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CHANGELOG.txt
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===============
Pyomo CHANGELOG
===============
-------------------------------------------------------------------------------
Pyomo 5.7.2 17 Dec 2020
-------------------------------------------------------------------------------
ADVANCE CHANGE NOTICE:
- This is the last Pyomo release to support Python 2.7, 3.4, and 3.5
- This is the last Pyomo release to bundle PySP
- This is the last Pyomo release that will have a strict PyUtilib dependency
- General
- Increase timeout when loading libraries through CtypesEnviron (#1644)
- Add support for deferred import of submodules (#1683, #1729)
- Overhaul imports to replace 'import *' and remove unused imports (#1607)
- Move pyutilib.misc Bunch/Container/Options imports to
pyomo.common.collections (#1708, #1735)
- Move pyutilib.common exceptions to pyomo.common.errors (#1694, #1733)
- Move pyutilib.misc.timing to pyomo.common.timing (#1688)
- Move pyutilib.misc.config into pyomo.common.config (#1687)
- Move pyutilib.factory to pyomo.common.factory (#1695)
- Move pyutilib.misc.gc_manager to pyomo.common.gc_manager (#1716)
- Move pyutilib LogHandler to pyomo.common.log (#1717)
- Move pyutilib.services.tempfiles to pyomo.common.tempfiles (#1742)
- Make logger and ostream public attributes in the TicTocTimer (#1714)
- Update management of matplotlib imports (#1738)
- Add utility function to get slice of component along certain set (#1639)
- Remove unused pyomo.solvers.plugins.testdriver directory (#1750)
- Core
- Use name buffer in add_slack_variables transformation (#1637)
- Make Constraint.Feasible be an alias for Constraint.Skip (#1676)
- Updates to slicing infrastructure and documentation (#1638, #1736)
- Add public API for checking Param mutability (#1651)
- Update methods for differentiating Pyomo expressions (#1663)
- Add skip_stale_vars option to store_to function (#1679)
- Improve Block initialization (#1703)
- Update ComponentUID to improve serialization and leverage slicing
(#1652, #1713, #1748)
- Extend Reference function to accept Sequence and Mapping derivatives (#1739)
- Fix bugs in deepcopying/pickling units (#1743)
- Fix cloning AMPLExternalFunction objects after external library is
loaded (#1745)
- Improve log message when loading solution with 'warning' status (#1752)
- Solver Interfaces
- Fix typo in Gurobi direct interface (#1649)
- Explicitly close log files for cplex_direct (#1655)
- Deprecate use of base64.decodestring in Python 3 NEOS interface (#1661)
- Improvements to MOSEK direct interface, new persistent interface,
add license check to tests, resolve incompatibilities with
Python 2.7 (#1686, #1746)
- DAE Updates
- Improve performance of discretization transformations (#1727)
- Allow flattener to find constraints that skip the first index (#1720)
- GDP Updates
- Rewrite of gdp.cuttingplane transformation (#1668)
- Fix handling of local variables in gdp.hull
- PySP Updates
- Defer import of profiling packages and guppy module (#1677, #1697)
- Fix integer conversion of string arguments in ProgressiveHedging (#1684)
- Testing
- Update Jenkins driver to resolve codecov report upload (#1670)
- Update slim and cythonized builds in GitHub Actions and Jenkins
drivers (#1674)
- Fix security risk in GitHub Actions workflow (#1654)
- Bundle GitHub Actions coverage report uploads (#1680)
- Create Pyomo-specific unittest.TestCase and update fragile test (#1682)
- Add python-louvain to testing infrastructure (#1646)
- Update the idaes-ext download in the GitHub Actions workflows (#1698)
- Make pyomo.common.timing tests more flexible (#1711)
- Rename assertRelativeEqual to assertStructuredAlmostEqual (#1719)
- Replace ubuntu-latest with ubuntu-18.04 in GitHub Actions workflows (#1709)
- Change GitHub Action setup-miniconda action to version 2 (#1696)
- GitHub Actions: add linux/conda and linux/parallel builds (#1725)
- Timing updates (#1728)
- Remove Travis-CI test driver and references to Travis-CI (#1722)
- Resolve test failures with xpress 8.11 (#1706)
- Fix installation of pymumps through conda in GitHub Actions (#1731)
- Add TPLs, update solver PATH, and remove solvers from SLIM builds in GitHub
Actions tests (#1732)
- Add Gurobi to GitHub Actions workflows (#1721)
- Add Python 3.9 to test suite (#1753, #1755)
- Documentation
- Add docstrings in pyomo.util.config (#1707)
- Contributed Packages
- Add new package for performing Louvain community detection on a
Pyomo model (#1526)
- FME: treat bounds of variables being projected as constraints in the
transformation (#1664)
- MindtPy: add extended cutting plane and global OA strategies (#1590)
- Parmest: bug fix in return_values, resolve example incompatibility with
Python<3.5, use CUID v2 representations, update handling of indexed
stage variables (#1645, #1699, #1734, #1737)
- PyNumero: add ENABLE_HSL cmake option, extend Cyipopt solver
interface, improve MPI Matvec performance, update mumps interface to
use attempt_import, performance enhancements to pynumero.sparse,
misc updates (#1632, #1653, #1610, #1667, #1681, #1705, #1724)
-------------------------------------------------------------------------------
Pyomo 5.7.1 15 Sep 2020
-------------------------------------------------------------------------------
- General
- Add functions for checking the solver termination condition to environ (#1540)
- Remove appdirs dependency (#1558)
- Setting version number for new deprecation warnings (#1524)
- Add generic tarball creation to GitHub Actions Workflow for creating Wheels
(#1522)
- Deprecate pyomo install-extras (#1521)
- Add test to monitor 'import pyomo.environ' time (#1577)
- Move ComponentMap and ComponentSet to pyomo.common.collections (#1593)
