How to find a particular json value by key?

Question

There is a json like this:

{
  \"P1\": \"ss\",
  \"Id\": 1234,
  \"P2\": {
      \"P1\": \"cccc\"
  },
  \"P3\": [
      {
          \"P1\": \"aaa\"
      }
         


        

Answer 1

Converting the JSON to Python and recursively searching is by far the easiest:

def findall(v, k):
  if type(v) == type({}):
     for k1 in v:
         if k1 == k:
            print v[k1]
         findall(v[k1], k)

findall(json.loads(a), 'P1')

(where a is the string)

The example code ignores arrays. Adding that is left as an exercise.