TypeError: string indices must be integers, while trying to convert json into csv

Question

我在运行下面的代码

时收到这个错误

import json
import csv
with open ("sample-json-file.json") as file:
    data = json.load(file)
    
fname = "output.csv"

with open(fname,"w") as file:
    csv_file =csv.writer(file)
    csv_file.writerow(["Name", "Mobile", "Boolean", "Country"])
    for item in data:
        csv_file.writerow([item['name'], item['mobile'], item['boolean'], item['country']])

我的json文件有以下内容-

{
   "Name": "Test",
   "Mobile": 12345678,
   "Boolean": "true",
   "Pets": ["Dog", "cat"],
   "country" : "India"
}

请提出修改意见，不胜感激

回溯

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-36-9719807e095c> in <module>
      8     csv_file.writerow(["Name", "Mobile", "Boolean", "Country"])
      9     for item in data:
---> 10         csv_file.writerow([item['name'], item['mobile'], item['boolean'], item['country']])

TypeError: string indices must be integers

Answer 1

如果数据是文件中的单个`dict`

给定本例中的数据
使用您提供的代码
for item in data: 不是必需的，因为您已经在从数据中写入密钥并且没有任何可迭代的内容。

with open ("test.json") as file:
    data = json.load(file)
    
fname = "output.csv"

with open(fname,"w") as file:
    csv_file =csv.writer(file)
    csv_file.writerow(["Name", "Mobile", "Boolean", "Country"])
    csv_file.writerow([data['Name'], data['Mobile'], data['Boolean'], data['country']])

如果数据是文件中`dicts`的`list`条，如下：

[ {
        "Name": "Test",
        "Mobile": 12345678,
        "Boolean": "true",
        "Pets": ["Dog", "cat"],
        "country": "India"
    }, {
        "Name": "Test",
        "Mobile": 12345678,
        "Boolean": "true",
        "Pets": ["Dog", "cat"],
        "country": "India"
    }]

现在 for item in data: 需要遍历列表中的每个 dict

with open ("test.json") as file:
    data = json.load(file)

fname = "output.csv"

with open(fname,"w") as file:
    csv_file =csv.writer(file)
    csv_file.writerow(["Name", "Mobile", "Boolean", "Country"])
    for item in data:
        csv_file.writerow([item['Name'], item['Mobile'], item['Boolean'], item['country']])

Answer 2

您的示例 json 是单个 dict。当您尝试迭代它时，您会得到字典键（在您的例子中是字符串），当然 "name"["name"] 不是问题。您可以删除 for 循环（它只是 1 个字典，而不是字典列表）和 writerow(data['nmae'], ..) 但是 csv 有一个 DictWriter class 可以改用.

import json
import csv
with open ("sample-json-file.json") as file:
    data = json.load(file)

fname = "output.csv"

fieldnames = ["Name", "Mobile", "Boolean", "Country"]

with open(fname,"w") as file:
    csv_file =csv.DictWriter(file, fieldnames=fieldnames, extrasaction='ignore')
    csv_file.writeheader()
    csv_file.writerow(data)

TypeError: string indices must be integers, while trying to convert json into csv

TypeError: string indices must be integers, while trying to convert json into csv

python

csv

json

jupyter-notebook

jupyter-lab

回溯

如果数据是文件中的单个`dict`

如果数据是文件中`dicts`的`list`条，如下：

TypeError: string indices must be integers, while trying to convert json into csv

TypeError: string indices must be integers, while trying to convert json into csv

python

csv

json

jupyter-notebook

jupyter-lab

回溯

如果数据是文件中的单个dict

如果数据是文件中dicts的list条，如下：

如果数据是文件中的单个`dict`

如果数据是文件中`dicts`的`list`条，如下：