1.6.3

• improved performance for lazy constraints and cuts: now cbc assumes that cuts and lazy constraints are globally valid, just like in gurobi
• fix max_gap model property
• small doc improvements

1.6.2

• fix limit of max_solutions in cbc when specified as parameter in optimize

1.6.1

fix for lp_method in CBC

1.6.0

• selection of which linear programming method (Primal Simplex, Dual Simplex or
  Barrier) will be used to solve the root node relaxation (lp_method attribute
  of Model)

• read/write property RHS in Constraint

• do not throw exception when querying an unavailable solution: just return
  None instead, to fix problem in some debuggers

• improved documentation - specially for the examples

• pytest for tests - thanks @pmla

• continuous integration with travis

1.5.3

• better handling of lazy constraints and fix for querying variable types before optimization in CBC (updated binaries)
• fix query of objective function contents in cbc. thanks to @spoorendonk

1.5.2

• fix for constraint property slack in cbc

1.5.1

Fix for status in CBC when no solution found.

1.5.0

WARNING: this version requires some small changes for cut generators: since now Python-MIP fully supports both Cut Generators and Lazy constraints, we decided to add a base class

ConstrsGenerator with the method generate_constrs

cut generators and lazy constraints generators should derive from this class

the Model class has how two attributes:
cuts_generator and
lazy_constrs_generator

an object of type ConstrsGenerator can be added to one of these (or both), defining when the constraint generator will be called: in the first case it will be called when a fractional solution is found and in the second case it will be called when an integer solution is found.

1.4.3

Fix for repeated cuts and updated Mac binaries

1.4.2

Lazy constraints and SOS documented and working.