["python","json","count","element"]
How to count items in JSON data

How I can get the number of elements in node of JSON data? JSON: { "result":[ { "run":[ { "action":"stop" }, { "action":"start" }, { "action":"start" } ], "find":true } ] } I need to get the number of elements from node data['result'][0]['run']. It should be 3, but I can't find how to do it in Python.
import json json_data = json.dumps({ "result":[ { "run":[ { "action":"stop" }, { "action":"start" }, { "action":"start" } ], "find": "true" } ] }) item_dict = json.loads(json_data) print len(item_dict['result'][0]['run']) Convert it into Python dictionary