如何从python中返回的json文件中获取特定密钥？

我在python中从json文件获取某个密钥时遇到问题。我真的不知道从哪里开始，因为我以前从未在python中使用json

[
  {
    "author": "Chinua Achebe",
    "country": "Nigeria",
    "imageLink": "images/things-fall-apart.jpg",
    "language": "English",
    "link": "https://en.wikipedia.org/wiki/Things_Fall_Apart\n",
    "pages": 209,
    "title": "Things Fall Apart",
    "year": 1958
  },
  {
    "author": "Hans Christian Andersen",
    "country": "Denmark",
    "imageLink": "images/fairy-tales.jpg",
    "language": "Danish",
    "link": "https://en.wikipedia.org/wiki/Fairy_Tales_Told_for_Children._First_Collection.\n",
    "pages": 784,
    "title": "Fairy tales",
    "year": 1836
  }
]

这是json文件中的几行代码作为示例

import json
f = open('**\\booksset1.json')
data = json.load(f)

---

这一部分加载json文件，但是如何从整个文件中获取一个标题。

使用for循环访问键和值。 比如说

import json
f = open('**\\booksset1.json')
data = json.load(f)

Print First item title: 

print data[0]['title']
To iterate all the of the author details
for d in data:
   print d['author]
   print d['title']

---

json.load

已将文本字符串表示形式转换为（在本例中）DICT列表。因此，要访问第二个（童话故事）的

年份，请使用

您可以执行所有常见的python操作，例如迭代列表中的所有dict：

for d in data:
    author, title, date = d['author'], d['title'], d['year']
    print( f'{author} wrote "{title}" in {year}') 

如果您仍然有问题，请尝试使用

以下是您可以使用的一些其他技巧：

f[0]["author"] = "Foo Man" # Set the value
f.json() # Get object from the JSON file

您可以找到更多信息。
这将使您基本了解如何在python中使用JSON

import json
f = open('booksset1.json')
data = json.load(f)
# for single 
print("Aurthor name :",data[0]['author'])
print("Country name :",data[0]['country'])
print()
# for multiple you should use loop
for i in data:
    print(i['title'])

您可以使用该函数从字典列表中获取键的值，如下所示：

data = [
  {
    "author": "Chinua Achebe",
    "country": "Nigeria",
    "imageLink": "images/things-fall-apart.jpg",
    "language": "English",
    "link": "https://en.wikipedia.org/wiki/Things_Fall_Apart\n",
    "pages": 209,
    "title": "Things Fall Apart",
    "year": 1958
  },
  {
    "author": "Hans Christian Andersen",
    "country": "Denmark",
    "imageLink": "images/fairy-tales.jpg",
    "language": "Danish",
    "link": "https://en.wikipedia.org/wiki/Fairy_Tales_Told_for_Children._First_Collection.\n",
    "pages": 784,
    "title": "Fairy tales",
    "year": 1836
  }
]

titles = [item.get("title", "") for item in data]

输出：

['Things Fall Apart', 'Fairy tales']

如果您喜欢在数据框中使用此数据，并且由于数据的行为类似于字典列表，您可以尝试：

import pandas as pd

df = pd.DataFrame.from_dict(data)

df

                    author  country  ...               title  year
0            Chinua Achebe  Nigeria  ...   Things Fall Apart  1958
1  Hans Christian Andersen  Denmark  ...         Fairy tales  1836

您的
数据
是一个dict列表，类似于JSON中的dict。您可以获得第一个标题，就像正常的目录列表一样：
data[0]['title']
data = [
  {
    "author": "Chinua Achebe",
    "country": "Nigeria",
    "imageLink": "images/things-fall-apart.jpg",
    "language": "English",
    "link": "https://en.wikipedia.org/wiki/Things_Fall_Apart\n",
    "pages": 209,
    "title": "Things Fall Apart",
    "year": 1958
  },
  {
    "author": "Hans Christian Andersen",
    "country": "Denmark",
    "imageLink": "images/fairy-tales.jpg",
    "language": "Danish",
    "link": "https://en.wikipedia.org/wiki/Fairy_Tales_Told_for_Children._First_Collection.\n",
    "pages": 784,
    "title": "Fairy tales",
    "year": 1836
  }
]

titles = [item.get("title", "") for item in data]

['Things Fall Apart', 'Fairy tales']

import pandas as pd

df = pd.DataFrame.from_dict(data)

df

                    author  country  ...               title  year
0            Chinua Achebe  Nigeria  ...   Things Fall Apart  1958
1  Hans Christian Andersen  Denmark  ...         Fairy tales  1836