gemseo / wrappers

# disc_from_exe module¶

Make a discipline from an executable.

class gemseo.wrappers.disc_from_exe.DiscFromExe(input_template, output_template, output_folder_basepath, executable_command, input_filename, output_filename, folders_iter=FoldersIter.NUMBERED, name=None, parse_outfile_method=Parsers.TEMPLATE_PARSER, write_input_file_method=None, parse_out_separator='=', use_shell=True)[source]

Generic wrapper for executables.

The DiscFromExe is a generic wrapper for executables. It generates a MDODiscipline from an executable and in inputs/output files wrappers. The input and output files are described by templates. The templates can be generated by executing the module template_grammar_editor to open a GUI.

It requires the creation of templates for input and output file, for instance, from the following input JSON file:

{
"a": 1.01515112125,
"b": 2.00151511213,
"c": 3.00151511213
}


A template that declares the inputs must be generated under this format, where “a” is the name of the input, and “1.0” is the default input. GEMSEO_INPUT declares an input, GEMSEO_OUTPUT declares an output, similarly.

{
"a": GEMSEO_INPUT{a::1.0},
"b": GEMSEO_INPUT{b::2.0},
"c": GEMSEO_INPUT{c::3.0}
}


The current limitations are

• Only one input and one output file, otherwise, inherit from this class and modify the parsers. Only limited input writing and output parser strategies are implemented. To change that, you can pass custom parsing and writing methods to the constructor.

• The only limitation in the current file format is that it must be a plain text file and not a binary file. In this case, the way of interfacing it is to provide a specific parser to the DiscFromExe, with the write_input_file_method and parse_outfile_method arguments of the constructor.

Parameters
• input_template (str) – The path to the input file template. The input locations in the file are marked by GEMSEO_INPUT{input_name::1.0}, where “input_name” is the input name, and 1.0 is here the default input.

• output_template (str) – The path to the output file template. The input locations in the file are marked by GEMSEO_OUTPUT{output_name::1.0}, where “output_name” is the input name.

• output_folder_basepath (str) – The description is missing.

• executable_command (str) – The command to run the executable. Will be called through a system call. Example: “python myscript.py -i input.txt -o output.txt

• input_filename (str) – The name of the input file. This will determine the name of the input file generated in the output folder. Example “input.txt”.

• output_filename (str) – The name of the output file. This will determine the name of the output file generated in the output folder. Example “output.txt”.

• (Union[str (folders_iter) – The type of unique identifiers for the output folders. If NUMBERED the generated output folders will be “output_folder_basepath”+str(i+1), where i is the maximum value of the already existing “output_folder_basepath”+str(i) folders. Otherwise, a unique number based on the UUID function is generated. This last option shall be used if multiple MDO processes are run in the same work directory.

• FoldersIter] – The type of unique identifiers for the output folders. If NUMBERED the generated output folders will be “output_folder_basepath”+str(i+1), where i is the maximum value of the already existing “output_folder_basepath”+str(i) folders. Otherwise, a unique number based on the UUID function is generated. This last option shall be used if multiple MDO processes are run in the same work directory.

• name (str | None) –

the name of the discipline. If None, use the class name.

By default it is set to None.

• parse_outfile_method (str | Parsers) –

The optional method that can be provided by the user to parse the output file. To see the signature of the method, see the parse_outfile method of this file. If the KEY_VALUE_PARSER is used as output parser, specify the separator key (default : “=”).

By default it is set to TEMPLATE_PARSER.

• write_input_file_method (str | None) –

The method to write the input file. If None, use these modules’ write_input_file. To see the signature of the method, see the write_input_file method of this file.

By default it is set to None.

• parse_out_separator (str) –

The separator used for the output parser.

By default it is set to =.

• use_shell (bool) –

If True, run the command using the default shell. Otherwise, run directly the command.

By default it is set to True.

• folders_iter (str | FoldersIter) –

By default it is set to NUMBERED.

Raises

TypeError – If the provided write_input_file_method is not callable.

Return type

None

classmethod activate_time_stamps()

Activate the time stamps.

For storing start and end times of execution and linearizations.

Return type

None

Add inputs against which to differentiate the outputs.

This method updates MDODiscipline._differentiated_inputs with inputs.

