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CHANGELOG.txt
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===============
Pyomo CHANGELOG
===============
-------------------------------------------------------------------------------
Pyomo 6.4.2 17 Aug 2022
-------------------------------------------------------------------------------
- General
- Resolve dill incompatibility with attempt_import (#2419)
- Speed up book tests and improve import/logging infrastructure (#2449)
- Make typing overloads available at runtime (#2471)
- Update list of known TPLs to reflect Python 3.10 (#2478)
- Add NL writer version 2 but don't activate by default (#2473)
- Add deprecation.relocated_module utility (#2492)
- Core
- Support cython functions through Initializer (#2421)
- Ensure UnindexedComponent_set is correctly pickled/restored (#2416)
- Update as_numeric() to raise an exception on non-is_numeric_type() Pyomo
objects (#2444)
- replace_expressions: support replacing variables with constants (#2410)
- Update component_data_objects and component_data_iterindex to not
return duplicate data (#2456)
- Fix exception handling logic bug in quicksum (#2458)
- Reduce recursion in model clone/deepcopy (#2487)
- Resolve exception cloning empty LinearExpression objects (#2489)
- Resolve errors from inplace operators on Expression objects (#2493)
- Documentation
- Fix typos and incorrect link (#2420, #2482)
- Fix Sphinx warnings in documentation builds (#2434)
- Solver Interfaces
- Add support for SCIP 8.0 (#2409)
- Add explicit space to GAMS put statements to support GAMS 39+ (#2450)
- Catch exceptions in BARON interface when parsing objective bounds (#2467)
- Testing
- Skip SCIP 8.0 tests on PyPy (#2424)
- Force conda to use conda-forge channel in GHA (#2430)
- Fix GHA win/3.10 Python version inconsistency (#2433)
- Enable Pyomo.DAE Simulator tests on PyPy (#2443)
- Abort the Jenkins build if virtualenv creation fails (#2451)
- Remove scipy from GHA PyPy builds (#2474)
- Move performance testing driver scripts to scripts/performance (#2476)
- Improve common.timing test robustness (#2490)
- Contributed Packages
- APPSI: Improve error message in nl writer when all variables fixed (#2407)
- APPSI: Fix bug in Gurobi interface when modifying the objective (#2454)
- APPSI: Solve blocks that use variables that are not on the block (#2453)
- APPSI: Method to release Gurobi license from persistent interface (#2480)
- community_detection: Trap exceptions from networkx (#2415)
- FBBT: Add tolerances to tests (#2445)
- GDPopt: Refactor to improve extensibility and maintainability (#2406)
- incidence_analysis: Add method for weakly connected components (#2418)
- MindtPy: Fix bug in copying variable values between models (#2432)
- MindtPy: Add support for appsi_cplex and appsi_gurobi (#2373)
- Parmest: Add utils submodule and support to convert Params to Vars (#2352)
- Parmest: Fix use of relocated_module_attribute (#2472)
- PyROS: Fixes to ellipsoidal sets (#2425)
- PyROS: Account for variable domains (#2426)
- PyROS: Fix objective validation (#2371)
- PyROS: Avoid master feasibility problem unit consistency checks (#2459)
- PyROS: Fix discrete uncertainty set separation (#2469)
- PyROS: Update exception handling parsing BARON lower/upper bounds (#2486)
-------------------------------------------------------------------------------
Pyomo 6.4.1 13 May 2022
-------------------------------------------------------------------------------
- General
- Extend linux distribution map logic (#2361)
- Improve string processing in ConfigList, ConfigDict, and ListOf (#2360)
- Update copyright assertion (#2368, #2378)
- Deprecate name_buffer argument to getname (#2370)
- Defer construction of the main Pyomo parser (#2385)
- Improve error checking parsing ConfigDict string value (#2399)
- Core
- Add indices to ComponentData objects (#2351)
- Ignore SetOf, BuildAction, and BuildCheck when checking units (#2366)
- Improve support for absolute value in differentiation and FBBT (#2347)
- Allow relative tolerance when comparing unit dimensionality (#2395)
- Solver Interfaces
- Fix bug in GLPK solver plugin (#2348)
- Update BARON solution parser (#2367)
- Testing
- Turn on failure for codecov-action (#2343)
- Fixes to GHA due to updates to Ubuntu runner and Conda (#2356, #2384, #2396)