- Fix issue when parsing /etc/os-release (#1603)
- Fix deprecation decorator tests (#1629)
- Core
- Add a logical expression system (#1507)
- Resolve table formatting with unicode character data (#1530)
- Fix Model.compute_statistics method (#1553)
- Deprecate CUID targets in add_slack_variables transformation (#1563)
- Defer import of sympy in the cnf_walker (#1576)
- Minor fixes to units (#1582, #1584)
- Add IndexedSet.data method that was mistakenly removed (#1609)
- Add support for class method initializers (#1608)
- Rework constraint initialization (#1592)
- Remove truthiness assumption for sequence in TuplizeValuesInitializer (#1620)
- Add deprecated support for Var(within=RealSet) (#1619)
- Fix standard repn of external functions with fixed arguments (#1623)
- Solver Interfaces
- Use Baron option to more consistently return duals (#1538)
- Add direct and persistent interfaces to Xpress (#1443)
- Augment persistent solver interfaces to support column generation (#1568)
- DAE Updates
- Add options to solve_consistent_initial_conditions (#1534, #1606)
- Add find_nearest_index method to ContinuousSet (#1559)
- Allow flattening of ctypes other than Var (#1583)
- GDP Updates
- Fix a couple bugs in GDP basic steps (#1532)
- Make key for calculated M values in bigM dictionary consistent (#1618)
- Testing
- Fix to retry codecov upload if codecov.sh script fails (#1539)
- Update to GitHub Actions tests to fix an OSX Python environment failure (#1555)
- Allow failing codecov uploads on GitHub Actions tests (#1561)
- Add doctests to the GitHub Actions builds (#1542)
- Add manual job trigger for GitHub Actions Workflows (#1578)
- Rebuild GitHub Actions download caches (#1598)
- Disable OS package cache for OSX (#1625)
- Documentation
- Clean up some old documentation on sparse sets (#1545)
- Remove OnlineDocs spy files from the repository (#1549)
- Resolve RTD documentation build warnings (#1552)
- Fix typo in code snippet (#1624)
- Update contribution guide (#1621)
- Contributed Packages
- Defer the Z3 availability check in the satsolver (#1529)
- MindtPy: add configuration arguments, bug fixes (#1500)
- Parmest: fix solver options typo, update graphics module (#1531, #1622)
- PyNumero: Add scaling to Cyipopt interface, set AMPLFUNC before loading NL
files, improve MPI matvec performance (#1554, #1546, #1610)
- Fix bugs in sensitivity toolbox (#1536, #1574)
- Add integer arithmetic option to FME transformation (#1594)
-------------------------------------------------------------------------------
Pyomo 5.7.0 19 Jun 2020
-------------------------------------------------------------------------------
- General
- Remove references to Python versions older than 2.7 (#1361)
- Fix Python 3 compatibility issue in setup.py (#1354)
- Updates to the FileDownloader, fix Python 3 type issue, add utility for
identifying os platform, improve find_library method (#1353, #1368, #1373)
- Fix tokenization, update errors in the DAT parser (#1366, #1516)
- Fix typo in relax_integrality deprecation warning (#1385)
- Promote __version__ identifier to the pyomo module scope (#1390)
- Update to only compute is_fixed when necessary (#1402, #1415)
- Add ConfigEnum class (#1418)
- Prevent exception for transformations missing doc string (#1454)
- Automate wheel creation using GitHub actions (#1409)
- Replace uses of pyutilib.enum package (#1506)
- Core
- Units support for Pyomo components and models (#1341, #1460, #1494, #1504)
- Integrate new Set component implementation (#1319)
- Add deprecation warning for Set.value_list (#1371)
- Fix bug when constructing empty sets with dimen>1 (#1377)
- Rename component.type() to component.ctype (#1376)
- Fixes for linear expression handling (#1403, #1405)
- Fix handling of deactivated blocks in relax_integer_vars transformation (#1428)
- Fix component_data_objects for scalar components with no len() (#1436)
- Ensure block rules are always called (#1438)
- Fix construction of scalar derived blocks (#1459)
- Updates to native Pyomo differentiation (#1423)
- Expand expression template support (#1433)
- Ensure sympy configuration happens (#1470)
- Add deprecation wrapper for old StreamBasedExpressionVisitor API (#1488)
- Identify squared linear sums as quadratic in generate_standard_repn (#1493)
- Check for consistent dimensions when slicing (#1492)
- Solver Interfaces
- Updates to GAMS interface, update GAMSDirect.available to catch unexpected
exceptions, add GDX interface for returning solution values, improve error
reporting from GAMS, fix handling of fixed variables in LinearExpressions
(#1351, #1446, #1382, #1463)
- CPLEXDirect performance improvements (#1416)
- Improve Baron warning for ResName/TimName options (#1486)
- PySP Updates
- Clean up PySP sizes example (#1395)
- Remove use of pyutilib.enum package (#1464)
- GDP Updates
- Rewrite of the Chull transformation (#1421)
- Fix bug in bigm transformation for nested disjunctions (#1479)
- Rename gdp.chull transformation to gdp.hull (#1471)
- Deprecate GDP reclassify transformation (#1502)
- DAE Updates
- Add DAE set manipulation utilities (#1288)
- Add function for identifying and solving for consistent initial conditions (#1410)
- Fix DAE flattener for non-time-indexed blocks (#1489)
- Network Updates
- Update to cast fixed values back to float (#1469)
- Testing
- Update Travis badge to reflect migration from .org to .com (#1364)
- Add test coverage to linux/osx GitHub actions (#1359)
- Update Baron, Ipopt, gjh_asl_json, Xpress solvers in GitHub actions
(#1378, #1393, #1394, #1452)
- Unified GitHub actions workflow (#1426)
- Disable Appveyor testing (#1447)
- Update coverage configuration and reporting (#1451, #1455, #1457, #1462)
- Solver testing improvements (#1473)
- Documentation
- Update RangeSet docstring (#1437)
