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Horizon Smart Car Developer Community
Horizon Official Website
Guide
Horizon Smart Car Developer Community
Horizon Official Website
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Overriding Config Parameters Using Commands

HAT supports modifying the config parameters from the command line by adding (key, value) after --opts.

python tools/train.py --stage float --config configs/classification/resnet18.py --opts "key1" "value1" "key2" "value2"

Where the key is the name of the parameter to be modified and the value is the value to be passed in, as in the config.py file:

task_name = "resnet_cls" num_classes=1000 devices = [0, 1, 2, 3] data_shape = (3, 224, 224) model = dict( backbone="resnet18", num_classes=num_classes, )
Note

Examples in this document focus on the formats of different parameters when using --opts. In your projects, the parameters and field configurations may differ from the example.

  • key supports multi-level parameter modification:

    python tools/train.py --stage float --config config.py --opts model.backbone "'resnet50'"

    The above command changes the value of the model.backbone field in config to "resnet50".

  • value can be number, str, list, or tuple, but dict is not supported.

    For example, the following command can change the value of the model.num_classes field in config to 10.

    python tools/train.py --stage float --config config.py --opts num_classes 10

    However, because of the parsing mechanism, you need to quote the value to be passed if its type is tuple or list, for example:

    python tools/train.py --stage float --config config.py --opts data_shape (3, 112, 112) # Cause incorrect parsing python tools/train.py --stage float --config config.py --opts data_shape "(3, 112, 112)" # Correct format

    If the value type is str, you need to add extra quotes, for example:

    python tools/train.py --stage float --config config.py --opts model.backbone resnet18 # Cause incorrect parsing python tools/train.py --stage float --config config.py --opts model.backbone "resnet18" # Cause incorrect parsing python tools/train.py --stage float --config config.py --opts model.backbone "'resnet18'" # Correct format