def load_metaparameters(param_dict=None):
    """
    Parameters for bayesian optimizer. Default dictionary listed and updated by param_dict.
    """
    metaparams = {'architecture': 'svm',
                  'log_gamma': -3,
                  'log_C': -2}
    if param_dict:
        metaparams.update(param_dict)

    return metaparams