- Expand developer documentation (#1472)
- Update README.txt for building the Sphinx documentation (#1480)
- Add documentation for sensitivity_toolbox (#1481)
- Contributed Packages
- PyNumero updates, add CyIpopt interface, enable build through
build-extensions, add HSL interface, package reorganization, add operations
for block vectors/matrices, fix broken examples (#1356, #1412, #1381, #1419,
#1439, #1467, #1518)
- Add Fourier-Motzkin elimination (FME) transformation (#1370, #1440)
- GDPOpt updates, fix use of numeric derivatives, preserve implicit config
options (#1422, #1432,)
- Mindtpy updates, add lp/nlp algorithm, bug fixes, documentation, fix
warmstart, add cycling check (#1391, #1476)
- Fix and deprecate constraint tightener transformation in the preprocessing
module (#1458, #1388)
- FBBT updates, fix numerical issues (#1360)
- parmest updates, add ScenarioCreator, update data in example to match paper
results, calculate covariance matrix (#1363, #1474, #1475)
- Add basic interior point algorithm based on PyNumero (#1450, #1505, #1495)
-------------------------------------------------------------------------------
Pyomo 5.6.9 18 Mar 2020
-------------------------------------------------------------------------------
- General
- Fix bug and improve output formatting in pyomo.util.infeasible (#1226, #1234)
- Add 'version' and 'remove_in' arguments to deprecation_warning (#1231)
- Change NoArgumentGiven to a class and standardize useage (#1236)
- Update GSL URL to track change in AMPL SSL certificate (#1245)
- Clean up setup.py (#1227)
- Remove legacy build/test/distribution scripts (#1263)
- Use dict comprehension for constructing dictionaries (#1241)
- Fix report_timing for constructing objects without index_set (#1298)
- Add missing import for ftoa (#1320)
- Add attempt_import and standardize yaml imports (#1328)
- Add get_text_file method to the FileDownloader (#1330)
- Add helper function to retrieve solver status (#1335)
- Speed up import of pyomo.environ (#1344)
- Core
- Update Units test to handle Pint 0.10 (#1246)
- Move blockutil.py from pyomo/core to pyomo/util (#1238)
- Deprecate pyomo.connectors (#1237)
- Add initial implementation for a MatrixConstraint (#1242)
- Fix _BlockData set_value() (#1249)
- Raise error on failed Param validation (#1272)
- Fix return value for component decorator (#1296)
- Change mult. order in taylor_series_expansion for numpy compatibility (#1329)
- Deprecate 'Any' being the defalt Param domain (#1266)
- Solver Interfaces
- Update CPLEX direct interface to support CPLEX 12.10 (#1276)
- Shorten GAMS ShortNameLabeler symbols (#1338)
- Add branching priorities to CPLEXSHELL (#1300)
- PySP updates
- Added a csvwriter test to the rapper tests (#1318)
- Fix csvwriter when NetworkX used to specify the scenario tree (#1321)
- GDP updates
- Update BigM estimation for nonlinear expressions (#1222)
- Refactor GDP examples for easier testing (#1289)
- Rewrite of BigM transformation (#1129)
- DAE updates
- Add a flatten_dae_variables utility (#1315, #1334)
- Network updates
- Allow disabling split_frac and correct bounds on duplicated variables (#1186)
- Testing
- Remove 'nightly' tests from the 'expensive' suite (#1247)
- Set up GitHub actions for Linux, OSX, and Windows testing (#1233, #1232,
#1230, #1262, #1277, #1317, #1281, #1323, #1331, #1342)
- Clean up Travis driver (#1264)
- Update Appveyor driver (#1293, #1343)
- Add GitHub Actions workflow for testing forks/branches (#1294)
- Update tests to use sys.executable to launch python subprocesses (#1322)
- Improve testing and coverage reporting for MPI tests (#1325)
- Update codecov config to reduce failing coverage checks on PRs (#1345)
- Documentation
- Remove CBC from installation documentation (#1303)
- Add GitHub Actions documentation to the contribution guide (#1316)
- Documentation for using indexed components in persistent solver interfaces
(#1324)
- Documentation for developers on using forks (#1326)
- Contributed Packages
- Deprecate pyomo.contrib.simplemodel (#1250)
- Updates to GDPopt, Merge GDPbb into GDPopt (#1255, #1268)
- PyNumero updates, redesign of NLP interfaces API, support for Windows,
updates to PyNumero.sparse, add MUMPS interface (#1253, #1271, #1273, #1285,
#1314)
- FBBT fixes and tests (#1291)
- Updates to Parmest, support for leave-N-out sampling and data reconciliation,
graphics and documentation improvements (#1337)
- Fix Benders MPI logic bug and expand parallel test coverage (#1278)
-------------------------------------------------------------------------------
Pyomo 5.6.8 13 Dec 2019
-------------------------------------------------------------------------------
- General
- Fix collections imports for Python 3.x (#1175)
- Add verbose logging options for infeasibility testing (#1207)
- Core
- Remove deprecated call to formatargspec in Python 3.x (#1174)
- Remove old, unreachable code in PyomoModel.py (#1189)
- Clean up default argument for variable fix method (#1221)
- Solver Interfaces
- Fix incorrect precision warnings in the GAMS and BARON writers (#1166)
- Fix typo in MOSEK problem status handling (#1170)
- Fix bug in NEOS interface for Python 3.x (#1206)
- DAE updates
- Fix bug in get_index_information (#1195)
- Remove use of _implicit_subsets (#1197)
- PySP updates
- Expose options for CC and CVaR in the rapper interface (#1211)
- Testing
- Disable extras on Appveyor Python 3.7 build (#1180)
- Add Python 3.8 to Travis test suite (#1182)
- Updates to Jenkins build infrastructure (#1216)
- Documentation
- Minor updates for PySP, GDP, stream-based walkers, and installation
(#1168, #1191, #1204, #1208)
- Contributed Packages
- Add MC++ compiled library version checking (#1172)
- Fix minor type mismatch in PyNumero (#1214)
