Pyomo is a Python-based open-source software package that supports a diverse set of capabilities for formulating, solving, and analyzing optimization models.

A core capability of Pyomo is modeling structured optimization applications.  The Pyomo software package can be used to define general symbolic problems, create specific problem instances, and solve these instances using standard commercial and open-source solvers.  Pyomo’s modeling objects are embedded within a full-featured high-level programming language with a rich set of supporting libraries that distinguishes it from other algebraic modeling languages such as AMPL, AIMMS and GAMS.

Pyomo supports a wide range of problem types, including:

  • Linear programming
  • Quadratic programming
  • Nonlinear programming
  • Mixed-integer linear programming
  • Mixed-integer quadratic programming
  • Mixed-integer nonlinear programming
  • Mixed-integer stochastic programming
  • Generalized disjunctive programming
  • Differential algebraic equations
  • Bilevel programming
  • Mathematical programming with equilibrium constraints

Pyomo also supports iterative analysis and scripting within a full-featured programming language providing an effective framework for developing high-level optimization and analysis tools. 

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Hart, William E.,