Pyomo/pyomo 6.10.1

Pyomo 6.10.1

on GitHub

Highlights of the 6.10 release series

• Removed support for Python 3.9
• Removed hard dependency on ply
• New Model Observer package
• New initialization module for nonconvex, nonlinear problems
• New solver interfaces:
  • gams_v2 solver, writer, and solution loader
  • cuopt direct solver interface
  • scip direct and persistent solver interfaces
  • v2: Ongoing solver interface refactor
• ...and of course numerous minor bug fixes and performance enhancements

Changes in this release

• General
  • Resolve capture_output deadlock in multiprocessing environments (#3957)
  • Add SetOf domain; improve config's mock yaml dumper (#3872)
  • Bugfixes and testing of linear templates (#3781)
• Core
  • Remove pyomo.duality and pyomo.core.plugins.transform.model (#3876)
  • Improved ConstraintData.equality relational expression generation (#3893)
  • Add new KKT Transformation for generating KKT reformulations (#3881)
  • New options/mappings in the core.add_slack_variables Transformation (#3869)
  • Centralize processing of monomial terms in LinearRepn compiler (#3956)
• Documentation
  • Remove "deep" references to scipopt.org; update DOI for DoE paper (#3968)
  • Add AI policy to contribution guide (#3959)
  • Add a new template for tracking tasks (#3935)
  • Document use of 'Draft' status when reviewing PRs (#3918)
  • Improve documentation for mutable vs immutable Params (#3890)
  • Update README processing, version management (#3873)
  • Update URL for cyipopt documentation (#3909)
• GDP
  • Modify hull transform to allow a nonzero base point (#3880)
  • Add exact hull reformulation for quadratic constraints (#3874)
• Solver Interfaces
  • Fix memory leak in LegacySolverInterface wrapper (#3915)
  • Add direct and persistent interfaces to SCIP (#3744)
  • KNITRO: Add warm start support (#3833)
  • Handle cuOpt UnboundedOrInfeasible termination status (11) (#3916)
  • Fix bug in IPOPT version checking (#3862)
  • Add tests for trivial constraints (#3703)
  • Rework SolutionLoader (#3701)
• Testing
  • Add missing Ipopt guards (parmest); add GHA nosolvers test (#3962)
  • Unpin GAMS release; rebuild GHA package cache (#3950)
  • Update GHA TPL cache; resolve new test failures (#3865)
  • Temporarily pin to PyPy 7.3.20 (#3899)
  • Update actions; exclude mathworks from URL checks (#3900, #3929)
  • Bugfix for non-standard sed on OSX (#3901)
  • Update osx installers and urlchecker environment (#3914)
  • GHA: run tests on draft PRs (#3926)
  • Add NEOS solvers (#3919, #3924)
  • Disallow cplex 22.1.2.1 from conda (#3910)
• Contributed Packages
  • DoE: Fix trace/Cholesky initialization consistency (#3867)
  • DoE: Update documentation (#3812)
  • iis: Fix interface for current CPLEX releases (#3965)
  • initialization: New tools for initializing nonconvex NLPs (#3912)
  • mpc: Skip Expressions when loading MPC data (#3868)
  • MindtPy: Internal short circuit base (#3907)
  • MindtPy: Fix results returned when no discrete variables present (#3861)
  • parmest/DoE: Reorganizing Documentation Pages (#3904)
  • parmest: Simplify _Q_opt with block scenario structure (#3789)
  • parmest: Add regularization objective option (#3550)
  • piecewise: Factorable Programming for PWL Approximations (#3821)
  • piecewise: Separate linear terms in nonlinear_to_pwl transform. (#3814)
  • PyNumero: Efficiency change to sensitivity toolbox calculations (#3905)
  • PyNumero: Use Hessian approximation for grey-boxes sent to CyIpopt (#3892)
  • PyROS: Fix typos in PyROS CardinalitySet documentation (#3972)
  • PyROS: Extend the CardinalitySet to allow negative deviations (#3969)
  • PyROS: Add CartesianProductSet (#3927, #3951)
  • PyROS: Add caching for computed uncertain parameter bounds (#3877)
  • PyROS: Amend documentation of BudgetSet.budget_membership_mat (#3954)
  • TrustRegion: Remove direct manipulation of stdout (#3902)
  • TrustRegion: Add funnel globalization mechanism (#3823)