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

You could also use a generator to search the object after json.load().

Code example from my answer here: https://stackoverflow.com/a/39016088/5250939

def item_generator(json_input, lookup_key):
    if isinstance(json_input, dict):
        for k, v in json_input.iteritems():
            if k == lookup_key:
                yield v
            else:
                for child_val in item_generator(v, lookup_key):
                    yield child_val
    elif isinstance(json_input, list):
        for item in json_input:
            for item_val in item_generator(item, lookup_key):
                yield item_val