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HISTORY
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# PuLP, Copyright J.S. Roy (js@jeannot.org), 2002-2005
# Copyright S.A.Mitchell (s.mitchell@auckland.ac.nz), 2007-
# Copyright F.Peschiera (pchtsp@gmail.com), 2019-
# See the LICENSE file for copyright information.
2.9.0 2024-07-12
HiGHS available as solver
added HiGHS_CMD to github actions
deactivated warnings on msg=False
minor fixes
2.8.0 2024-01-12
mip start in HiGHS_CMD and SCIP_PY
GUROBI solver with environment handling
added COPT solver
added gurobi, highs, xpress, copt to github actions
cbc arm binary
fixes to SCIPS
took out deprecations in arguments
2.7.0
added HiGHS solver
added XPRESS_PY solver
fixed bugs
updated docs
2.6.0 2021-12-04
dropped packaged choco
fixed bugs
deprecated 'indexs' parameter LpVariable dicts and matrix
2.5.1 2021-09-28
updated docs
fixed minor issues
cbc now uses wall-time for timeLimit
2.5.0 2021-08-11
measuring wall time and cpu time
unittests of timeLimit
black formatting
refactored tests per solver
dropped support for CPLEX_DLL
2.4 2020-12-22
added mps reading support
updated docs
fix bug with no objective in prob.toDict()
2.3.1 2020-10-22
change naming of solver utility functions to camelcase
fixed gurobi license detection
fixed scip options and added timeLimit argument
changed docs
2.3 2020-08-04
Added plugin page in docs
Standardize arguments of solvers to appear in docs
Fixes to import and export of LpProblem and solver
Added warm start to GUROBI
2.2 2020-04-06
Contribution files
Standard arguments: logPath, gapRel, gapAbs
Import and export solver objects
Import and export LpProblem
Took out amply to its own package
Standard tmp file handling in _CMD solvers
Refactored writeMPS
2.1 2020-04-06
Added MOSEK solver
New documentation
Put tests inside package
Added warm start to CPLEX_PY
2.0 2019-11-23
Restructured solvers code
Added unittests package
Added CHOCO solver
Added warm start for CBC_CMD, GUROBI_CMD, CPLEX_CMD
Automated deploy
1.6.1, 2015-12-25
Fix for dummy variables
1.5.4, 2013-03-18
Added cbc support for osx (hopefully)
1.4.9, 2011-03-30
Added support for cplex runtime licenses
Made PULP_CBC_CMD the default LP solver for linux
Included 32 and 64 bit versions of cbc
1.4.8, 2011-03-30
Overdue fix for zero coeff issue
bugfix for default cat for LpVariable.dicts
moved tests to a different file
1.4.6, 2010-01-25
Bugfix
1.4.4, 2010-01-24
CBC 2.4 cmd line solver added
CoinMP dll 1.4.0 uses trunk version
CoinMP library object now accessed through COINMP_DLL.lib
Config files now include a %(here)s syntax to identify paths
Included solvers now moved to solvers directory
1.4.2, 2009-12-31
Fixes before coin Announcement
1.4.0, 2009-10-16
Added Elastic Constraints
Added Fractional Constraints (tests yet to be added)
Added limited resolve for gurobi
Changed version numbers for coin import
Fixed COIN_CMD
Changed code to be compatible with python 2.4
1.3.08, 2009-08-08
Bugfix COINMP_DLL
1.3.07, 2009/06/26
Changes for pypi
1.3.01, 2009/06/25
Made constraints ordered dictionaries
Small changes to parameters of COIN_DLL solver
Removed string exceptions
added the constraints from other LpProblems to LpProblem.extend()
1.3.00, 2009/06/21
Added GUROBI Solver
1.23, 2009/05/25
Removed old style MEM solvers
Cleaned up CPLEX_DLL interface
Added Sequential solve function
1.22, 2009/04/03
Added Cplex IntegerOptimalTolerence setMemoryEmphsis, and clarified linux
installation instructions
1.21.02, 2008/07/29
Added epagap, and logfile in CPLEX_DLL
1.21, 2008/07/28
Added Combination and Permutation functions
Bugfix for configsolvers
Updated setup.py to start to compile everything
1.20, 2008/06/08
Certified for inclusion in Coin-Or
Spilt the solver and constant definitions into separate files
Unit Tests make more explicit
Included external definitions for CoinMP.dll
No Makefile
1.11, 2008/03/01
Contributed by Stuart Mitchell s.mitchell@auckland.ac.nz.
Contains dll solvers that are accessed with the ctypes library.
Can use the CoinMP.dll solver from the coin-or project.
Added column-wise modelling and resolve capabilities.
Wiki added with plenty of examples aphi038@ec.auckland.ac.nz
1.9, 2007/08/06:
Stuart Mitchell
Added support for cplex 10.1.0 using ctypes library
Added support for the CoinMP.dll using ctypes library
Added distutils setup
Added a configuaration file pulp.cfg
1.1, 2005/05/03:
Fix an strange interpretation of unbounded integer variables by COIN and CPLEX
LP return codes are simplified.
C interface modules for GLPK, COIN and CPLEX
Windows compatibility
1.0, 2004/02/29: First release