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我是电晕的新手，我在解析来自电晕 sdk 中服务器的 JSON 数据时遇到问题。数据在响应中正确来自服务器并正在打印。解析时，我的变量中没有数据。它要么不显示任何数据，要么显示零值。

这是我的json数据结构：

{
    "status":"success",
    "data":{
    "marks":[
    {
    "Marks":{
    "first_name":"Amit",
    "last_name":"Sharma",
    "country_id":"20",
    "Physics":"50",
    "Chemistry":"35",
    "Mathematics":"40"
   }
},
   {
    "Marks":{
    "first_name":"Amit",
    "last_name":"Yadav",
    "country_id":"21",
    "Physics":"50",
    "Chemistry":"35",
    "Mathematics":"40"
    }
},
    {
    "Marks":{
    "first_name":"Pankaj",
    "last_name":"Shukla",
    "country_id":"22",
    "Physics":"50",
    "Chemistry":"35",
    "Mathematics":"40"
    }
},
    {
    "Marks":{
    "first_name":"Abhishek",
    "last_name":"Tiwari",
    "country_id":"25",
    "Physics":"50",
    "Chemistry":"35",
    "Mathematics":"40"
    }
},
    {
    "Marks":{
    "first_name":"Kashif",
    "last_name":"Khan",
    "country_id":"20",
    "Physics":"50",
    "Chemistry":"35",
    "Mathematics":"40"
    }
},
{
    "Marks":{
    "first_name":"Ankit",
    "last_name":"Sharma",
    "country_id":"19",
    "Physics":"50",
    "Chemistry":"35",
    "Mathematics":"40"
    }
},
{
    "Marks":{
    "first_name":"Rahul",
    "last_name":"Vishwakarma",
    "country_id":"27",
    "Physics":"50",
    "Chemistry":"35",
    "Mathematics":"40"
    }
},
{
    "Marks":{
    "first_name":"Amit",
    "last_name":"Tiwari",
    "country_id":"30",
    "Physics":"50",
    "Chemistry":"35",
    "Mathematics":"40"
    }
},
{
    "Marks":{
    "first_name":"Amit",
    "last_name":"Sharma",
    "country_id":"78",
    "Physics":"50",
    "Chemistry":"35",
    "Mathematics":"40"
    }
},
{
    "Marks":{
    "first_name":"Amit",
    "last_name":"Sharma",
    "country_id":"23",
    "Physics":"50",
    "Chemistry":"35",
    "Mathematics":"40"
    }
   }
  ]
 }
}

如何复制变量中的 json 数据并将其显示在电晕中，这是我的 json 数据代码

  function networkListener(event)
       if(event.isError) then 
         native.setActivityIndicator(false)
         print("Network Error")
        local ErrText=display.newText(....)
       else 
         native.setActivityIndicator(false)
         print("Response".. event.response)
         data=json.decode(event.response)
         for i=1,#data do
         local fname=data.score[i].scores.first_name
         print(fname)
     end
   end
   end
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