- Fix deprecation warning in Mindtpy (#1188)
- Add test skipping to trust region tests requiring IPOPT (#1220)
-------------------------------------------------------------------------------
Pyomo 5.6.7 7 Nov 2019
-------------------------------------------------------------------------------
- General
- Update links to tutorials and examples in the README (#1082)
- Verify Python 3.8 support (#1162)
- Core
- Add a guard in getname for ComponentData with no parent (#1075)
- Add support for sqrt in Python-based AD implementation (#1086)
- Add methods to IndexedVar to set bounds for all indices (#1087)
- Replace ReciprocalExpression with DivisionExpression (#989)
- Fix bug where Set multiplication changed the original Sets (#1103)
- Improve ease of use of LinearExpression constructor (#1097)
- Tech preview of the Set component hierarchy rewrite (#1111)
- Add a get_interval method for Sets (#1128)
- Update pprint method for derived classes and add support for printing
ComponentData (#1043)
- Create a common interface for differentiation (#1059)
- Add function to calculate the Taylor series approximation of an
expression (#1059)
- Fix in Sympy interface to avoid complex numbers (#1140)
- Add support for log10 in differentiation (#1145)
- Solver Interfaces
- Fix bug in BARON and GAMS writers for handling exponential expressions (#1114)
- Improve Gurobi persistent interface, enable callbacks, lazy constraints,
and more (#1137)
- MPEC updates
- Update transformations to descend into disjuncts (#1085)
- PySP updates
- Replace Graph.node with Graph.nodes to support networkx 2.4 (#1141)
- GDP updates
- Use a name buffer when generating component names (#1149)
- Testing
- Add pathos library to the Appveyor build (#1135)
- Contributed Packages
- Model viewer improvements and bug fixes (#1071, #1092)
- MindtPy outer approximation improvements (#983)
- GDPOpt improvements, support for Ports (#1098, #1133)
- FBBT improvements and bug fixes, updates to interval arithmetic, support
for log10, replace math.inf with float('inf') (#1131, #1134, #1102, #1078,
#1076, #1146)
- Documentation
- Fix typo in working_models.rst (#1094)
- Add documentation for user interface to LinearExpression (#1120)
-------------------------------------------------------------------------------
Pyomo 5.6.6 21 Jun 2019
-------------------------------------------------------------------------------
- Core
- Remove a line in standard_repn that was unreachable (#1063)
- Solver Interfaces
- Fix symbolic labels for BARON and GAMS (#1057)
- Fix in cplex_direct to check for solution before extracting bounds (#1060)
- Fix in NL writer where a single-term sum output a n-ary operator (#1067)
- Contributed Packages
- FBBT improvements (#1002)
- Benders improvements (#1061)
- GDPopt updates (#922, #1065)
- Model viewer improvements, add residual table, improved install/testing,
support for AbstractModels (#955, #1054, #1066)
-------------------------------------------------------------------------------
Pyomo 5.6.5 10 Jun 2019
-------------------------------------------------------------------------------
- General
- Remove non-ascii character from README.md (#1045)
- PySP
- Fix docstring formatting (#1042)
- Testing
- Resolve book test failures (#1038)
- Contributed Packages
- Benders cut generator component (#1028)
-------------------------------------------------------------------------------
Pyomo 5.6.4 24 May 2019
-------------------------------------------------------------------------------
- General
- Resolve project description rendering on PyPI
-------------------------------------------------------------------------------
Pyomo 5.6.3 24 May 2019
-------------------------------------------------------------------------------
- General
- Update the README (#990, #991, #992)
- Fix compilation with Cython
- Change the default use_signal_handling from True to None (#1014)
- Testing
- Add a license check for Mosek (#1007)
- Add a Cythonization test to Travis (#1012)
- Core
- Bug fix in IndexedComponent using a nonhashable object as an index (#1006)
- Bug fix in fix_discrete transformation for domain comparison (#996)
- Add read-only view of kernel matrix_constraint (#1011, #1013)
- Add specialized conic constraints to kernel (#980, #1018)
- Bug fix in standard repn when using a fixed variable as an exponent (#978)
- Add _associativity to _ExpressionData (#1031)
- Solver Interfaces
- Bug fix in CBC plugin related to certain objective values (#1004)
- Contributed Packages
- FBBT improvements (#994)
- MC++ variable bound guards (#1015)
- Improvements to bounds_to_vars preprocessing transformation (#1016)
- GDPbb improvements and cleanup (#982)
-------------------------------------------------------------------------------
Pyomo 5.6.2 1 May 2019
-------------------------------------------------------------------------------
- General
- Fix setup.py for Windows installation with Python3 and Cython (#823)
- Reorganize how Pyomo manages the version number (#854)
- Updated build badges on main Github page (#867)
- Fix bug in model size report utility (#904)
- Catch eval errors in calculate_variable_from_constraint utility (#872)
- Add project description file used by COIN-OR server (#891)
- Add common utility for downloading files (#819, #927)
- Add infrastructure for building compiled extensions (#940, #959)
- Return the subcommand error code from the pyomo script (#958)
- Fix the "pyomo install-extras" command (#981, #986)
- Deprecate pyomo.bilevel and pyomo.duality (#943)
- Update deprecation decorator to include version number (#943)
- Testing
- Update Appveyor configuration to use --no-update-deps conda option (#837)
- Enable publication of coverage results from Jenkins (#842, #892)
- Update Travis configuration with new docker image location (#880)
