如何在列表中附加元素并将其写入JSON？

Question

1. 将JSON文件加载到开头的aPool列表中。你知道吗

   def LoadPoolTemplate():
     sFilename = './pool_template.json'
   
     if os.path.exists(sFilename):
       with open(sFilename, 'r') as fJsonFile:
         aPool = json.load(fJsonFile)
   
     return aPool
   

2. 将aTempJson附加到aPool[index]['devices']

   def UpdateJSON(aPool, aDevList):
     sFilename = './device_template.json'
     if os.path.exists(sFilename):
       with open(sFilename, 'r') as fJsonFile:
         aTempJson = json.load(fJsonFile)
     else:
       print ("No such file names " + sFilename)
   
     for item in aDevList:
       aTempJson['id'] = item[1]
       aTempJson['atti']['high'] = item[2]
   
       for (i,pid) in enumerate(aPool):
         if pid['id'] == item[0]:
           aPool[i]['devices'].append(aTempJson)
           break
   

3. 将aPool列表更新为JSON文件

   def CreateDeviceJSON(aDevice):
     with open(gDevice, 'w') as fOutfile:
       json.dump(aDevice, fOutfile, indent=2)
   

4. 阅读列表

   def ReadDeviceList():
     aDevList = []
   
     with open(gDevList, 'r') as fList:
       for line in fList:
         columns = line.strip().split(',')
         aDevList.append(columns)
   
     return aDevList
   

5. 主要功能

   def main():
     aDevDist = []
     aDeviceJson = []
   
     aDeviceJson = LoadPoolTemplate()
     aDeviceList = ReadDeviceList()
     aDeviceJson = UpdateJSON(aDeviceJson, aDeviceList)
   
     CreateDeviceJSON(aDeviceJson)
   

我不知道为什么设备列表中的所有元素都一样，请帮帮我。你知道吗

JSON文件输出：

[
  {
    "id": "id1",
    "devices": [
      {
         "atti": {
          "high": "190",
          "weight": "80"
        },
        "id": "Jordan"
      },
      {
         "atti": {
          "high": "190",
          "weight": "80"
        },
        "id": "Jordan"
      },
      {
         "atti": {
          "high": "190",
          "weight": "80"
        },
        "id": "Jordan"
      }
    ]
  },
  {
    "id": "id2",
    "devices": [
      {
         "atti": {
          "high": "190",
          "weight": "80"
        },
        "id": "Jordan"
      }
    ]
  },
  {
    "id": "id3",
    "devices": [
      {
         "atti": {
          "high": "190",
          "weight": "80"
        },
        "id": "Jordan"
      }
    ]
  }
]

输入源如下：

["id1", "apple", "167"]
["id1", "carter", "203"]
["id1", "jason", "188"]
["id2", "paul", "178"]
["id3", "Jordan", "190"]

池模板

[
  {
    "id": "id1",
    "devices": [
    ]
  },
  {
    "id": "id2",
    "devices": [
    ]
  },
  {
    "id": "id3",
    "devices": [
    ]
  }
]

Answer 1

此处：

for item in aDevList:
    aTempJson['id'] = item[1]
    aTempJson['atti']['high'] = item[2]

    for (i,pid) in enumerate(aPool):
      if pid['id'] == item[0]:
        aPool[i]['devices'].append(aTempJson)
        break

您正在修改相同的aTempJsondict，并将其反复附加到列表中。你要做的是为每个项目创建一个新的dict。你知道吗