Parameters

inputs (Iterable[str] | None) –

The input variables against which to differentiate the outputs. If None, all the inputs of the discipline are used.

By default it is set to None.

Raises

ValueError – When the inputs wrt which differentiate the discipline are not inputs of the latter.

Return type

None

Add outputs to be differentiated.

This method updates MDODiscipline._differentiated_outputs with outputs.

Parameters

outputs (Iterable[str] | None) –

The output variables to be differentiated. If None, all the outputs of the discipline are used.

By default it is set to None.

Raises

ValueError – When the outputs to differentiate are not discipline outputs.

Return type

None

Add a namespace prefix to an existing input grammar element.

The updated input grammar element name will be namespace+:data:~gemseo.core.namespaces.namespace_separator+name.

Parameters
• name (str) – The element name to rename.

• namespace (str) – The name of the namespace.

Add a namespace prefix to an existing output grammar element.

The updated output grammar element name will be namespace+:data:~gemseo.core.namespaces.namespace_separator+name.

Parameters
• name (str) – The element name to rename.

• namespace (str) – The name of the namespace.

Add an observer for the status.

Add an observer for the status to be notified when self changes of status.

Parameters

obs (Any) – The observer to add.

Return type

None

auto_get_grammar_file(is_input=True, name=None, comp_dir=None)

Use a naming convention to associate a grammar file to the discipline.

Search in the directory comp_dir for either an input grammar file named name + "_input.json" or an output grammar file named name + "_output.json".

Parameters
• is_input (bool) –

Whether to search for an input or output grammar file.

By default it is set to True.

• name (str | None) –

The name to be searched in the file names. If None, use the name of the discipline class.

By default it is set to None.

• comp_dir (str | Path | None) –

The directory in which to search the grammar file. If None, use the GRAMMAR_DIRECTORY if any, or the directory of the discipline class module.

By default it is set to None.

Returns

The grammar file path.

Return type

str

check_input_data(input_data, raise_exception=True)

Check the input data validity.

Parameters
• input_data (dict[str, Any]) – The input data needed to execute the discipline according to the discipline input grammar.

• raise_exception (bool) –

Whether to raise on error.

By default it is set to True.

Return type

None

check_jacobian(input_data=None, derr_approx='finite_differences', step=1e-07, threshold=1e-08, linearization_mode='auto', inputs=None, outputs=None, parallel=False, n_processes=2, use_threading=False, wait_time_between_fork=0, auto_set_step=False, plot_result=False, file_path='jacobian_errors.pdf', show=False, fig_size_x=10, fig_size_y=10, reference_jacobian_path=None, save_reference_jacobian=False, indices=None)

Check if the analytical Jacobian is correct with respect to a reference one.

If reference_jacobian_path is not None and save_reference_jacobian is True, compute the reference Jacobian with the approximation method and save it in reference_jacobian_path.

If reference_jacobian_path is not None and save_reference_jacobian is False, do not compute the reference Jacobian but read it from reference_jacobian_path.

If reference_jacobian_path is None, compute the reference Jacobian without saving it.

Parameters
• input_data (dict[str, ndarray] | None) –

The input data needed to execute the discipline according to the discipline input grammar. If None, use the MDODiscipline.default_inputs.

By default it is set to None.

• derr_approx (str) –

The approximation method, either “complex_step” or “finite_differences”.

By default it is set to finite_differences.

• threshold (float) –

The acceptance threshold for the Jacobian error.

By default it is set to 1e-08.

• linearization_mode (str) –

the mode of linearization: direct, adjoint or automated switch depending on dimensions of inputs and outputs (Default value = ‘auto’)

By default it is set to auto.

• inputs (Iterable[str] | None) –

The names of the inputs wrt which to differentiate the outputs.

By default it is set to None.

• outputs (Iterable[str] | None) –

The names of the outputs to be differentiated.

By default it is set to None.

• step (float) –

The differentiation step.

By default it is set to 1e-07.

• parallel (bool) –

Whether to differentiate the discipline in parallel.

By default it is set to False.

• n_processes (int) –

The maximum simultaneous number of threads, if use_threading is True, or processes otherwise, used to parallelize the execution.

By default it is set to 2.

