1.2.5 (#139)

Bugfix: Add missing unpacking in symengine Mul

1.2.4 (#135)

Added minor symengine features

1.2.3 (#132)

Fix: allow bounds to be changed on binary variables
Fix: automatically convert problem type to LP after integer variables are removed

1.2.2 (#129)

- Fixed a couple of gurobi interface bugs
- Fixed a bug where cplex took forever to set a large objective (e.g. 10000 vars)
- Experimental support for symengine (requires Python >= 3.5, install with `conda install -c symengine python-symengine`)

1.2.1 (#111)

- Fix: A bug where objective values could be returned as sympy number types has been fixed.

1.2.0 (#110)

- Gurobi interface is officially not under construction anymore
- Tolerances can now be changed via the Model.configuration.tolerances interface
- Objectives with constant terms will now be handled correctly
- Getting solution values from GLPK is now more efficient

1.1.5

* fix: glpk get_linear_coefficients returns coefficients for the queried variables
* refactor: Batch value getters (_get_primal_values etc), that return list-like objects are introduced
* chore: disable logging with cplex when verbosity=0
* test: added more tests

1.1.4

* feat: add `SolverError` exception

This introduces the unified optlang error that should be reraised anywhere that
solver specific errors can occur. Third party code can then rely on catching the
optlang error only.

* Fix MIP dual behaviour

Raise a ValueError when trying to get constraint or variable dual values for an integer problem (instead of returning None)

* Fix: Adds functionality to automatically change the type of the cplex problem when changing variable types

* Change Module Loading Procedure

This fixes Issue #90 where, if any module fails to load, optlang itself cannot load.

* feat: cplex 12.7.1 compatibility

1.1.3

fix: make sure that sloppy arg is being passed to super (#83)
Netlib tests test also cloned models (#79)
Add a Gitter chat badge to README.rst (#86) (#88)

1.1.2: Various fixes (#78)

fix: objective.value should return None if not in model
fix: get correct primal values from glpk MIPs
test: add test for obj value without model
fix: allow older versions of cplex
Numerous gurobi fixes
Miplib test suite