direct.py

LinearSolver that uses linalg.solve or LU factor/solve.

class openmdao.solvers.linear.direct.DirectSolver(**kwargs)

Bases: LinearSolver

LinearSolver that uses linalg.solve or LU factor/solve.

Parameters:

**kwargsdict

Options dictionary.

Attributes:

_lin_rhs_checkerLinearRHSChecker or None

Object for checking the right-hand side of the linear solve.

SOLVER = 'LN: Direct'

__init__(**kwargs)

Declare the solver options.

add_recorder(recorder)

Add a recorder to the solver’s RecordingManager.

Parameters:

recorder<CaseRecorder>

A recorder instance to be added to RecManager.

can_solve_cycle()

Return True if this solver can solve groups with cycles.

Returns:

bool

True if this solver can solve groups with cycles.

cleanup()

Clean up resources prior to exit.

does_recursive_applies()

Return False.

By default, assume linear solvers don’t do recursive apply_linear calls.

Returns:

bool

True if solver makes recursive apply_linear calls on its subsystems.

get_outputs_dir(*subdirs, mkdir=True)

Get the path under which all output files of this solver are to be placed.

Parameters:

*subdirsstr

Subdirectories nested under the relevant problem output directory. To create {prob_output_dir}/a/b one would pass solver.get_outputs_dir(‘a’, ‘b’).

mkdirbool

If True, attempt to create this directory if it does not exist.

Returns:

pathlib.Path

The path of the outputs directory for the problem.

get_reports_dir()

Get the path to the directory where the report files should go.

If it doesn’t exist, it will be created.

Returns:

str

The path to the directory where reports should be written.

property msginfo

Return info to prepend to messages.

Returns:

str

Info to prepend to messages.

record_iteration(**kwargs)

Record an iteration of the current Solver.

Parameters:

**kwargsdict

Keyword arguments (used for abs and rel error).

report_failure(msg)

Report a failure that has occurred.

The msg may be printed or ignored depending on the iprint option, and may raise an AnalysisError depending on the err_on_non_converge option.

Parameters:

msgstr

Message indicating the failure.

solve(mode, rel_systems=None)

Run the solver.

Parameters:

modestr

‘fwd’ or ‘rev’.

rel_systemsset of str

Names of systems relevant to the current solve. Deprecated.

use_relevance()

Return True if relevance should be active.

Returns:

bool

True if relevance should be active.

openmdao.solvers.linear.direct.format_nan_error(system, matrix)

Format a coherent error message when the matrix contains NaN.

Parameters:

system<System>

System containing the Directsolver.

matrixndarray

Matrix of interest.

Returns:

str

New error string.

openmdao.solvers.linear.direct.format_singular_error(system, matrix)

Format a coherent error message for any ill-conditioned mmatrix.

Parameters:

system<System>

System containing the Directsolver.

matrixndarray

Matrix of interest.

Returns:

str

New error string.

openmdao.solvers.linear.direct.index_to_varname(system, loc)

Given a matrix location, return the name of the variable associated with that index.

Parameters:

system<System>

System containing the Directsolver.

locint

Index of row or column.

Returns:

str

String containing variable absolute name (and promoted name if there is one) and index.

openmdao.solvers.linear.direct.loc_to_error_msg(system, loc_txt, loc)

Given a matrix location, format a coherent error message when matrix is singular.

Parameters:

system<System>

System containing the Directsolver.

loc_txtstr

Either ‘row’ or ‘col’.

locint

Index of row or column.

Returns:

str

New error string.