argparse metavar使用

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parser.add_argument('-s', '--stacks', default=8, type=int, metavar='N',
help='Number of hourglasses to stack')
parser.add_argument('--features', default=256, type=int, metavar='N',
help='Number of features in the hourglass')
parser.add_argument('-b', '--blocks', default=1, type=int, metavar='N',
help='Number of residual modules at each location in the hourglass')
parser.add_argument('--num-classes', default=16, type=int, metavar='N',
help='Number of keypoints')
------
optional arguments:
-h, --help show this help message and exit
--arch ARCH, -a ARCH model architecture: hg | preresnet110 | preresnet1202
| preresnet20 | preresnet32 | preresnet44 |
preresnet56 (default: resnet18)
-s N, --stacks N Number of hourglasses to stack
--features N Number of features in the hourglass
-b N, --blocks N Number of residual modules at each location in the
hourglass
--num-classes N Number of keypoints
-j N, --workers N number of data loading workers (default: 4)
--epochs N number of total epochs to run
--start-epoch N manual epoch number (useful on restarts)
--train-batch N train batchsize
--test-batch N test batchsize
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