def index_hydrate(params, container, cli_type, key, value):
    """
    Hydrate an index-field option value to construct something like::

        {
            'index_field': {
                'DoubleOptions': {
                    'DefaultValue': 0.0
                }
            }
        }
    """
    if 'IndexField' not in params:
        params['IndexField'] = {}

    if 'IndexFieldType' not in params['IndexField']:
        raise RuntimeError('You must pass the --type option.')

    # Find the type and transform it for the type options field name
    # E.g: int-array => IntArray
    _type = params['IndexField']['IndexFieldType']
    _type = ''.join([i.capitalize() for i in _type.split('-')])

    # ``index_field`` of type ``latlon`` is mapped to ``Latlon``.
    # However, it is defined as ``LatLon`` in the model so it needs to
    # be changed.
    if _type == 'Latlon':
        _type = 'LatLon'

    # Transform string value to the correct type?
    if key.split(SEP)[-1] == 'DefaultValue':
        value = DEFAULT_VALUE_TYPE_MAP.get(_type, lambda x: x)(value)

    # Set the proper options field
    if _type + 'Options' not in params['IndexField']:
        params['IndexField'][_type + 'Options'] = {}

    params['IndexField'][_type + 'Options'][key.split(SEP)[-1]] = value
dataset/ETHPy150Open aws/aws-cli/awscli/customizations/cloudsearch.py/index_hydrate/original