- Update setup-python and pypy in GHA (#2364)
- Pin version of openmpi used for testing (#2369)
- DAE Updates
- Fix typo preventing a DAE test from running (#2349)
- Contributed Packages
- APPSI: Minor improvements and generalizations (#2383, #2386, #2389,
#2391, #2388, #2392)
- incidence_analysis: Add option to ignore inequality constraints in
IncidenceGraphInterface (#2350)
- MC++: Update interface tests (#2400)
- MindtPy: Add quadratic_strategy option to pass quadratic constraints
or objectives to MIP solvers (#2338)
- Parmest: Skip tests when seaborn and matplotlib are missing (#2394)
- PyROS: Improve feasibility problem formulation, objective validation
(#2353, #2371)
-------------------------------------------------------------------------------
Pyomo 6.4.0 16 Mar 2022
-------------------------------------------------------------------------------
- General
- Distribute the ampl_function_demo C source / cmake files (#2319)
- Add GitHub URL to setup.py for PyPI (#2325)
- Use constant indentation for long lines in the HierarchicalTimer (#2336)
- Core
- Remove incomplete pyomo/core/base/alias.py module (#2284)
- Remove Python 3.6 support (#2312)
- Solver Interfaces
- Remove PICO solver interface (#2341)
- Testing
- Add Windows pip single test (#2334)
- Fix test docstrings in piecewise to silence warnings (#2342)
- Contributed Packages
- APPSI: Update Gurobi solver unavailable message (#2320)
- APPSI: Remove distributables for Windows (#2326)
- APPSI: Fix bugs when working with the Gurobi solution pool (#2335)
- APPSI: Fix bug in persistent update for FBBT (#2340)
- Preprocessing: Stop using polynomial_degree to check for linear and
constant expressions (#2324)
- PyNumero: Improve coverage of mpi block matrix tests (#2318)
- PyNumero: Skip bound/domain validation in ExternalPyomoModel (#2323)
- PyNumero: Remove deprecated useage of numpy.bool (#2339)
- PyROS: Fix variable default initialization (#2331)
-------------------------------------------------------------------------------
Pyomo 6.3.0 23 Feb 2022
-------------------------------------------------------------------------------
ADVANCE CHANGE NOTICE
- This will be the last release to support Python 3.6.
- General
- Construct slices with normalized indices in slicing utility (#2223)
- Remove hard-coded project name from default attempt_import() message (#2237)
- Add --with-distributable-extensions option to setup.py (#2260)
- Update Pyomo versioning to always include the micro version number (#2265)
- Remove optional_packages from pyomo.environ (#2195)
- Add Python 3.10 as an officially-supported interpreter (#2302)
- `TempfileManager` updates (deletion order, add context) (#2297)
- Add `report_scaling` utility to detect potential scaling issues (#2252)
- Core
- Check Var bounds when setting values (#2196)
- Fix bug in implicit Var construction (#2210)
- Add support for user-defined Component List starting index (#2215)
- Switch Var.value setter to validate values (#2214)
- Overload component initializers with named keyword params (#2212, #2230)
- Resolve errors when creating Reference to a scalar Set (#2229)
- Standardize scalar-valued external function interfaces (#2231)
- Resolve bugs in cloning _ImplicitAny domains (#2233)
- Redesign Var.stale handling to use a global state flag (#2249)
- Update differentiate() to accept string mode identifiers (#2266)
- Add `as_quantity`: evaluate a Pyomo expression to a pint `Quantity` (#2222)
- NPV_SumExpression to inherit from NPV_Mixin (#2209)
- Add support for `abs` in numeric differentiation (#2232)
- Search filesystem for AMPLExternalFunction library (#2305)
- Documentation
- Updates to installation documentation (#2259)
- Update GDP references (#2300)
- Add example AMPL external function library (#2295)
- Solver Interfaces
- Disable log file in gurobi_direct when keepfiles=False (#2203)
- Remove old GLPK interfaces (#2256)
- Support gurobi lp interface through gurobipy module (#2262)
- Update CBC version identification (#2250)
- Increase CBC timeout when getting version/asl compatibility (#2293)
- Deprecate the `Alias` component (#2288)
- Remove XPRESS interface (#2273)
- Support string arguments in NL external functions (#2295)
- Fix reversed NL operator codes for floor/ceil (#2216)
- Testing
- Skip some fileutils tests on OSX Big Sur and Python<3.8 (#2224)
