watertap.tools.parameter_sweep package
Submodules
watertap.tools.parameter_sweep.model_manager module
watertap.tools.parameter_sweep.parameter_sweep module
watertap.tools.parameter_sweep.parameter_sweep_differential module
watertap.tools.parameter_sweep.parameter_sweep_functions module
- watertap.tools.parameter_sweep.parameter_sweep_functions.differential_parameter_sweep(build_model, build_sweep_params, build_differential_sweep_specs, build_outputs=None, csv_results_file_name=None, h5_results_file_name=None, h5_parent_group_name=None, optimize_function=None, optimize_kwargs=None, initialize_function=None, initialize_kwargs=None, initialize_before_sweep=False, probe_function=None, debugging_data_dir=None, interpolate_nan_outputs=False, num_samples=None, num_diff_samples=1, seed=None, guarantee_solves=False)[source]
This function is similar to the parameter_sweep function for exploring the parameter space while guranteeing a required number of solves. If provided, writes single CSV file to
results_file
with all inputs and resulting outputs.- Parameters:
model – A Pyomo ConcreteModel containing a watertap flowsheet, for best results it should be initialized before being passed to this function.
sweep_params – A dictionary containing the values to vary with the format
sweep_params['Short/Pretty-print Name'] = (model.fs.variable_or_param[index], lower_limit, upper_limit, num_samples)
. A uniform number of samplesnum_samples
will be take between thelower_limit
andupper_limit
.differential_sweep_specs – A specification dictionary that contains details for how to construct the parameter sweep dictionary for differential sweep. This is a nested dictionary where the first level denotes the variable names for which the differential sweep needs to be carried out. The second level denotes various options to be used for wach variable. The number of samples for each differential sweep is specified while initializing the DifferentialParameterSweep object wsing the keyword num_diff_samples e.g.
highlight:: (..) – {“fs.a”: {“diff_mode”: “sum”, “diff_sample_type”: NormalSample, “std_dev”: 0.01, “pyomo_object”: m.fs.input[“a”]}, “fs.b”: {“diff_mode”: “product”, “diff_sample_type”: UniformSample, “relative_lb”: 0.01, “relative_ub”: 0.01, “pyomo_object”: m.fs.input[“b”]}, “fs.c”: {“diff_mode”: “sum”, “diff_sample_type”: GeomSample, “relative_lb”: 0.01, “relative_ub”: 10.0, “pyomo_object”: m.fs.input[“c”]}}
outputs (optional) – An optional dictionary containing “short names” as keys and and Pyomo objects on
model
whose values to report as values. E.g.,outputs['Short/Pretty-print Name'] = model.fs.variable_or_expression_to_report
. If not provided, i.e., outputs = None, the default behavior is to save all model variables, parameters, and expressions which provides very thorough results at the cost of large file sizes.csv_results_file_name (optional) – The path and file name to write a csv file. The default None does not write a csv file.
h5_results_file_name (optional) – The path and file name to write a h5 file. The default None does not write a file. Writing an h5 file will also create a companion text file {h5_results_file_name}.txt which contains the variable names contained within the H5 file.
h5_parent_group_name (optional) – Parent h5 groups for the parameter sweep inputs and outputs to be embedded in. The default is None and it accepts a string for the h5 group.
optimize_function (optional) – A user-defined function to perform the optimization of flowsheet
model
and loads the results back intomodel
. The first argument of this function ismodel
. The default uses the default IDAES solver, raising an exception if the termination condition is not optimal.optimize_kwargs (optional) – Dictionary of kwargs to pass into every call to
optimize_function
. The first arg will always bemodel
, e.g.,optimize_function(model, **optimize_kwargs)
. The default uses no kwargs.reinitialize_function (optional) – A user-defined function to perform the re-initialize the flowsheet
model
if the first call tooptimize_function
fails for any reason. Afterreinitialize_function
, the parameter sweep tool will immediately calloptimize_function
again.reinitialize_kwargs (optional) – Dictionary or kwargs to pass into every call to
reinitialize_function
. The first arg will always bemodel
, e.g.,reinitialize_function(model, **reinitialize_kwargs)
. The default uses no kwargs.reinitialize_before_sweep (optional) – Boolean option to reinitialize the flow sheet model before every parameter sweep realization. The default is False. Note the parameter sweep model will try to reinitialize the solve regardless of the option if the run fails.
probe_function (optional) – A user-defined function that can cheaply check if a current model configuration is solvable without actually reinitializing or solving.
debugging_data_dir (optional) – Save results on a per-process basis for parallel debugging purposes. If None no debugging data will be saved.