• use_threading (bool) –

Whether to use threads instead of processes to parallelize the execution; multiprocessing will copy (serialize) all the disciplines, while threading will share all the memory This is important to note if you want to execute the same discipline multiple times, you shall use multiprocessing.

By default it is set to False.

• wait_time_between_fork (float) –

The time waited between two forks of the process / thread.

By default it is set to 0.

• auto_set_step (bool) –

Whether to compute the optimal step for a forward first order finite differences gradient approximation.

By default it is set to False.

• plot_result (bool) –

Whether to plot the result of the validation (computed vs approximated Jacobians).

By default it is set to False.

• file_path (str | Path) –

The path to the output file if plot_result is True.

By default it is set to jacobian_errors.pdf.

• show (bool) –

Whether to open the figure.

By default it is set to False.

• fig_size_x (float) –

The x-size of the figure in inches.

By default it is set to 10.

• fig_size_y (float) –

The y-size of the figure in inches.

By default it is set to 10.

• reference_jacobian_path (str | Path | None) –

The path of the reference Jacobian file.

By default it is set to None.

• save_reference_jacobian (bool) –

Whether to save the reference Jacobian.

By default it is set to False.

• indices (Iterable[int] | None) –

The indices of the inputs and outputs for the different sub-Jacobian matrices, formatted as {variable_name: variable_components} where variable_components can be either an integer, e.g. 2 a sequence of integers, e.g. [0, 3], a slice, e.g. slice(0,3), the ellipsis symbol () or None, which is the same as ellipsis. If a variable name is missing, consider all its components. If None, consider all the components of all the inputs and outputs.

By default it is set to None.

Returns

Whether the analytical Jacobian is correct with respect to the reference one.

check_output_data(raise_exception=True)

Check the output data validity.

Parameters

raise_exception (bool) –

Whether to raise an exception when the data is invalid.

By default it is set to True.

Return type

None

classmethod deactivate_time_stamps()

Deactivate the time stamps.

For storing start and end times of execution and linearizations.

Return type

None

static deserialize(file_path)

Deserialize a discipline from a file.

Parameters

file_path (str | Path) – The path to the file containing the discipline.

Returns

The discipline instance.

Return type

MDODiscipline

execute(input_data=None)

Execute the discipline.

This method executes the discipline:

Parameters

input_data (Mapping[str, Any] | None) –

The input data needed to execute the discipline according to the discipline input grammar. If None, use the MDODiscipline.default_inputs.

By default it is set to None.

Returns

The discipline local data after execution.

Raises

RuntimeError – When residual_variables are declared but self.run_solves_residuals is False. This is not suported yet.

Return type

dict[str, Any]

generate_uid()[source]

Generate a unique identifier for the execution directory.

Generate a unique identifier for the current execution. If the folders_iter strategy is NUMBERED, the successive iterations are named by an integer 1, 2, 3 etc. This is multiprocess safe. Otherwise, a unique number based on the UUID function is generated. This last option shall be used if multiple MDO processes are runned in the same workdir.

Returns

An unique string identifier (either a number or a UUID).

Return type

str

get_all_inputs()

Return the local input data as a list.

The order is given by MDODiscipline.get_input_data_names().

Returns

The local input data.

Return type

list[Any]

get_all_outputs()

Return the local output data as a list.

The order is given by MDODiscipline.get_output_data_names().

Returns

The local output data.

Return type

list[Any]

get_attributes_to_serialize()

Define the names of the attributes to be serialized.

Shall be overloaded by disciplines

Returns

The names of the attributes to be serialized.

Return type

list[str]

static get_data_list_from_dict(keys, data_dict)

Filter the dict from a list of keys or a single key.

If keys is a string, then the method return the value associated to the key. If keys is a list of strings, then the method returns a generator of value corresponding to the keys which can be iterated.

Parameters
• keys (str | Iterable) – One or several names.

• data_dict (dict[str, Any]) – The mapping from which to get the data.

Returns

Either a data or a generator of data.

Return type

Any | Generator[Any]

get_disciplines_in_dataflow_chain()

Return the disciplines that must be shown as blocks within the XDSM representation of a chain.

By default, only the discipline itself is shown. This function can be differently implemented for any type of inherited discipline.

Returns

The disciplines shown in the XDSM chain.

