code: def get_in(record, *keys, **kwargs):
      
      default = kwargs.get('default', None)
      return reduce(lambda a, x: a.get(x, default), keys, record)
docs: Return the value corresponding to the keys in a nested record
  
      :param record: a dictionary
      :param keys: strings
      :param kwargs: keywords
      :returns: the value for the keys
  
      >>> d = {'id': {'name': 'Lancelot', 'actor': 'John Cleese', 'color': 'blue'}}
      >>> get_in(d, 'id', 'name')
      'Lancelot'
  
      >>> get_in(d, 'id', 'age', default='?')
      '?'