verify.py

import json

content = json.loads(open('help.json').read())

d = {}

for key in content:
  if key in d:
    raise ValueError('Duplicated key {}'.format(key))
  else:
    d[key]=''
  item=content[key]
  if 'title' not in item:
    raise ValueError('Missing key : title in {}'.format(key))
  if 'description' not in item:
    raise ValueError('Missing key : description in {}'.format(key))
  if 'options' in item:
    if len(item['options']) < 1:
      raise ValueError('Empty options in {}'.format(key))
    for option in item['options']:
      if option not in content:
        raise ValueError('Missing item {} in {}'.format(option, key))
  elif 'action' not in item:
    raise ValueError('Missing action in {}'.format(key))

# Check cycle
def run(key, content, path):
  if key in path:
    raise ValueError('Cycling path {}'.format(path))
  path.append(key)
  item=content[key]
  if 'action' in item:
    path.append(item['action'])
 #   print(path)
    return None
  else:
    for option in item['options']:
      run(option, content, path.copy())

run('root', content, [])