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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def main(model_folder):
 """Main part of the training script."""

    model_description_file = os.path.join(model_folder, "info.yml")

    # Read the model description file
    with open(model_description_file, 'r') as ymlfile:
        model_description = yaml.load(ymlfile)

    # Analyze model
    logging.info(model_description['model'])
    data = {}
    data['training'] = os.path.join(model_folder, "traindata.hdf5")
    data['testing'] = os.path.join(model_folder, "testdata.hdf5")
    data['validating'] = os.path.join(model_folder, "validdata.hdf5")
    train_model(model_folder)