- Activate coverage for Anaconda Travis builds (#887)
- Update DataPortal tests requiring PyYaml to not rely on file diffs (#931)
- Add simplified Jenkins test driver (#949, #952, #960)
- Restrict auto-build of PyomoGallery to master branch builds (#985)
- Core
- Reference improvements to support sparse components (#830)
- Fixed typo on Var docstring (#865)
- Initial support for units handling (#833)
- Make component slice objects picklable/deepcopyable (#914)
- Allow variable identification for LinearExpression (#920)
- Split expr_pyomo5.py into three files (#888)
- Fix ordered sets not iterating in correct order (#936)
- Add SimpleBlock to pyomo.core namespace (#941)
- Kernel updates (#951)
- Fix expression infix representation (#966)
- Solver Interfaces
- Add logic to control signals in shellcmd solvers (#856)
- Narrow the check for a valid Baron license (#857)
- Add missing import to kestrel_plugin.py (#895)
- Allow '~' in CPLEX file names (#925)
- Updates to CBC plugin to handle all return statuses and support warm starts
(#874, #946)
- Add Mosek solver plugin (#971)
- GDP updates
- Add nonconvex heat exchanger network example (#824)
- Bugfix for GDP Var mover (#667)
- Add basic step example (#848)
- Add GDP logo (#873, #876)
- Improve error message in GDP reclassification (#884)
- Updates to Stickies example (#937, #948)
- Simplify the fix_disjuncts transformation (#921)
- DAE updates
- Use ConfigBlocks for discretization options handling and several bug fixes
(#967, #973)
- Network updates
- Fix sequential decomposition when ports contain References (#975)
- Contributed Packages
- ParmEst updates to make API more flexible, updated examples, documentation
and tests (#814)
- GDPopt algorithm enhancements, cut generation bug fix, add example
to tests, time limit option support (#805, #826, #852, #970)
- Multistart solver wrapper bug fix for identifying the Objective (#807)
- Updates to MC++ interface and documentation (#827, #929, #939, #964, #968)
- Add import guards for optional packages like Scipy and Pandas (#853, #889)
- PETSc wrapper fixes and enhancements (#806)
- Disjunctive bound tightening with GLOA (#877)
- Use CBC for GDP_bounds OBBT computation (#933)
- Set minimum Numpy version for Pynumero (#962)
- New packages:
- Mixed-Integer Decomposition Toolbox in Pyomo (MindtPy) (#386, #970)
- Feasibility based bounds tightening (#825, #863, #883, #954)
- GDP branch and bound solver (#847, #870, #886)
- Satisfiability solver interface to z3 (#862, #885)
- Automatic/symbolic differentiation of Pyomo expressions in Python
(#818, #926)
- Graphical model viewer/editor (#834, #878, #897, #911, #945)
- Documentation
- Show how to extend an objective function (#820)
- Show how to use PySP with a ConcreteModel (#831)
- Update documentation on assigning values to a Param (#841)
- Update Set documentation (#850)
- Fixed typo in overview documentation (#864)
- Show how to activate/deactivate constraints (#932)
-------------------------------------------------------------------------------
Pyomo 5.6.1 18 Jan 2019
-------------------------------------------------------------------------------
- General
- Fix setup.py installation failure on Windows (#813)
- Testing
- Add assertion method for comparing lists of floats (#800)
- Solver interfaces
- Bugfix in GAMS writer related to splitting long lines (#797)
- Allow ":" in cplex file names (#810)
- Fixes to NEOS interface (#793)
- GDP updates
- Fixed typo in GDP example (#801)
- Add support for RangeSet in GDP transformations (#803)
-------------------------------------------------------------------------------
Pyomo 5.6 19 Dec 2018
-------------------------------------------------------------------------------
- General
- Removing testing and support for Python 2.6 (#322)
- Adding TerminationCondition and SolverStatus to pyomo.environ (#429)
- Refactoring pyomo.util into pyomo.common for the general utilities that do
not depend on the rest of Pyomo, and the user-focused modeling utilities in
pyomo.util. (#502)
- New utilities: Model size report (#579), calculating variable
values (#763)
- Fix pyomo help -s command (#551)
- Fixes to avoid deprecation warnings (#760, #765)
- Core
- Adding the Pyomo5 expression system, which supports PyPy (#272,
#471, #475, #514, #520, #524, #536, #615)
- Optimizations to minimize use of NumericConstant objects (#469)
- Implemented a general-purpose expression visitor (#671)
- Implicitly order Pyomo sets based on insertion order (#568)
- Fix for overriding values in IndexedSets (#710)
- Efficiency improvements when processing unhashable indexes (#467)
- Replace PyUtilib factories with native Pyomo factories (#661)
- unique_component_name now checks all attributes (not just components) (#497)
- Adding relative_to argument for getname() (#495)
- Add 'SubclassOf' to support finding components based on sub class (#723)
- Move PseudoMap out of _BlockData class (#778)
- Add Reference "component" (#655, #742)
- Transformations map create_using arguments through the model clone (#497)
- Implemented a scaling transformation (#694)
- Improvements for External Functions
- Resolved problems with ExternalFunctions with fixed arguments (#442)
- Add method to return F,G,H from AMPL external functions (#666, #668)
- Improvements to symbolic expressions
- Add support for sqrt function in differentiate() (#642)
- Update symbolic differentiation to be compatible with sympy 1.3
and performance improvements (#715, #719)
- Silence invalid error messages logged with Template Expressions (#634)
- Kernel improvements
- Move kernel util (#522)
- Kernel updates (#761)
- Kernel updates simplifying handling of active status on containers,
save storage key on child, warn overwriting container index, fix