interpolate_nan_outputs (optional) – When the parameter sweep has finished, interior values of np.nan will be replaced with a value obtained via a linear interpolation of their surrounding valid neighbors. If true, a second output file with the extension “_clean” will be saved alongside the raw (un-interpolated) values.
num_samples (optional) – If the user is using sampling techniques rather than a grid of values, they need to set the required number of samples. This is the number of base solves that the user desires. The differential sweep will be performed on these base solves.
num_diff_samples (optional) – Number of samples for the differential sweep at a given base value.
seed (optional) – If the user is using a random sampling technique, this sets the seed
- Returns:
- A list were the first N columns are the values of the parameters passed
by
sweep_params
and the remaining columns are the values of the simulation identified by theoutputs
argument.
- Return type:
save_data
- watertap.tools.parameter_sweep.parameter_sweep_functions.parameter_sweep(build_model, build_sweep_params, build_outputs=None, csv_results_file_name=None, h5_results_file_name=None, h5_parent_group_name=None, optimize_function=None, optimize_kwargs=None, reinitialize_function=None, reinitialize_kwargs=None, reinitialize_before_sweep=False, probe_function=None, debugging_data_dir=None, interpolate_nan_outputs=False, num_samples=None, seed=None, number_of_subprocesses=None, build_model_kwargs=None, build_sweep_params_kwargs=None, build_outputs_kwargs=None)[source]
This function offers a general way to perform repeated optimizations of a model for the purposes of exploring a parameter space while monitoring multiple outputs. If provided, writes single CSV file to
results_file
with all inputs and resulting outputs.- Parameters:
build_model – A function that can be called to build a Pyomo ConcreteModel, OR (deprecated) a Pyomo ConcreteModel containing a watertap flowsheet.
build_sweep_params – A function that can be called to build a dictionary containing the values to vary with the format
sweep_params['Short/Pretty-print Name'] = (model.fs.variable_or_param[index], lower_limit, upper_limit, num_samples)
. A uniform number of samplesnum_samples
will be take between thelower_limit
andupper_limit
. OR (deprecated) the dictionary itself rather than a function for creating it.outputs (optional) – An optional function to produce a dictionary containing “short names” as keys and and Pyomo objects on
model
whose values to report as values. E.g.,outputs['Short/Pretty-print Name'] = model.fs.variable_or_expression_to_report
. OR (deprecated) the dictionary itself rather than a function for creating it. If neither is provided, i.e., outputs = None, the default behavior is to save all model variables, parameters, and expressions which provides very thorough results at the cost of large file sizes.csv_results_file_name (optional) – The path and file name to write a csv file. The default None does not write a csv file.
h5_results_file_name (optional) – The path and file name to write a h5 file. The default None does not write a file. Writing an h5 file will also create a companion text file {h5_results_file_name}.txt which contains the variable names contained within the H5 file.
h5_parent_group_name (optional) – Parent h5 groups for the parameter sweep inputs and outputs to be embedded in. The default is None and it accepts a string for the h5 group.
optimize_function (optional) – A user-defined function to perform the optimization of flowsheet
model
and loads the results back intomodel
. The first argument of this function ismodel
. The default uses the default IDAES solver, raising an exception if the termination condition is not optimal.optimize_kwargs (optional) – Dictionary of kwargs to pass into every call to
optimize_function
. The first arg will always bemodel
, e.g.,optimize_function(model, **optimize_kwargs)
. The default uses no kwargs.reinitialize_function (optional) – A user-defined function to perform the re-initialize the flowsheet
model
if the first call tooptimize_function
fails for any reason. Afterreinitialize_function
, the parameter sweep tool will immediately calloptimize_function
again.reinitialize_kwargs (optional) – Dictionary or kwargs to pass into every call to
reinitialize_function
. The first arg will always bemodel
, e.g.,reinitialize_function(model, **reinitialize_kwargs)
. The default uses no kwargs.reinitialize_before_sweep (optional) – Boolean option to reinitialize the flow sheet model before every parameter sweep realization. The default is False. Note the parameter sweep model will try to reinitialize the solve regardless of the option if the run fails.
probe_function (optional) – A user-defined function that can cheaply check if a current model configuration is solvable without actually reinitializing or solving.
debugging_data_dir (optional) – Save results on a per-process basis for parallel debugging purposes. If None no debugging data will be saved.
interpolate_nan_outputs (optional) – When the parameter sweep has finished, interior values of np.nan will be replaced with a value obtained via a linear interpolation of their surrounding valid neighbors. If true, a second output file with the extension “_clean” will be saved alongside the raw (un-interpolated) values.
num_samples (optional) – If the user is using sampling techniques rather than a linear grid of values, they need to set the number of samples
seed (optional) – If the user is using a random sampling technique, this sets the seed
number_of_subprocesses (optional) – Directive for fanning out subprocesses to perform parallel computation.
build_model_kwargs (optional) – A dictionary of kwargs to pass into the build_model function.
build_sweep_params_kwargs (optional) – A dictionary of kwargs to pass into the build_sweep_params function.
