Pyomo/pyomo 6.9.3

Pyomo 6.9.3

on GitHub

Highlights of the 6.9 release series

• Removed support for Python 3.8
• New Logic-Based Discrete-Steepest Descent Algorithm in GDPOpt
• New External Function for Cubic Spline Interpolation
• New ASL External Functions Library
• New solver interfaces:
  • Support for upcoming knitro Python package
  • v2: Ongoing solver interface refactor
• ...and of course numerous minor bug fixes and performance enhancements

Changes in this release

• General
  • Typo corrections (#3675, #3652, #3615)
  • Rework ConfigDict numpydoc generation support (#3667)
  • Improve TeeStream robustness (#3583, #3588, #3601, #3633, #3640)
  • Modernize infrastructure to use pyproject.toml (#3603, #3676)
  • Numpy2 compatibility fixes (#3607, #3636)
  • Allow custom messages in derived classes from PyomoException (#3596)
  • Resolve Python 3.14 compatibility issues (#3643)
  • Resolve an assortment of infrastructure errors (pkg_resources/GAMS) (#3644)
  • Introduce retries into download-extensions (#3656)
  • Add project-level default configuration for black (#3660)
• Core
  • Simplify declaration of custom blocks, support rule keyword args (#3570)
  • Bugfix: Evaluate name in message (#3580)
  • Map Constraint.Feasible/Infeasible to concrete constraints (#3546)
  • Rewrite core.relax_integer_vars transformation (#3586, #3645)
  • Disallow calling del_component with ComponentData arguments (#3440)
  • Initialize IndexSet from scalar functions returning dict (#3664)
  • Refactor linear/quadratic expression compilers (#3651)
  • Bugfixes for core.lp_dual transformation (#3672)
• Documentation
  • Remove outdated references to contrib.simplemodel (#3666)
  • Document and test dual sign convention (#3528)
  • Remove references to projects.coin-or.org (#3612)
  • Add solver information table to "Getting Started" (#3619)
  • Rework logic in building_documentation() (#3680)
• GDP
  • Enable parallel big-M calculation for gdp.mbigm transformation (#3641)
• Solver Interfaces
  • NL writer: resolve model scaling bug writing Expression objects (#3673)
  • Add qp support for HiGHS (#3531)
  • Update supported NEOS solvers (#3576, #3582, #3653)
  • Resolve GAMS/Windows logfile name issue (#3595)
  • Ensure full test list of solvers (#3598)
  • Suppress warmstart message from Xpress (#3599)
  • Resolve issues copying and pickling SolverResults (#3597)
  • Detailed IPOPT log parser in ipopt_v2 (#3577)
  • Fix how QUADOBJ section written to MPS files (#3609)
  • Correctly handle HighsModelStatus.kSolutionLimit (#3634)
  • More robust GAMS results parsing (#3642)
  • Mark expected failures for BARON 25.7.16 (#3662, #3665)
  • Bugfix for comparing results objects to other types (#3677)
  • Bugfix for SOS constraints and row_order option in lp writer (#3678)
• Testing
  • Exclude gnu.org from the URL checker tests (#3674)
  • Remove leftover files after testing (#3670)
  • Relax test tolerances due to changes in Xpress 45.1.1 (#3584)
  • Remove __version__ requirement for performance test driver (#3617)
  • Temporarily pinning scikit-learn version (#3625)
• Contributed Packages
  • APPSI: Remove debugging messages in appsi_highs (#3613)
  • aslfunctions: Add external function library (#3648)
  • cspline_external: Add utils to constrain parameter calculations (#3593)
  • DoE: Various bugfixes (#3574)
  • DoE: More verbose output for sensitivity analysis (#3525)
  • DoE: Add update_model utility updating suffix values (#3650)
  • mpc: Add time interpolation to data (#3559)
  • parmest: Fix inconsistent results when using seed in examples (#3621)
  • parmest: Bug fixes in main driver and example files (#3635)
  • PyNumero: Improve BlockVector numpy2 compatibility (#3585)
  • PyROS: Make exporting subproblems more customizable (#3649)
  • PyROS: Update separation priority ordering interface (#3581)
  • PyROS: Update uncertainty set validation methods (#3558)
  • PyROS: Adjust handling of separation objective evaluation errors (#3646)
  • sensitivity_toolbox: Pynumero: include independent variables (#3655)
  • sensitivity_toolbox: Add PyNumero-based functions (#3561)
  • simplification: Newer version of GiNaC - URL failure resolution (#3604)
  • viewer: Update for PyQt6, improve load time (#3647)