HISTORY

# 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.
2.7.0
    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