annually-healthcare-undocumented/中提取评级，以便从HTML代码中提取“ratingValue”和“alternateName”字段：

<script type=application/ld+json>{
"@context": "http://schema.org",
"@type": "ClaimReview",
"datePublished": "2019-01-03 ",
"url": "https://www.truthorfiction.com/are-americans-annually-healthcare-undocumented/",
"author": {
    "@type": "Organization",
    "url": "https://www.truthorfiction.com/",
    "image": "https://dn.truthorfiction.com/wp-content/uploads/2018/10/25032229/truth-or-fiction-logo-tagline.png",
    "sameAs": "https://twitter.com/whatstruecom"
},
"claimReviewed": "More Americans die every year from a lack of affordable healthcare than by terrorism or at the hands of undocumented immigrants.",
"reviewRating": {
    "@type": "Rating",
    "ratingValue": -1,
    "worstRating":-1,
    "bestRating": -1,
    "alternateName": "True"
},
    "itemReviewed": {
    "@type": "CreativeWork",
    "author": {
        "@type": "Person",
        "name": "Person",
        "jobTitle": "",
        "image": "",
        "sameAs": [
            ""
        ]
    },
    "datePublished": "",
    "name": ""
}
}</script>

我尝试使用以下代码来实现这一点：

import json
from bs4 import BeautifulSoup

slink = 'https://www.truthorfiction.com/are-americans-annually-healthcare-undocumented/'
response = http.request('GET', slink)
soup = BeautifulSoup(response.data)
tmp = json.loads(soup.find('script', type='application/ld+json').text)

然而，tmp却显示了一个字典，其中包含了“application/ld+json”项，它来自于我要提取的分级之前的位，我想知道如何循环或循环到存储分级的脚本的相关部分。你知道吗

Answer 1

您需要使用键访问元素。你知道吗

rating_value = tmp['reviewRating']['ratingValue'] # -1
alternate_name = tmp['reviewRating']['alternateName'] # 'True'

或者

review_rating = tmp['reviewRating']
rating_value = review_rating['ratingValue'] # -1
alternate_name = review_rating['alternateName'] # 'True'

Answer 2

它有2个<script type=application/ld+json>您可以从find_all()中选择第二个索引

tmp = json.loads(soup.find_all('script', type='application/ld+json')[1].text)

或者循环并搜索是否包含字符串

tmp = None
for ldjson in soup.find_all('script', type='application/ld+json'):
    if 'ratingValue' in ldjson.text:
        tmp = json.loads(ldjson.text)