Changelog

0.5.1

  • Support llvmlite 0.45.0

0.5.0

  • Overhaul of the nonlinear programming interface and now PyOptInterface can solve nonlinear programming problems with COPT, Gurobi and IPOPT.

  • Use model.add_linear_constraint(x+y, (1.0, 2.0)) to add two-sided linear constraints

  • Add poi.ScalarAffineFunction.from_numpy to create scalar affine functions from numpy arrays quickly

0.4.1

  • Support writing solution files in HiGHS

  • Pass the names of variables and constraints to HiGHS

  • Add model.close() and env.close() methods to allow users release the license of commercial solvers manually

0.4.0

  • Add model.add_m_variables and model.add_m_linear_constraints matrix modeling API

  • Add model.computeIIS and IIS related attributes for constraint and variable

  • Implement constraint based on compare operators, now you can use model.add_linear_constraint(x + y <= 1.0) directly

  • Drop support for Python 3.8

  • Add wheels for Linux ARM64

  • Supports HiGHS 1.9.0 and Mosek 11

0.3.0

  • Add model.set_variable_bounds(variable, lb, ub) to make it easier to change variable bounds

  • Introduce nonlinear programming support of Ipopt

  • Support new versions of optimizers

  • Various minor bug fixes

0.2.8

  • Fix bugs in HiGHS and MOSEK when the quadratic objective function contains nondiagonal terms

0.2.7

  • Fix bugs in HiGHS termination status

0.2.6

  • Add rotated second-order cone support for COPT, Gurobi and Mosek

  • Add exponential cone support for COPT and Mosek

  • Requires COPT version >= 7.1.4 to support exponential cone

0.2.5

  • Fix add_linear_constraint of HiGHS optimizer to consider the constant term in expression correctly

  • Make make_tupledict slightly faster

0.2.4

  • Add map method for tupledict class

  • Add type stubs for C++ extension modules

0.2.3

  • Fix a bug when deleting constraint in HiGHS

0.2.2

  • Fix the performance issue with HiGHS optimizer

0.2.1

  • Fix the DLL search paths on Windows

0.2.0

  • Supports callback for Gurobi and COPT

  • Release GIL when calling model.optimize()

0.1.1

  • Add Model.write method to write model to files

0.1.0

  • First release on PyPI