linear_canonical_form flag on linear_constraint (#569, #570, #571,
#589, #598)
- Solver interfaces
- Fix to solver tempfiles (#590)
- Prevent crash when solver returns suffixes but not values for
variables (#596)
- Resolving issue when path names with spaces appear in CPLEX run file (#485)
- Fix for spaces in cplex file names (#586)
- Bugfix in Gurobi direct interface (#635)
- Fix NEOS interface when behind a proxy in Python 3.x (#644)
- Fixed Baron writer sqrt error (#751)
- Corrected Ipopt capabilities (#573)
- GAMS writer
- fix for power() expressions (#454)
- fix for fixed variables (#510)
- ShortNameLabeler to limit symbol names (#512)
- Add warning about zero division in variable evaluation (#529)
- Use tmpdir for subprocess files (#530)
- Integrate options attribute (#558)
- Change writer ctype checking (#593, #641)
- Fix double-operator due to negative constant (#698)
- Fix Windows stdout compatibility issue (#779)
- LP writer
- More efficient string manipulation in LP writer (#610)
- Fix generation of bounds for fixed variables in LP writer (#623)
- Cythonized writers in pyomo.repn (#675)
- Bilevel:
- Create pyomo.dualize (#606)
- Updates to dualization and bilevel solvers (#535)
- DAE updates
- Added support for external functions (#526)
- Bugfix in Casadi interface (#544)
- Code overhaul and improved test coverage (#660)
- GDP updates
- Implemented improper basic steps (#582)
- Add examples from literature (#581, #702)
- Improve BigM test robustness (#659)
- Bug fixes (#490, #498)
- PySP updates
- Python 3.7 support (#463)
- Fix bugs in finance example (#564, #578)
- Added a wrapper for PySP to create a scripting interace (#689, #727, #737)
- Bug fixes (#736, #788)
- New packages:
- DataPortal:
- Move DataPortal up to a top-level pyomo.dataportal subpackage (#607)
- Update options for pymysql (#678)
- Network
- Replaced Pyomo connector infrastructure with Pyomo.Network and
added sequential modular simulation capability (#583, #648)
- Contributed packages:
- GDPopt updates to use config blocks, support integer variables,
documentation, callback renaming, new initialization strategy
(#513, #541, #595, #599, #633, #650, #717)
- Update trust region to use ConfigBlocks (#738, #785)
- New packages:
- Preprocessing transformation for variable aggregation (#533, #617)
- Compute disjunctive variable bounds (#481)
- ParmEst package for parameter estimation (#706, #733, #769, #781)
- PyNumero package for numerical optimization (#725, #775)
- sensitivity_toolbox for interfacing with sIPOPT (#766)
- PETSc AMPL wrapper (#774)
- Testing
- Resolved several build errors on Appveyor (#438, #539, #552, #577, #705)
- Reconfigured Travis CI to run tests using DockerHub images, work on PRs
from forks, run Python 3.7 (#479, #517, #600)
- Jenkins driver updates to fix errors when files are moved/renamed,
delete coverage info from previous builds, decode unicode in
booktests driver, test fixes, new drivers (#627, #629, #630, #631,
#704, #735, #772, #771, #786)
- Documentation and Examples
- Converted old asciidoc documentation to Sphinx (#486, #574)
- Reorganized the Sphinx documentation to make it easier to navigate
and merge old and new documentation sections (#699)
- Create more prominent section for documentation on contrib packages (#729)
- Documentation updates: scripting (#543, #748, #756), pyomo.network
(#651, #745, #780), preprocessing transformations (#653), GAMS writer
(#518), pyomo.kernel (#767), abstract models (#777), general (#782)
- Document PR process (#628)
- Updated README.md to include link for performance plots (#534)
- Update examples (#436)
-------------------------------------------------------------------------------
Pyomo 5.5.1 26 Oct 2018
-------------------------------------------------------------------------------
- General
- Adding support for Python 3.7
-------------------------------------------------------------------------------
Pyomo 5.5 14 Apr 2018
-------------------------------------------------------------------------------
- Move preprocessing transformations to contrib (#426)
- Moves bounds_to_vars and propagate_zero_sum into contrib.preprocessing and
changes aliases to contrib.bounds_to_vars and contrib.propagate_zero_sum.
- Improved external function support
- Fixing AMPLFUNC environment variable management for "derived ASL
solvers (ipopt, conopt, scipampl) (#423)
- Adding support for using the AMPL GSL library (#427)
- PySP updates
- Fixing atypical methods in PySP for generating a scenario tree and
associated instances (#422, #424)
- Adding support in PySP for new persistent solver API (#397)
- Fixing bug in Eckstein-Combettes PySP-PH extension for
handling unused model variables (#396)
- GDP updates
- add support for implicit declaration of multi-constraint Disjuncts (#410)
- switch to using ConfigBlocks for chull, bigm relaxations (#410)
- fix for Big-M with disjuncts containing indexed blocks (#421)
- Fix for discretizing block hierarchical models with
circular references (#406, #353)
- Fix formatting for small numbers in Baron file writer (#405)
- Allow retrieving a mutable Param even when no initial or
default value is specified (#393)
- Python3 fix for Set.pprint
- Make handling of trivially non-binding constraints consistent across
the various solver interfaces (#392)
- Fix to pprint for Params that store non-numeric values
- Removing use of namespace_packages in setup.py
- Modifying transformation that detects trivial constraints to maintain
a list of the constraints that were deactivated (#385)
- Documentation updates (#425)
-------------------------------------------------------------------------------
Pyomo 5.4.3 2 Mar 2018
-------------------------------------------------------------------------------
- Another fix in the release process.
