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Pyomo 6.8.0
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@mrmundt mrmundt released this 20 Aug 18:42
· 946 commits to main since this release
6.8.0
5609a8a
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Highlights of the 6.8 release series

  • Support for Numpy2
  • Refactor of Design of Experiments (contrib.doe)
  • New packages:
    • alternative_solutions: alternative (near) optimal solutions
  • New solver interfaces:
    • SAS: Statistical Analysis System
    • v2: Ongoing solver interface refactor
  • ...and of course numerous minor bug fixes and performance enhancements

Changes in this release

SIGNIFICANT CHANGE NOTICE

  • Internal data storage for Constraint objects (see #3293)
  • No longer release cythonized wheel for Python 3.11+ (see #3355)

CHANGELOG

  • General
    • Add ParameterizedQuadraticRepn and corresponding walker (#3324)
    • Update Pyomo for NumPy 2.0 compatibility (#3292, #3353)
    • Add ParameterizedLinearRepn and corresponding walker (#3268)
    • Update Release Process Workflow for changes in pip (#3355)
  • Core
    • Handle uninitialized variable in propagate_solution of scaling
      transformation (#3275)
    • Add context option to SuffixFinder (#3348)
    • Remove the _suppress_ctypes attribute from Block (#3347)
    • Improve Set initialization performance (#3302)
    • Update Constraint to only store the original expression (not
      lower/body/upper) (#3293)
    • Kernel: fix bug in conic geomean (#3310)
    • Fix bug with IndexedSet objects and the within argument (#3288)
    • Support validate/filter for IndexedSet components using index (#3338)
  • Solver Interfaces
    • Resolve NLv2 incompatibility with multithreading (#3332)
    • Resolve writer performance degradation (#3343)
    • Fix bug with inconsistent use of result and results (#3337)
    • LegacySolverWrapper: restore 'options' attribute (#3334)
    • Fix bug in XpressDirect._load_slacks (#3318)
    • NLv2: support expressions with nested external functions (#3319)
    • Ignore errors on ASL solver version check (#3298)
    • Add SAS solver interface (#2886, #3309)
  • Testing
    • Omnibus testing / platform portability fixes (#3335)
    • Change BARON download URL (#3328)
    • Disable interface/testing for NEOS/octeract (#3322)
    • Fix typo in Jenkins driver (#3312)
    • Jenkins: update logic for recording variables (#3311)
    • Unpin Codecov / Update coverage (#3303)
  • GDP
    • Don't transform known-to-be infeasible Disjuncts in multiple BigM (#3314)
  • Contributed Packages
    • alternative_solutions: Add a new contrib package for generating
      alternative solutions (#3270)
    • APPSI: Allow maingo_solvermodel to be imported without maingopy (#3330)
    • APPSI: Sort indices while removing constraints to fix bug in HiGHs
      interface (#3281)
    • CP: Add beforeChild handling for bools in logical expressions (#3315)
    • DoE: Refactor to improve API and maintainability (#3317)
    • incidence_analysis: Raise error in generate_strongly_connected_components
      instead of asserting (#3305)
    • parmest: Add missing main call for example file (#3349)
    • piecewise: Add incremental PW linear to MIP transformation (#3287)
    • piecewise: Add nonlinear-to-piecewise-linear transformation (#3333)
    • PyNumero: Support user-provided CyIpopt callbacks with 13 arguments (#3289)
    • PyNumero: Support PyomoNLP scaling factors on sub-blocks (#3295)
    • PyROS: Temporarily Adjust NL Writer Feasibility Tolerance (#3280)
    • viewer: Add option to specify the model by variable name (#3271)
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