`import nevergrad as ng
from nevergrad.functions.powersystems.core import PowerSystem

budget = 3500
width = 6
depth = 6
num_dams = 6
year_to_day_ratio = 0.5
back_to_normal = 0.5
num_thermal_plants = 6
constant_to_year_ratio = 4.0

power_system_loss = PowerSystem(
num_dams=num_dams,
depth=depth,
width=width,
year_to_day_ratio=year_to_day_ratio,
back_to_normal=back_to_normal,
num_thermal_plants=num_thermal_plants,
constant_to_year_ratio=constant_to_year_ratio,
)

added line:

param = int(power_system_loss.dimension/power_system_loss.num_dams)

changed 'parametrization=power_system_loss.dimension' in the optimizer parameters:

optimizer = ng.optimizers.SplitOptimizer(
parametrization=param, budget=budget, num_workers=1
)

optimizer.minimize(power_system_loss)
power_system_loss(optimizer.provide_recommendation().value)
power_system_loss.make_plots(
f"ps_{num_dams}dams_{depth}_{width}_ytdr{year_to_day_ratio}_btn{back_to_normal}"
f"_num_thermal_plants{num_thermal_plants}_ctyr{constant_to_year_ratio}_budget{budget}.png"
)`

from nevergrad.