4-Deployment/RealTime/config/xgboost_customer_churn.py [116:138]:
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def model_fn(model_dir):
    """Load a model. For XGBoost Framework, a default function to load a model is not provided.
    Users should provide customized model_fn() in script.
    Args:
        model_dir: a directory where model is saved.
    Returns:
        A XGBoost model.
        XGBoost model format type.
    """
    model_files = (file for file in os.listdir(model_dir) if os.path.isfile(os.path.join(model_dir, file)))
    model_file = next(model_files)
    try:
        booster = pickle.load(open(os.path.join(model_dir, model_file), 'rb'))
        format = 'pkl_format'
    except Exception as exp_pkl:
        try:
            booster = xgboost.Booster()
            booster.load_model(os.path.join(model_dir, model_file))
            format = 'xgb_format'
        except Exception as exp_xgb:
            raise ModelLoadInferenceError("Unable to load model: {} {}".format(str(exp_pkl), str(exp_xgb)))
    booster.set_param('nthread', 1)
    return booster
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5-Monitoring/config/inference.py [8:30]:
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def model_fn(model_dir):
    """Load a model. For XGBoost Framework, a default function to load a model is not provided.
    Users should provide customized model_fn() in script.
    Args:
        model_dir: a directory where model is saved.
    Returns:
        A XGBoost model.
        XGBoost model format type.
    """
    model_files = (file for file in os.listdir(model_dir) if os.path.isfile(os.path.join(model_dir, file)))
    model_file = next(model_files)
    try:
        booster = pickle.load(open(os.path.join(model_dir, model_file), 'rb'))
        format = 'pkl_format'
    except Exception as exp_pkl:
        try:
            booster = xgboost.Booster()
            booster.load_model(os.path.join(model_dir, model_file))
            format = 'xgb_format'
        except Exception as exp_xgb:
            raise ModelLoadInferenceError("Unable to load model: {} {}".format(str(exp_pkl), str(exp_xgb)))
    booster.set_param('nthread', 1)
    return booster
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