Pyomo 6.4.0

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
• Added support for Python 3.10
• Removed support for Python 3.6
• New packages:
  • APPSI (Auto-Persistent Pyomo Solver Interfaces)
  • External grey box models
  • PyROS (Pyomo Robust Optimization Solver)
  • Structural model analysis
  • Rewrite of the TrustRegion Solver

Changes in this release

• General
  • Distribute the ampl_function_demo C source / cmake files (#2319)
  • Add GitHub URL to setup.py for PyPI (#2325)
  • Use constant indentation for long lines in the HierarchicalTimer (#2336)
• Core
  • Remove incomplete pyomo/core/base/alias.py module (#2284)
  • Remove Python 3.6 support (#2312)
• Solver Interfaces
  • Remove PICO solver interface (#2341)
• Testing
  • Add Windows pip single test (#2334)
  • Fix test docstrings in piecewise to silence warnings (#2342)
• Contributed Packages
  • APPSI: Update Gurobi solver unavailable message (#2320)
  • APPSI: Remove distributables for Windows (#2326)
  • APPSI: Fix bugs when working with the Gurobi solution pool (#2335)
  • APPSI: Fix bug in persistent update for FBBT (#2340)
  • Preprocessing: Stop using polynomial_degree to check for linear and
    constant expressions (#2324)
  • PyNumero: Improve coverage of mpi block matrix tests (#2318)
  • PyNumero: Skip bound/domain validation in ExternalPyomoModel (#2323)
  • PyNumero: Remove deprecated useage of numpy.bool (#2339)
  • PyROS: Fix variable default initialization (#2331)