import json


def load_base_models_json(filename="base_models.json"):
    """Load base models json to allow selecting pre-trained model.

    Args:
        filename (str) - filename for the json file with pre-trained models

    Returns:
        base_models - python dict version of JSON key-value pairs
    """
    with open(filename) as json_file:
        base_models = json.load(json_file)

    return base_models