如何创建一个数据框以生成给定格式的json

Question

我需要从数据帧中生成一个json，但是我尝试了多种df格式，但仍然无法获得所需的json格式。

我需要的json格式是

[
    {
        "Keyword": "Red", 
        "values": [
            {
                "value": 5, 
                "TC": "Color"
            }            
        ]
    }, 
     {
        "Keyword": "Orange", 
        "values": [
            {
                "value": 5, 
                "TC": "Color"
            }            
        ]
    }, 
     {
        "Keyword": "Violet", 
        "values": [
            {
                "value": 5, 
                "TC": "Color"
            }            
        ]
    }
]

我想让df生成此json。 请帮忙。

但目前我正在获取df.to_json：

 {"Names":{"0":"Ram","1":"pechi","2":"Sunil","3":" Ravi","4":"sri"},"Values":{"0":"[{'value':2,'TC': 'TC Count'}]","1":"[{'value':2,'TC': 'TC Count'}]","2":"[{'value':1,'TC': 'TC Count'}]","3":"[{'value':1,'TC': 'TC Count'}]","4":"[{'value':1,'TC': 'TC Count'}]"}}  

Answer 1

我认为您需要：

• set_index用于不在嵌套dictionaries列
• 通过创建http://stardict.sourceforge.net/Dictionaries.php下载apply与to_dict
• reset_index中列的reset_index
• 通过to_json创建json

---

print (df)

  Keyword     TC  value
0     Red  Color      5
1  Orange  Color      5
2  Violet  Color      5

j = (df.set_index('Keyword')
        .apply(lambda x: [x.to_dict()], axis=1)
        .reset_index(name='values')
        .to_json(orient='records'))
print (j)

[{"Keyword":"Red","values":[{"TC":"Color","value":5}]},
 {"Keyword":"Orange","values":[{"TC":"Color","value":5}]},
 {"Keyword":"Violet","values":[{"TC":"Color","value":5}]}]

对于写入file ：

(df.set_index('Keyword')
   .apply(lambda x: [x.to_dict()], axis=1)
   .reset_index(name='values')
   .to_json('myfile.json', orient='records'))