- Fix Windows/Python 3.6 testing dependency (#2234)
- Update test suite for BARON 22.1.19 (#2268)
- Rework coverage uploads to use GitHub Actions (#2225)
- Add option to test driver for turning off log capture (#2198)
- Relaxing timing target for Windows GHA (#2303)
- Resolve GDP test failure for missing solvers (#2306)
- Testing infrastructure Refactor: `nosetests` to `pytest` (#2298)
- Make time limit more robust for APPSI (#2296)
- Resolve failing floating-point comparison failures in FBBT (#2244)
- Check gurobipy availability in doctests (#2253)
- GDP Updates
- Ensure gdp.fix_disjuncts always creates a fully algebraic model (#2263)
- Add `partition_disjuncts` and `between_steps` transformations (#2221)
- Contributed Packages
- APPSI: Fix bug with CBC options (#2243)
- APPSI: Correctly identify changes to constraints (#2299)
- APPSI: Improvements to persistent interface (#2246)
- APPSI: Implement FBBT in C++ module (#2248)
- APPSI: Resolve build errors on Windows (#2309)
- GDPopt: Fix bugs in preprocessing (#2211)
- GDPopt: Switch preprocessing to use FBBT (#2264)
- incidence_analysis: General improvements (#2239, #2240)
- MindtPy: Update online docs and logging (#2219, #2207)
- MindtPy: Add Primal/Dual Integral (#2285)
- MindtPy: Nonlinear sum reformulation of objective of MINLP (#2276)
- Parmest: Covariance matrix (#2287), Add examples (#2274)
- PyNumero: Add scaling factor support to ExternalPyomoModel (#2269)
- PyNumero: Use projected NLPs for ExternalPyomoModel inner problems (#2283)
- PyNumero: Add SQP example (#2291)
- PyROS: Support ConstraintList and range constraints (#2206)
- PyROS: Add optional bypassing of global separation subproblems (#2254)
- TrustRegion: New implementation of Trust Region Framework (#2238, #2279)
-------------------------------------------------------------------------------
Pyomo 6.2 17 Nov 2021
-------------------------------------------------------------------------------
- General
- Add ListOf domain validator for ConfigValue (#2103)
- Remove deprecated calls to warnings.warning (#2106)
- Add Bool and Integer domain validators (#2110)
- Overhaul of Pyomo TempfileManager (#2109)
- Allow passing tuples and expressions to
calculate_variable_from_constraint() (#2133)
- Add external functions to block in create_subsystem_block (#2142)
- Track changes in pint 0.18 and Xpress 8.13.0 (#2168)
- Remove code deprecated in Pyomo version 5.6 or older (#1992)
- Add Linux aarch64 wheel build support (#2076)
- Update wheel creation GitHub Actions version (#2192)
- Remove optional_packages from pyomo.environ (#2195)
- Ignore bounds/domain when updating variable value in
calculate_variable_from_constraint() (#2177)
- Core
- Fix Expression.getitem when initialized with Skip (#2136)
- Support hierarchical models in logical_to_linear transformation (#2135)
- Add ordered=True API for iterating over IndexedComponents (#2149)
- Fix bug in differentiate module related to reused subexpressions (#2148)
- Rework expression replacement and LinearExpression object (#2143)
- Add support for custom pint registries (#2153)
- Add support for solving blocks and targets in logical_to_linear
transformation (#2147)
- Add support for finding components with a ComponentUID (#2178)
- Fix bugs with open NumericRanges (#2170, #2179)
- Fix bugs with References (#2158)
- Fix Initializer by treating pandas.Series as sequences (#2151)
- Fix Initializer support for ConfigList/ConfigDict (#2200)
- Add a DataFrameInitializer (#2150)
- Add a public API for retrieving variable bound expressions (#2172)
- Rework Var component to leverage Initializer (#2184)
- Documentation
- Expand documentation of pyomo.common (#2104)
- Minor documentation fixes (#2117)
- Solver Interfaces
- Issue warning when using the Xpress LP/MPS interface (#2125)
- Disable implicit repn cache for LP and NL writers (#2144)
- Add option to force variables into an NL file (#2152)
- Add the exception to the NEOS connection failure warning message (#2166)
- Improve GAMS writer performance (#2191)
- Testing
- Resolve test failures when no solvers are available (#2146)
- Resolve NumericValue support in assertStructuredAlmostEqual (#2200)
- Fix typo in booktest skip declaration (#2186)
- DAE Updates
- Utility function to slice individual components in flatten module (#2141)
- