OMMX Python SDK 2.6.x

See the GitHub Releases above for full details. The following summarizes the main changes.

New Features

Instance.substitute (2.6.0, #892)

Instance.substitute is now exposed in the Python SDK.

This method rewrites an Instance by substituting decision variables with expressions. The substituted variables are recorded as dependent variables so their values can be reconstructed when evaluating a solution.

See the Instance user guide for details and modeling caveats.

ParametricInstance.substitute (2.6.1, #898)

ParametricInstance.substitute is now exposed in the Python SDK.

This method substitutes decision variables while keeping parameter references symbolic. Assignment targets must be decision variables; attempting to substitute a parameter ID raises an error.

See the ParametricInstance user guide for the parameter-specific behavior.

Bug Fixes

Substitution validation and parameter materialization (2.6.1, #898)

Instance.substitute now rejects substitution expressions whose right-hand side references an undefined decision variable ID. ParametricInstance.substitute accepts right-hand side references only when they are registered decision variables or parameters.

ParametricInstance.with_parameters now also evaluates parameter references in decision_variable_dependency and removed_constraints, so the resulting Instance does not keep parameter IDs in those fields.