-------------------------------------------------------------------------------
Pyomo 5.4.2 2 Mar 2018
-------------------------------------------------------------------------------
- Misc fix in the release process.
-------------------------------------------------------------------------------
Pyomo 5.4.1 28 Feb 2018
-------------------------------------------------------------------------------
- Misc version increment to support pypi idiosyncrasies.
-------------------------------------------------------------------------------
Pyomo 5.4 28 Feb 2018
-------------------------------------------------------------------------------
=======
- Remove checks for is_indexed from PersistentSolver methods (#366)
- GDP rewrite (#354)
- Updated gdp.chull to handle named expressions (#318)
- Fixed Disjunction to support declaration without expr or rule (#241)
- Misc Gurobi and Cplex fixes (#368)
- Fix to gurobi_direct initialization when gurobipy is not available. (#363)
- Fixes to persistent solvers (#361)
- Fix to cplex 12.6 error management. (#357)
- Fix intermittent "unclonable" component error (#356)
- Fix GAMS interface ignoring `tee` (#351)
- Remove duplicated 'Key' for Expression.display() (#349)
- removing import from GUROBI_RUN.py (#344)
- Add logfile option to GAMS solver (#302)
- Improvements for Gurobi/Cplex Interfaces (#331)
- GDPopt solver initial implementation (#337)
- Fixed to update IndexedVar domain display (#5)
- Reorganize the API documentation (#333)
- Transformation to strip bounds from model (#220)
- Adding transformation to propagate equality-linked fixed variables (#192)
- Fixing Python 3.x compatibility for Sets (#305)
- Fix so that GAMS writer can safely ignore Connector objects (#310)
- Faster solution parsing for CBC (#311)
- Reworked pyomo.contrib and added the pyomo.contrib.example package (#299)
- Fixes for Python 2.6 compatibility in third-party packages
- Adding diagnostic functions for Pyomo models (#217)
- Allow None to be a valid value for Params (#301)
- Improved testing with Travis and Appveyor
- Fixes to Pyro management with PySP solvers
- Transformation of explicit constraints to variable bounds (#190)
- Corrected the settimelimit option with CBC (#265)
- Bug fixes in direct/persistent solver interfaces (#282)
- A major rework of the PySP solver interface
- Added testing for Sphinx code fragments
- Various updates to online documentation generated by Sphinx
- Add error message to model.write if guess_format returns None (#260)
- Ensure that generate_cuid_names descends into Disjunct objects (#176)
- Fix GAMS writer to better support the power function (#263)
- Added persistent interfaces for CPLEX and Gurobi (#262)
- Added additional timing information for model construction and solvers
- Logging overhaul and support for timing concrete models (#245)
-------------------------------------------------------------------------------
Pyomo 5.3 21 Oct 2017
-------------------------------------------------------------------------------
- Removed testing for Python 3.4
- Added exp() to symbolic module (#151)
- Resolved representation error with 1/var (#153)
- Added pyomo.core.kernel (#130)
- Various solver interface fixes: CBC, SCIP, IPOPT, GLPK
- Add docstring to apply function in Transformation (#174)
- Adding a TerminationCondition enum value for "Infeasible or Unbounded" (#171)
- New scripts for performance testing
- Use the has_lb() and has_ub() helper methods for vars and constraints.
- Added documentation tests.
- Updates to DAPS (#200)
- Fix KeyError message in NL writer (#189)
- New ODE/DAE simulator interface for pyomo.DAE (#180)
- Added deprecation decorator (#203)
- New transformation to fix nonnegative variables in equality constraints (#198)
- Deprecated BigM piecewise representations (#216)
- Added GAMS solver interface (#164, #215, #221, #240)
- Updates to testing configuration on Travis and Appveyor
- Tracking changes in pyutilib.th
-------------------------------------------------------------------------------
Pyomo 5.2 14 May 2017
-------------------------------------------------------------------------------
- Resolved timeout issues running NEOS solvers
- Changing the generic ASL solver plugin to use '-AMPL' rather than '-s'
- Fixed loading solutions into sub-blocks (#127)
- Cloning a model now preserves any previous solution(s).
- Fixing pickling of ModelSolutions objects. (#65)
- Allow cloning of blocks even when attributes cannot be deep copied
- Fixed how GUROBI_RUN reports the solve time.
- Added DAPS solver (#139)
- Adding support for Python 3.6. (#103)
- Restricting user defined component names on Blocks to avoid overwriting
important Block methods. (#126)
- Updating pyomo.dae transformations to support Block-derived components.
(#132, #129, #89)
- Fix rare issue where numeric constants in the left- and right-hand sides of a
double inequality expression were incorrectly mapped to an equality
expression even when the values were different.
- Creating an Ipopt solver plugin with additional functionality for sending
options to Ipopt using an options file. Options beginning with 'OF_' will be
interpreted as options that should appear in an options file. A warning is
printed when this will cause an existing 'ipopt.opt' file in the current
working directory to be ignored.
- Make the Ipopt solver plugin more gracefully handle the case when a solution
file is not created by the solver (e.g., when the solver exits because there
are too few degrees of freedom). (#135)
- Reduce time required to import pyomo.environ by delaying checks for
availability of solver interfaces until they are used. (#109)
- Adding support for solving Blocks as if they were Models. (#110, #94)
- Adding support for declaring components on a model by decorating the rule
instead of explicitly invoking the setattr method on the block. This
eliminates the normal pattern of the component name appearing in three
places. (#99)
- Fixes to pyomo.gdp transformations for nested blocks.
- Fixing case in block recursion where descend_into was not being honored.
- Bug fix that impacted non-serial solver managers.
