How to count nested json objects from a nested array in python

Question

How can I get the sum of objects count inside all movements?

Currently I'm chewing without success on this snippet below, though all my attempts digging down the nodes fail.

import json

RESULTS = 'sample.json'
with open(RESULTS) as f:
    data = json.load(f)
    results = data
print(len(results[0]['result']['movements'])) #Expected: 3

sample.json

[
  {
    "result": {
      "TempId": "369477387",
      "movements": [
        {
          "date": "2018-05-03",
          "credit": 100.0,
          "shorttext": "My<br/>Expense "
        },
        {
          "date": "2018-05-03",
          "debit": 200.0,
          "shorttext": "My<br/>F\u00dcR"
        }
      ]
    }
  },
  {
    "result": {
      "TempId": "369477395",
      "movements": []
    }
  },
  {
    "result": {
      "TempId": "369477402",
      "movements": [
        {
          "date": "2018-05-07",
          "credit": 100.0,
          "shorttext": "My<br/>Expense "
        }
      ]
    }
  }
]

Answer 1

Using a list comprehension you can find out the number of movements from every element from sample list.

Then just apply sum method over count list in order to find out the sum.

count = sum([len(item['result']['movements']) for item in sample])

Output

>> count
3