将一个数组添加到JSON Python中

Question

我正在使用Python3处理JSON，我想将一个数组添加到JSON对象中，这是我的代码：

values = [20.8, 21.2, 22.4] 
timeStamps = ["2013/25/11 12:23:20", "2013/25/11 12:25:20", "2013/25/11 12:28:20"] 

myJSON = '{ Gateway: {"serial":"1001", "status":"ok"},
 "Tag":{"TID":"FF01", "EPC":"EE01"},
 "DataSet":{"sensorType":"temperature", "values":[], "timeStamps":[] } }'

有没有一种简单的方法可以将数组追加而不必将它们转换为字符串并作为纯文本插入？

提前致谢，

- oaurbanov

---

使用JSON库？ - Anton vBR

那个老旧痛苦的http://www.codeskulptor.org/#user43_Jf9PvdGZQ5_0.py - Hackerman

Answer 1

Python通过json模块包含了SimpleJSON。使用它可以将JSON字符串和python字典进行序列化/反序列化：

myJSON_d = json.loads(myJSON)

myJSON_d.['DataSet'].update({'values': values, 'timeStamps': timeStamps})

myJSON = json.dumps(myJSON_d)

- cowbert

Answer 2

你可以使用json.loads解析JSON，进行操作，然后通过json.dumps转换回JSON。

请注意，我不得不编辑你的JSON使其有效。（“Gateway”缺少封闭双引号。）

import json

values = [20.8, 21.2, 22.4] 
timeStamps = ["2013/25/11 12:23:20", "2013/25/11 12:25:20", "2013/25/11 12:28:20"] 

myJSON = '{ "Gateway": {"serial":"1001", "status":"ok"}, "Tag":{"TID":"FF01", "EPC":"EE01"}, "DataSet":{"sensorType":"temperature", "values":[], "timeStamps":[] } }'

o = json.loads(myJSON)
o["DataSet"]["values"] = values
o["DataSet"]["timeStamps"] = timeStamps

newJSON = json.dumps(o)

print(newJSON)

# Output:
# {"Gateway": {"serial": "1001", "status": "ok"}, "Tag": {"TID": "FF01", "EPC": "EE01"}, "DataSet": {"sensorType": "temperature", "values": [20.8, 21.2, 22.4], "timeStamps": ["2013/25/11 12:23:20", "2013/25/11 12:25:20", "2013/25/11 12:28:20"]}}

- user94559

Answer 3

看起来你也在尝试构建json。如果是这样，你应该这样做：

import json

values = [20.8, 21.2, 22.4] 
timeStamps = ["2013/25/11 12:23:20", "2013/25/11 12:25:20", "2013/25/11 12:28:20"] 

d = dict(Gateway= dict(serial="1001", status="ok"),
     Tag= dict(TID="FF01", EPC= "EE01"),
     DataSet= dict(sensorType="temperature",values=values,timeStamps=timeStamps))

print(json.dumps(d,indent =2))

返回：

{
  "DataSet": {
    "timeStamps": [
      "2013/25/11 12:23:20",
      "2013/25/11 12:25:20",
      "2013/25/11 12:28:20"
    ],
    "values": [
      20.8,
      21.2,
      22.4
    ],
    "sensorType": "temperature"
  },
  "Tag": {
    "TID": "FF01",
    "EPC": "EE01"
  },
  "Gateway": {
    "serial": "1001",
    "status": "ok"
  }
}

- Anton vBR