def train_args():
    "\n        Retrieves and parses the 3 command line arguments provided by the user when\n        they run the program from a terminal window. This function uses Python's\n        argparse module to created and defined these 3 command line arguments. If\n        the user fails to provide some or all of the 3 arguments, then the default\n        values are used for the missing arguments.\n\n        :return: results: data structure that stores the command line arguments object\n     "
    parser = argparse.ArgumentParser()
    parser.add_argument('--data_dir', action='store', dest='data_dir', default='flowers', help='Path the directory of the dataset, should contain sub-directories /train, /test, /valid')
    parser.add_argument('--save_dir', action='store', dest='save_dir', default='checkpoint.pth', help='Set directory to save checkpoints')
    parser.add_argument('--arch', action='store', dest='arch', default='vgg16', help='Choose architecture. Default: vgg16')
    parser.add_argument('--learning_rate', action='store', dest='learning_rate', default=0.003, help='Set the learning rate', type=float)
    parser.add_argument('--hidden_units', action='store', dest='hidden_units', default=256, help='Add the hidden units', type=int)
    parser.add_argument('--epochs', action='store', dest='epochs', default=30, help='Add number of epoch cycles', type=int)
    parser.add_argument('--gpu', action='store_true', dest='gpu', help='Activate GPU')
    results = parser.parse_args()
    return results
Retrieves and parses the 3 command line arguments provided by the user when
they run the program from a terminal window. This function uses Python's
argparse module to created and defined these 3 command line arguments. If
the user fails to provide some or all of the 3 arguments, then the default
values are used for the missing arguments.

:return: results: data structure that stores the command line arguments object
def train_args():
    "\n        Retrieves and parses the 3 command line arguments provided by the user when\n        they run the program from a terminal window. This function uses Python's\n        argparse module to created and defined these 3 command line arguments. If\n        the user fails to provide some or all of the 3 arguments, then the default\n        values are used for the missing arguments.\n\n        :return: results: data structure that stores the command line arguments object\n     "
    parser = argparse.ArgumentParser()
    parser.add_argument('--data_dir', action='store', dest='data_dir', default='flowers', help='Path the directory of the dataset, should contain sub-directories /train, /test, /valid')
    parser.add_argument('--save_dir', action='store', dest='save_dir', default='checkpoint.pth', help='Set directory to save checkpoints')
    parser.add_argument('--arch', action='store', dest='arch', default='vgg16', help='Choose architecture. Default: vgg16')
    parser.add_argument('--learning_rate', action='store', dest='learning_rate', default=0.003, help='Set the learning rate', type=float)
    parser.add_argument('--hidden_units', action='store', dest='hidden_units', default=256, help='Add the hidden units', type=int)
    parser.add_argument('--epochs', action='store', dest='epochs', default=30, help='Add number of epoch cycles', type=int)
    parser.add_argument('--gpu', action='store_true', dest='gpu', help='Activate GPU')
    results = parser.parse_args()
    return results