Return type
get_expected_dataflow()

Return the expected data exchange sequence.

This method is used for the XDSM representation.

The default expected data exchange sequence is an empty list.

MDOFormulation.get_expected_dataflow

Returns

The data exchange arcs.

Return type
get_expected_workflow()

Return the expected execution sequence.

This method is used for the XDSM representation.

The default expected execution sequence is the execution of the discipline itself.

MDOFormulation.get_expected_workflow

Returns

The expected execution sequence.

Return type

SerialExecSequence

get_input_data(with_namespaces=True)

Return the local input data as a dictionary.

Parameters

with_namespaces

Whether to keep the namespace prefix of the input names, if any.

By default it is set to True.

Returns

The local input data.

Return type

dict[str, Any]

get_input_data_names(with_namespaces=True)

Return the names of the input variables.

Parameters

with_namespaces

Whether to keep the namespace prefix of the input names, if any.

By default it is set to True.

Returns

The names of the input variables.

Return type

list[str]

get_input_output_data_names(with_namespaces=True)

Return the names of the input and output variables.

Args:
with_namespaces: Whether to keep the namespace prefix of the

output names, if any.

Returns

The name of the input and output variables.

Return type

list[str]

get_inputs_asarray()

Return the local output data as a large NumPy array.

The order is the one of MDODiscipline.get_all_outputs().

Returns

The local output data.

Return type

numpy.ndarray

get_inputs_by_name(data_names)

Return the local data associated with input variables.

Parameters

data_names (Iterable[str]) – The names of the input variables.

Returns

The local data for the given input variables.

Raises

ValueError – When a variable is not an input of the discipline.

Return type

list[Any]

get_local_data_by_name(data_names)

Return the local data of the discipline associated with variables names.

Parameters

data_names (Iterable[str]) – The names of the variables.

Returns

The local data associated with the variables names.

Raises

ValueError – When a name is not a discipline input name.

Return type

Generator[Any]

get_output_data(with_namespaces=True)

Return the local output data as a dictionary.

Parameters

with_namespaces

Whether to keep the namespace prefix of the output names, if any.

By default it is set to True.

Returns

The local output data.

Return type

dict[str, Any]

get_output_data_names(with_namespaces=True)

Return the names of the output variables.

Parameters

with_namespaces

Whether to keep the namespace prefix of the output names, if any.

By default it is set to True.

Returns

The names of the output variables.

Return type

list[str]

get_outputs_asarray()

Return the local input data as a large NumPy array.

The order is the one of MDODiscipline.get_all_inputs().

Returns

The local input data.

Return type

numpy.ndarray

get_outputs_by_name(data_names)

Return the local data associated with output variables.

Parameters

data_names (Iterable[str]) – The names of the output variables.

Returns

The local data for the given output variables.

Raises

ValueError – When a variable is not an output of the discipline.

Return type

list[Any]

get_sub_disciplines()

Return the sub-disciplines if any.

Returns

The sub-disciplines.

Return type
is_all_inputs_existing(data_names)

Test if several variables are discipline inputs.

Parameters

data_names (Iterable[str]) – The names of the variables.

Returns

Whether all the variables are discipline inputs.

Return type

bool

is_all_outputs_existing(data_names)

Test if several variables are discipline outputs.

Parameters

data_names (Iterable[str]) – The names of the variables.

Returns

Whether all the variables are discipline outputs.

Return type

bool

is_input_existing(data_name)

Test if a variable is a discipline input.

Parameters

data_name (str) – The name of the variable.

Returns

Whether the variable is a discipline input.

Return type

bool

is_output_existing(data_name)

Test if a variable is a discipline output.

Parameters

data_name (str) – The name of the variable.

Returns

Whether the variable is a discipline output.

Return type

bool

static is_scenario()

Whether the discipline is a scenario.

Return type

bool

linearize(input_data=None, force_all=False, force_no_exec=False)

Execute the linearized version of the code.

Parameters
• input_data (dict[str, Any] | None) –

The input data needed to linearize the discipline according to the discipline input grammar. If None, use the MDODiscipline.default_inputs.

By default it is set to None.

• force_all (bool) –

If False, MDODiscipline._differentiated_inputs and MDODiscipline._differentiated_outputs are used to filter the differentiated variables. otherwise, all outputs are differentiated wrt all inputs.