- Make checks for is_indexed() more efficient. (#105)
- Fixes to files for PEP8 compliance.
- Fix to statues set by CPLEX plugin when problem is unbounded.
- Improving Param exception messages.
- Putting a daps release in PySP (#124)
- Updating the bilinear transform to avoid creating a Set `index`.
-------------------------------------------------------------------------------
Pyomo 5.1.1 8 Jan 2017
-------------------------------------------------------------------------------
- Monkeypatch to resolve (#95)
-------------------------------------------------------------------------------
Pyomo 5.1 4 Jan 2017
-------------------------------------------------------------------------------
- Added a CONOPT plugin to handle a custom SOL file output (#88)
- Changed 'pyomo solve' to use any Model object that is found, rather than
requiring the default object to be named 'model' (#80)
- Reworked the solver testing infrastructure to enable enumeration of all
test scenarios, which is used by 'pyomo test-solvers' (#78)
- Fixes for xpress solver options writer (#79)
- Resolved an issue where Pyomo was unnecessarily cloning most inequality
expressions (#80)
- Reworked the Pyomo *.DAT file parser and post-parse processing logic. This
eliminates parse ambiguities that were causing test failures.
- Finalized book test examples for the new edition of the Pyomo book
- Added pyomo.contrib to support integration of third-party Pyomo libraries
in a standard manner
- Fixed TravisCI testing issues where the incorrect version of Python was being
tested
- Fixed error messages in pyomo.dae (#81)
- Revised CBC interface to recognize intermediate non-integer solutions (#77)
- Added checks for IPOPT test failures based on version info (#72)
- Removed support for OpenOpt
-------------------------------------------------------------------------------
Pyomo 5.0.1 16 Nov 2016
-------------------------------------------------------------------------------
- Updating PyUtilib dependency
-------------------------------------------------------------------------------
Pyomo 5.0 15 Nov 2016
-------------------------------------------------------------------------------
- Added examples used in the Pyomo book to the Pyomo software repos
- Added support for automatically generating "template expressions"
- Fix tuple flattening in the case of unhashable SimpleParam in indexes
- Deactivated solver plugins before the are returned from the SolverFactory
- Significantly simplified the polynomial_degree() logic for Pyomo4 expressions
- Updates to expression logic
- Adding a 'feasible' attribute to the TerminationCondition Enum
- Updates to ExternalFunction logic
- Renamed the component name() method to getname() and added a 'name' property
- Fix to allow creating undefined (and uninitialized) mutable params
- Added more careful checks in Set() and Param() to ensure that an abstract set
expression is not evaluated
- Added DAE examples to Pyomo
-------------------------------------------------------------------------------
Pyomo 4.4.1
-------------------------------------------------------------------------------
- Fixing PyUtilib dependency version.
-------------------------------------------------------------------------------
Pyomo 4.4
-------------------------------------------------------------------------------
- Output a warning in benders when the solver interface used to solve the
master problem does not report a solution gap
- Document DAE transformations (#28)
- Allow use of ellipsis in the middle of the indices when slicing
- The Component slicing logic now uses simple slices (`:`) for matching a
single index and the Ellipsis (`...`) for matching zero or more indices.
- Fixing Python 3 compatibility problems in pyomo.dae & dae examples.
- Support evaluating external functions in AMPL-stype shared libraries.
- Renaming "BasicExternalFunction" to "AMPLExternalFunction"
- Allowing Params to be used in setting bounds on a ContinuousSet.
- Use HTTPS with NEOS
- Allow a mutable Parameter that has not been initialized with a value to
be used in the rhs of an equality constraint. (#13)
- Updates to SolverFactor to better support functionality offered by the
'executable' keyword for SystemCallSolver.
- Updates to writers to enforce consistent output ordering in quadratic
expressions.
- Improving the error message for Constraint rules that return None
- Adding PySP solver interface to the SD solver
- Adding an implicit SP representation to PySP that uses annotations
for declaring mutable parameters as stochastic data and providing
a distribution (only tables supported for now).
- Partial fix for infinite recursion reported (#6). This will support
creating scalar (simple) components by passing a set([None]) in
as the index.
- Extending component slicing ability to nested (hierarchical) slices.
-------------------------------------------------------------------------------
Pyomo 4.3 (4.3.11381)
-------------------------------------------------------------------------------
- Removed 'nose' from required packages during installation.
- Fix to be compatible with older versions of 'six'.
-------------------------------------------------------------------------------
Pyomo 4.3 (4.3.11377)
-------------------------------------------------------------------------------
- Restructured PySP tests to hide expected exception output
- Updated pyomo_install to support jython (experimental)
- Fixed a missing reference to 'six'
- More robust management of file I/O in GLPK interface
-------------------------------------------------------------------------------
Pyomo 4.3 (4.3.11345)
-------------------------------------------------------------------------------
- Various fixes to the NEOS solver plugin and to the SOL parser for
certain NEOS solvers.
- Fixed a bug that caused an exception to occur when dynamically adding blocks
to a ConcreteModel.
- Miscellaneous fixes to PySP scripting examples.
-------------------------------------------------------------------------------
Pyomo 4.3 (4.3.11328)
-------------------------------------------------------------------------------
- Misc bug fix
-------------------------------------------------------------------------------
Pyomo 4.3 (4.3.11327)
-------------------------------------------------------------------------------
- Resolved bug in pyomo_install when pyvenv cannot be found.
- Gracefully trap BARON terminations
-------------------------------------------------------------------------------
Pyomo 4.3 (4.3.11323)
-------------------------------------------------------------------------------
- Scripts
- pyomo_install
- Added --pip-options to specify options for PIP option
- Added --index-url to specify the PyPI mirror
- Restructured this script to make it more modular
- Deprecated the --with-extras option