- Returns:
- A list were the first N columns are the values of the parameters passed
by
sweep_params
and the remaining columns are the values of the simulation identified by theoutputs
argument.
- Return type:
save_data
- watertap.tools.parameter_sweep.parameter_sweep_functions.recursive_parameter_sweep(build_model, build_sweep_params, build_outputs=None, csv_results_file_name=None, h5_results_file_name=None, h5_parent_group_name=None, optimize_function=None, optimize_kwargs=None, reinitialize_function=None, reinitialize_kwargs=None, reinitialize_before_sweep=False, probe_function=None, debugging_data_dir=None, interpolate_nan_outputs=False, num_samples=None, seed=None, number_of_subprocesses=None)[source]
This function is similar to the parameter_sweep function for exploring the parameter space while guranteeing a required number of solves. If provided, writes single CSV file to
results_file
with all inputs and resulting outputs.- Parameters:
model – A Pyomo ConcreteModel containing a watertap flowsheet, for best results it should be initialized before being passed to this function.
sweep_params – A dictionary containing the values to vary with the format
sweep_params['Short/Pretty-print Name'] = (model.fs.variable_or_param[index], lower_limit, upper_limit, num_samples)
. A uniform number of samplesnum_samples
will be take between thelower_limit
andupper_limit
.outputs – An optional dictionary containing “short names” as keys and and Pyomo objects on
model
whose values to report as values. E.g.,outputs['Short/Pretty-print Name'] = model.fs.variable_or_expression_to_report
. If not provided, i.e., outputs = None, the default behavior is to save all model variables, parameters, and expressions which provides very thorough results at the cost of large file sizes.csv_results_file_name (optional) – The path and file name to write a csv file. The default None does not write a csv file.
h5_results_file_name (optional) – The path and file name to write a h5 file. The default None does not write a file. Writing an h5 file will also create a companion text file {h5_results_file_name}.txt which contains the variable names contained within the H5 file.
h5_parent_group_name (optional) – Parent h5 groups for the parameter sweep inputs and outputs to be embedded in. The default is None and it accepts a string for the h5 group.
optimize_function (optional) – A user-defined function to perform the optimization of flowsheet
model
and loads the results back intomodel
. The first argument of this function ismodel
. The default uses the default IDAES solver, raising an exception if the termination condition is not optimal.optimize_kwargs (optional) – Dictionary of kwargs to pass into every call to
optimize_function
. The first arg will always bemodel
, e.g.,optimize_function(model, **optimize_kwargs)
. The default uses no kwargs.reinitialize_function (optional) – A user-defined function to perform the re-initialize the flowsheet
model
if the first call tooptimize_function
fails for any reason. Afterreinitialize_function
, the parameter sweep tool will immediately calloptimize_function
again.reinitialize_kwargs (optional) – Dictionary or kwargs to pass into every call to
reinitialize_function
. The first arg will always bemodel
, e.g.,reinitialize_function(model, **reinitialize_kwargs)
. The default uses no kwargs.reinitialize_before_sweep (optional) – Boolean option to reinitialize the flow sheet model before every parameter sweep realization. The default is False. Note the parameter sweep model will try to reinitialize the solve regardless of the option if the run fails.
probe_function (optional) – A user-defined function that can cheaply check if a current model configuration is solvable without actually reinitializing or solving.
debugging_data_dir (optional) – Save results on a per-process basis for parallel debugging purposes. If None no debugging data will be saved.
interpolate_nan_outputs (optional) – When the parameter sweep has finished, interior values of np.nan will be replaced with a value obtained via a linear interpolation of their surrounding valid neighbors. If true, a second output file with the extension “_clean” will be saved alongside the raw (un-interpolated) values.
num_samples (optional) – If the user is using sampling techniques rather than a linear grid of values, they need to set the required number of samples. This is the guaranteed number of solves that the user requires.
seed (optional) – If the user is using a random sampling technique, this sets the seed
- Returns:
- A list were the first N columns are the values of the parameters passed
by
sweep_params
and the remaining columns are the values of the simulation identified by theoutputs
argument.