By default it is set to False.

• force_no_exec (bool) –

If True, the discipline is not re-executed, cache is loaded anyway.

By default it is set to False.

Returns

The Jacobian of the discipline.

Return type

dict[str, dict[str, ndarray]]

notify_status_observers()

Notify all status observers that the status has changed.

Return type

None

remove_status_observer(obs)

Remove an observer for the status.

Parameters

obs (Any) – The observer to remove.

Return type

None

reset_statuses_for_run()

Set all the statuses to MDODiscipline.STATUS_PENDING.

Raises

ValueError – When the discipline cannot be run because of its status.

Return type

None

serialize(file_path)

Serialize the discipline and store it in a file.

Parameters

file_path (str | Path) – The path to the file to store the discipline.

Return type

None

set_cache_policy(cache_type='SimpleCache', cache_tolerance=0.0, cache_hdf_file=None, cache_hdf_node_name=None, is_memory_shared=True)

Set the type of cache to use and the tolerance level.

This method defines when the output data have to be cached according to the distance between the corresponding input data and the input data already cached for which output data are also cached.

The cache can be either a SimpleCache recording the last execution or a cache storing all executions, e.g. MemoryFullCache and HDF5Cache. Caching data can be either in-memory, e.g. SimpleCache and MemoryFullCache, or on the disk, e.g. HDF5Cache.

The attribute CacheFactory.caches provides the available caches types.

Parameters
• cache_type (str) –

The type of cache.

By default it is set to SimpleCache.

• cache_tolerance (float) –

The maximum relative norm of the difference between two input arrays to consider that two input arrays are equal.

By default it is set to 0.0.

• cache_hdf_file (str | Path | None) –

The path to the HDF file to store the data; this argument is mandatory when the MDODiscipline.HDF5_CACHE policy is used.

By default it is set to None.

• cache_hdf_node_name (str | None) –

The name of the HDF file node to store the discipline data. If None, MDODiscipline.name is used.

By default it is set to None.

• is_memory_shared (bool) –

Whether to store the data with a shared memory dictionary, which makes the cache compatible with multiprocessing.

By default it is set to True.

Return type

None

set_disciplines_statuses(status)

Set the sub-disciplines statuses.

To be implemented in subclasses.

Parameters

status (str) – The status.

Return type

None

set_jacobian_approximation(jac_approx_type='finite_differences', jax_approx_step=1e-07, jac_approx_n_processes=1, jac_approx_use_threading=False, jac_approx_wait_time=0)

Set the Jacobian approximation method.

Sets the linearization mode to approx_method, sets the parameters of the approximation for further use when calling MDODiscipline.linearize().

Parameters
• jac_approx_type (str) –

The approximation method, either “complex_step” or “finite_differences”.

By default it is set to finite_differences.

• jax_approx_step (float) –

The differentiation step.

By default it is set to 1e-07.

• jac_approx_n_processes (int) –

The maximum simultaneous number of threads, if jac_approx_use_threading is True, or processes otherwise, used to parallelize the execution.

By default it is set to 1.

• jac_approx_use_threading (bool) –

Whether to use threads instead of processes to parallelize the execution; multiprocessing will copy (serialize) all the disciplines, while threading will share all the memory This is important to note if you want to execute the same discipline multiple times, you shall use multiprocessing.

By default it is set to False.

• jac_approx_wait_time (float) –

The time waited between two forks of the process / thread.

By default it is set to 0.

Return type

None

set_optimal_fd_step(outputs=None, inputs=None, force_all=False, print_errors=False, numerical_error=2.220446049250313e-16)

Compute the optimal finite-difference step.

Compute the optimal step for a forward first order finite differences gradient approximation. Requires a first evaluation of the perturbed functions values. The optimal step is reached when the truncation error (cut in the Taylor development), and the numerical cancellation errors (round-off when doing f(x+step)-f(x)) are approximately equal.

Warning

This calls the discipline execution twice per input variables.

https://en.wikipedia.org/wiki/Numerical_differentiation and “Numerical Algorithms and Digital Representation”, Knut Morken , Chapter 11, “Numerical Differentiation”

Parameters
• inputs (Iterable[str] | None) –

The inputs wrt which the outputs are linearized. If None, use the MDODiscipline._differentiated_inputs.

