Pyomo/pyomo 6.6.1

Pyomo 6.6.1

on GitHub

Highlights of the 6.0 release series

• Improved stability and robustness of core Pyomo code and solver interfaces
• Integration of Boolean variables into GDP
• Integration of NumPy support into the Pyomo expression system
• Implemented a more performant and robust expression generation system
• Implemented a more performant NL file writer (NLv2)
• Implemented a more performant LP file writer (LPv2)
• Applied PEP8 standards throughout the codebase
• Added support for Python 3.10, 3.11
• Removed support for Python 3.6
• Removed the pyomo check command
• New packages:
  • APPSI (Auto-Persistent Pyomo Solver Interfaces)
  • CP (Constraint programming models and solver interfaces)
  • DoE (Model based design of experiments)
  • External grey box models
  • IIS (Standard interface to solver IIS capabilities)
  • MPC (Data structures/utils for rolling horizon dynamic optimization)
  • piecewise (Modeling with and reformulating multivariate piecewise linear functions)
  • PyROS (Pyomo Robust Optimization Solver)
  • Structural model analysis
  • Rewrite of the TrustRegion Solver

Changes in this release

• General
  • Update cmake builder for recent setuptools (#2847)
  • Fixing minor formatting for 6.6.0 release changes (#2842)
  • Silence deprecation warnings (#2854)
• Core
  • Update indentation handling in config.StringFormatter (#2853)
  • Restore slice API broken by #2829 (#2849)
  • Resolve handling of {}**0 in LinearRepn/QuadraticRepn (#2857)
• Solver Interfaces
  • NL writer: resolve error identifying vars in indexed SOS (#2852)
  • Manage Gurobi environments in GurobiDirect (#2680)
• Contributed Packages
  • cp: fix handling fixed BooleanVars in logical-to-disjunctive walker (#2850)
  • FBBT: Fix typo when handling GeneralExpression objects (#2848)
  • MindtPy: add support for cyipopt (#2830)