- Return type:
save_data
watertap.tools.parameter_sweep.parameter_sweep_reader module
- watertap.tools.parameter_sweep.parameter_sweep_reader.get_sweep_params_from_yaml(m, yaml_filename)[source]
Creates a dictionary of swept model parameters specified via yaml file
This function creates a dictionary of the items to vary during a parameter sweep where the variable name, model attribute, and sweeping domain are specified in a YAML file. The YAML file should have the following format:
A_comp: type: NormalSample param: fs.RO.A_comp mean: 4.0e-12 std: 0.5e-12
where the top-level keyword can be any short, easily understood identifier for the parameter.
type
must be one ofLinearSample
,UniformSample
,NormalSample
, orLatinHypercubeSample
.param
must be a valid dot-sperated string path to the object attribute (in this case, an RO attribute on the flowsheetm
) that you wish to vary. The remaining arguments are dependent on the sample type selected. ForNormalSample
information about the mean and standard deviation is required. Consult theparameter_sweep
help for more information on the different sample classes.- Parameters:
m (pyomo model) – The flowsheet containing the model to deploy with the parameter sweep tool.
yaml_filename (str) – The path to the yaml file.
- Returns:
A dictionary containing different instances of parameter sweep samples
- Return type:
sweep_params (dict)
- watertap.tools.parameter_sweep.parameter_sweep_reader.set_defaults_from_yaml(m, yaml_filename, verbose=False)[source]
Sets default model values using values stored in a yaml file
This function reads a yaml file with the structure:
fs.path.to.attribute_1: 0.123 fs.path.to.attribute_2: 1.234 ...
and uses the (key, default_value) pairs to set default values for the attributes in model
m
.- Parameters:
m (pyomo model) – The flowsheet containing the model to set default values for
yaml_filename (str) – The path to the yaml file.
- Returns:
N/A
watertap.tools.parameter_sweep.parameter_sweep_writer module
watertap.tools.parameter_sweep.paramter_sweep_parallel_utils module
- watertap.tools.parameter_sweep.paramter_sweep_parallel_utils.do_build(param_sweep_instance)[source]
Used to pass into the parallel manager to build the parameters necessary for the sweep function. Defined at the top level so it’s picklable.
watertap.tools.parameter_sweep.sampling_types module
- class watertap.tools.parameter_sweep.sampling_types.FixedSample(pyomo_object, *args, **kwargs)[source]
Bases:
_Sample
- class watertap.tools.parameter_sweep.sampling_types.GeomSample(pyomo_object, *args, **kwargs)[source]
Bases:
FixedSample
- class watertap.tools.parameter_sweep.sampling_types.LatinHypercubeSample(pyomo_object, *args, **kwargs)[source]
Bases:
_Sample
- class watertap.tools.parameter_sweep.sampling_types.LinearSample(pyomo_object, *args, **kwargs)[source]
Bases:
FixedSample
- class watertap.tools.parameter_sweep.sampling_types.NormalSample(pyomo_object, *args, **kwargs)[source]
Bases:
RandomSample
- class watertap.tools.parameter_sweep.sampling_types.PredeterminedFixedSample(pyomo_object, *args, **kwargs)[source]
Bases:
FixedSample
Similar to other fixed sampling types except the setup function arguments. In this case a user needs to specify a numpy array (or a list) of predetermined values. For example:
sample_obj = PredeterminedFixedSample(np.array([1,2,3,4]))
- class watertap.tools.parameter_sweep.sampling_types.PredeterminedRandomSample(pyomo_object, *args, **kwargs)[source]
Bases:
RandomSample
Similar to other fixed sampling types except the setup function arguments. In this case a user needs to specify a numpy array (or a list) of predetermined values. For example:
sample_obj = PredeterminedRandomSample(np.array([1,2,3,4]))
- class watertap.tools.parameter_sweep.sampling_types.RandomSample(pyomo_object, *args, **kwargs)[source]
Bases:
_Sample
- class watertap.tools.parameter_sweep.sampling_types.ReverseGeomSample(pyomo_object, *args, **kwargs)[source]
Bases:
FixedSample
- class watertap.tools.parameter_sweep.sampling_types.SamplingType(value)[source]
Bases:
Enum
An enumeration.
- class watertap.tools.parameter_sweep.sampling_types.SetMode(value)[source]
Bases:
Enum
An enumeration.
- class watertap.tools.parameter_sweep.sampling_types.UniformSample(pyomo_object, *args, **kwargs)[source]
Bases:
RandomSample