By default it is set to None.

• outputs (Iterable[str] | None) –

The outputs to be linearized. If None, use the MDODiscipline._differentiated_outputs.

By default it is set to None.

• force_all (bool) –

Whether to consider all the inputs and outputs of the discipline;

By default it is set to False.

• print_errors (bool) –

Whether to display the estimated errors.

By default it is set to False.

• numerical_error (float) –

The numerical error associated to the calculation of f. By default, this is the machine epsilon (appx 1e-16), but can be higher when the calculation of f requires a numerical resolution.

By default it is set to 2.220446049250313e-16.

Returns

The estimated errors of truncation and cancellation error.

Raises

ValueError – When the Jacobian approximation method has not been set.

store_local_data(**kwargs)

Store discipline data in local data.

Parameters

**kwargs (Any) – The data to be stored in MDODiscipline.local_data.

Return type

None

APPROX_MODES = ['finite_differences', 'complex_step']
AVAILABLE_MODES = ('auto', 'direct', 'adjoint', 'reverse', 'finite_differences', 'complex_step')
AVAILABLE_STATUSES = ['DONE', 'FAILED', 'PENDING', 'RUNNING', 'VIRTUAL']
COMPLEX_STEP = 'complex_step'
FINITE_DIFFERENCES = 'finite_differences'
GRAMMAR_DIRECTORY: ClassVar[str | None] = None

The directory in which to search for the grammar files if not the class one.

HDF5_CACHE = 'HDF5Cache'
JSON_GRAMMAR_TYPE = 'JSONGrammar'
MEMORY_FULL_CACHE = 'MemoryFullCache'
N_CPUS = 2
RE_EXECUTE_DONE_POLICY = 'RE_EXEC_DONE'
RE_EXECUTE_NEVER_POLICY = 'RE_EXEC_NEVER'
SIMPLE_CACHE = 'SimpleCache'
SIMPLE_GRAMMAR_TYPE = 'SimpleGrammar'
STATUS_DONE = 'DONE'
STATUS_FAILED = 'FAILED'
STATUS_PENDING = 'PENDING'
STATUS_RUNNING = 'RUNNING'
STATUS_VIRTUAL = 'VIRTUAL'
activate_cache: bool = True

Whether to cache the discipline evaluations by default.

activate_counters: ClassVar[bool] = True

Whether to activate the counters (execution time, calls and linearizations).

activate_input_data_check: ClassVar[bool] = True

Whether to check the input data respect the input grammar.

activate_output_data_check: ClassVar[bool] = True

Whether to check the output data respect the output grammar.

cache: AbstractCache

The cache containing one or several executions of the discipline according to the cache policy.

property cache_tol: float

The cache input tolerance.

This is the tolerance for equality of the inputs in the cache. If norm(stored_input_data-input_data) <= cache_tol * norm(stored_input_data), the cached data for stored_input_data is returned when calling self.execute(input_data).

Raises

ValueError – When the discipline does not have a cache.

data_processor: DataProcessor

A data processor to be used before the execution of the discipline.

property default_inputs: dict[str, Any]

The default inputs.

Raises

TypeError – When the default inputs are not passed as a dictionary.

exec_for_lin: bool

Whether the last execution was due to a linearization.

property exec_time: float | None

The cumulated execution time of the discipline.

This property is multiprocessing safe.

Raises

RuntimeError – When the discipline counters are disabled.

executable_command: str

The executable command.

property folders_iter: gemseo.wrappers.disc_from_exe.FoldersIter

The names of the new execution directories.

The setter will check that the value provided for folder_iter is valid. This check is done by checking its presence in FOLDERS_ITER.

Raises

ValueError – If the value provided to the setter is not present in the accepted list of folders_iters list.

property grammar_type: gemseo.core.grammars.base_grammar.BaseGrammar

The type of grammar to be used for inputs and outputs declaration.

input_filename: str

The name of the input file.

input_grammar: BaseGrammar

The input grammar.

input_template: str

The path to the input template file.

jac: dict[str, dict[str, ndarray]]

The Jacobians of the outputs wrt inputs of the form {output: {input: matrix}}.

property linearization_mode: str

The linearization mode among MDODiscipline.AVAILABLE_MODES.

