通过python代码附加JSON文件 [英] Appending JSON file through python code

问题描述

我正在尝试创建一个函数，该函数将数据附加到json文件中，并使用已经存在的相同缩进.我创建了json文件，如下所示.

I'm trying to create a function that would append data into json file follow with same indentation which is already exist. I created json file as given below.

{
    "TableA":
        [
            {"ID": "10001", "Name": "Chandan","Age": "29"},
            {"ID": "10002", "Name": "Rajesh", "Age": "24"},
            {"ID": "10003", "Name": "Raju", "Age": "25"}
        ]
}

Python代码:

import json

# Write Data on Json file
a_dict = {"ID": "10005", "Name": "Manoj","Age": "31"}
try:
    with open('TableA.json', 'a') as f:
        json_obj = json.dump(a_dict, json.load(f),ensure_ascii=False)
        f.write(json_obj)
        f.close()
except IOError as io:
    print "ERROR: ", io


# Read data from Json File
with open('TableA.json') as data_file:    
    data = json.load(data_file)

for i in data["TableA"]:
    print "ID: \t", i["ID"]
    print "Name: \t", i["Name"]
    print "Age: \t", i["Age"]

推荐答案

您也可以选择再次写入整个json，而不是仅添加一行.

Instead of appending only one line, you can also choose to write the whole json again.

with open('TableA.json') as data_file:    
    data = json.load(data_file)
a_dict = {"ID": "10005", "Name": "Manoj","Age": "31"}
new_data = data["TableA"].append(a_dict)
with open('TableA.json','w') as f:
    f.write(json.dumps(new_data, indent=4, sort_keys=True))

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