如何提取嵌套的 json object 值 Python

Question

Can someone please help to extract the nested json values. I have a json structure. I want to get only value from nested json excluding the key. Do we have any predefined funtcions to use

{
 'catalog': [
{
  'catalog_num': 120,
  'type': {
    'screen_inch': 18.0,
    'screen_width': 240.0,
    'screen_height': 78.0
  }
},
{
  'catalog_num': 9992,
  'type': {
    'screen_inch': 18.0,
    'screen_width': 36.0,
    'screen_height': 78.0
  }
},
{
  'catalog_num': 100,
  'type': {
    'screen_inch': 24.0,
    'screen_width': 576.0,
    'screen_height': 78.0
  }
}
 ]
}

I want the output in this format:-

{
  'catalog': [
{
  'catalog_num': 120,
    'screen_inch': 18.0,
    'screen_width': 240.0,
    'screen_height': 78.0
},
{
  'catalog_num': 9992,
    'screen_inch': 18.0,
    'screen_width': 36.0,
    'screen_height': 78.0
},
{
  'catalog_num': 100,
    'screen_inch': 24.0,
    'screen_width': 576.0,
    'screen_height': 78.0
}
 ]
 }

Is there any way to extract only values from nested json. I want the "type" to get removed from my output and add value to existing object

Answer 1

I'll assume that you're given a dictionary/list structure instead of a json-string (if it's the latter, use json.loads ). Then your question basically is

How do I convert

d = { key_1: value_1, key_2: {key_3: value_3} }

into

d = { key_1: value_1, key_3: value_3 } ?

One way to do that would be

d.update(d.pop(key_2))

Please see the docs of dict for an explanation of dict.update and dict.pop :)

Now for your use case, you'll just need to repeat that for each of the dictiories in the 'category' list, probably with a for loop.