Raises

ValueError – When the linearization mode is unknown.

property local_data: gemseo.core.discipline_data.DisciplineData

The current input and output data.

property n_calls: int | None

The number of times the discipline was executed.

This property is multiprocessing safe.

Raises

RuntimeError – When the discipline counters are disabled.

property n_calls_linearize: int | None

The number of times the discipline was linearized.

This property is multiprocessing safe.

Raises

RuntimeError – When the discipline counters are disabled.

name: str

The name of the discipline.

output_filename: str

The name of the output file.

output_folder_basepath: str

The base path of the execution directories.

output_grammar: BaseGrammar

The output grammar.

output_template: str

The path to the output template file.

parse_outfile: Callable[[Mapping[str, tuple[int]]], Sequence[str]]

The function used to parse the output file.

re_exec_policy: str

The policy to re-execute the same discipline.

residual_variables: Mapping[str, str]

The output variables mapping to their inputs, to be considered as residuals; they shall be equal to zero.

run_solves_residuals: bool

If True, the run method shall solve the residuals.

property status: str

The status of the discipline.

time_stamps = None
write_input_file: Callable[[str, Mapping[str, ndarray], Mapping[str, tuple[int]], Sequence[int]], str]

The function used to write the input file.

class gemseo.wrappers.disc_from_exe.FoldersIter(value)[source]

An enumeration.

NUMBERED = 0
UUID = 1
class gemseo.wrappers.disc_from_exe.Parsers(value)[source]

An enumeration.

CUSTOM_CALLABLE = 2
KEY_VALUE_PARSER = 0
TEMPLATE_PARSER = 1
gemseo.wrappers.disc_from_exe.parse_key_value_file(_, out_lines, separator='=')[source]

Parse the output file from the expected text positions.

Parameters
• out_lines (Sequence[str]) – The lines of the output file template.

• separator (str) –

The separating characters of the key=value format.

By default it is set to =.

Returns

The output data in .MDODiscipline friendly data structure.

Return type

dict[str, float]

gemseo.wrappers.disc_from_exe.parse_outfile(output_positions, out_lines)[source]

Parse the output file from the expected text positions.

Parameters
• output_positions (Mapping[str, tuple[int]]) – The output position for each data name. The information from the template format {data_name:(start,end,dictionary)}, where name is the name of the output data, start is the index of the starting point in the input file template. This index is a line index (character number on the line) end is the index of the end character in the template line_number is the index of the line in the file

• out_lines (Sequence[str]) – The lines of the output file template.

Returns

The output data in .MDODiscipline friendly data structure.

Return type
gemseo.wrappers.disc_from_exe.parse_template(template_lines, grammar_is_input)[source]

Parse the input or output template.

This function parses the input (or output) template. It returns the tuple (names_to_values, names_to_positions), where:

• names_to_values is the {name:value} dict:

• name is the data name

• value is the parsed input or output value in the template

• names_to_positions describes the template format {name:(start,end,line_number)}:

• name is the name of the input data

• start is the index of the starting point in the input file template. This index is a line index (character number on the line)

• end is the index of the end character in the template

• line_number is the index of the line in the file

Parameters
• template_lines (Sequence[str]) – The lines of the template file.

• grammar_is_input (bool) – True for an input template, False otherwise.

Returns

A data structure containing the parsed inpout or output template.

Return type

tuple[dict[str, numpy.ndarray], dict[str, tuple[int]]]

gemseo.wrappers.disc_from_exe.write_input_file(input_file_path, data, input_positions, input_lines, float_format='{:1.18g}')[source]

Write the input file from the input data.

Parameters
• input_file_path (str) – The absolute path to the file to be written.

• data (Mapping[str, numpy.ndarray]) – The local data of the discipline.

• input_positions (Mapping[str, tuple[int]]) – The information from the template format {data_name:(start,end,line_number)}, where name is the name of the input data, start is the index of the starting point in the input file template. This index is a line index (character number on the line). end is the index of the end character in the template, line_number is the index of the line in the file.

• input_lines (Sequence[str]) – The lines of the input file template.

• float_format (str) –

The formating of the input data in the file (Default value = “{:1.18g}”).

By default it is set to {:1.18g}.

Return type

None