Python JSON解析器和过滤器每次都得到一个KeyError

Question

我正在编写一个程序，该程序应该过滤 URL 中 JSON 文件内容的特定结果。 我想过滤掉任何名称为“ Andromeda<\/strong><\/em> ”的描述<\/strong><\/em>、关键字<\/strong><\/em>和标题<\/strong><\/em>。 我编写了程序，它确实在某些页面上运行，而在其他页面上，我不断收到错误，我不知道为什么。 这是我的代码：

from urllib.request import urlopen
import json

#Page = (number change)
url = "https://images-api.nasa.gov/search?q=galaxy&page=10"

response = urlopen(url)
data_json = json.loads(response.read())
#Filtering out the results that relate to the word
planets = [i for i in data_json['collection']['items'] if 'Andromeda' in i['data'][0]['title']]
planets1 = [i for i in data_json['collection']['items'] if 'Andromeda' in i['data'][0]['keywords']]
planets2 = [i for i in data_json['collection']['items'] if 'Andromeda' in i['data'][0]['description']]
print(planets)
print("--------------------------------------------")
print(planets1)
print("--------------------------------------------")
print(planets2)

Answer 1

这将跳过那些在数据字典中没有“关键字”的帖子

from urllib.request import urlopen
import json

#Page = (number change)
url = "https://images-api.nasa.gov/search?q=galaxy&page=10"

response = urlopen(url)
data_json = json.loads(response.read())
#Filtering out the results that relate to the word
planets = [i for i in data_json['collection']['items'] if 'Andromeda' in i['data'][0]['title']]
planets1 = [i for i in data_json['collection']['items'] if 'keywords' in i['data'][0] and 'Andromeda' in i['data'][0]['keywords']]
planets2 = [i for i in data_json['collection']['items'] if 'Andromeda' in i['data'][0]['description']]
print(planets)
print("--------------------------------------------")
print(planets1)
print("--------------------------------------------")
print(planets2)