A handy script used to convert Logstash testcases from a nested object to flat keys

flatten.py

import glob
import json

import flatdict

tests = glob.glob('logstash/testcases/*.json')

for test in tests:
    print(test)
    with open(test, 'r') as file:
        data = json.loads(file.read())

    for case in data['testcases']:
        for idx, expect in enumerate(case['expected']):
            d = flatdict.FlatDict(expect, delimiter='.')
            case['expected'][idx] = dict(d)

    with open(test, 'w') as file:
        json.dump(data, file, indent=2)