Call Target Function From Script

Expand to copy examples/5_commandline/1_call_target_function_script.py (top right)

from ConfigSpace import ConfigurationSpace

from smac import BlackBoxFacade, Scenario

__copyright__ = "Copyright 2025, Leibniz University Hanover, Institute of AI"
__license__ = "3-clause BSD"


if __name__ == "__main__":
    cs = ConfigurationSpace({"x0": (0, 1000)}, seed=0)

    # Scenario object specifying the optimization "environment"
    scenario = Scenario(cs, deterministic=True, n_trials=30)

    # Now we use SMAC to find the best hyperparameters
    smac = BlackBoxFacade(
        scenario,
        "./script.sh",  # We pass the filename of our script here
        overwrite=True,  # Overrides any previous results that are found that are inconsistent with the meta-data
    )
    incumbent = smac.optimize()

    # Get cost of default configuration
    default_cost = smac.validate(cs.get_default_configuration())
    print(f"Default cost: {default_cost}")

    # Let's calculate the cost of the incumbent
    incumbent_cost = smac.validate(incumbent)
    print(f"Incumbent cost: {incumbent_cost}")

Description

This simple example shows how to call a script with the following content:

#!/bin/bash

# Set arguments first
for argument in "$@"
do
    key=$(echo $argument | cut -f1 -d=)
    value=$(echo $argument | cut -f2 -d=)  

    if [[ $key == *"--"* ]]; then
        v="${key/--/}"
        declare $v="${value}"
    fi
done

# We simply set the cost to our parameter
cost=$x0

# Return everything
echo "cost=$cost"

CodeRun

from ConfigSpace import ConfigurationSpace

from smac import BlackBoxFacade, Scenario

__copyright__ = "Copyright 2025, Leibniz University Hanover, Institute of AI"
__license__ = "3-clause BSD"


if __name__ == "__main__":
    cs = ConfigurationSpace({"x0": (0, 1000)}, seed=0)

    # Scenario object specifying the optimization "environment"
    scenario = Scenario(cs, deterministic=True, n_trials=30)

    # Now we use SMAC to find the best hyperparameters
    smac = BlackBoxFacade(
        scenario,
        "./script.sh",  # We pass the filename of our script here
        overwrite=True,  # Overrides any previous results that are found that are inconsistent with the meta-data
    )
    incumbent = smac.optimize()

    # Get cost of default configuration
    default_cost = smac.validate(cs.get_default_configuration())
    print(f"Default cost: {default_cost}")

    # Let's calculate the cost of the incumbent
    incumbent_cost = smac.validate(incumbent)
    print(f"Incumbent cost: {incumbent_cost}")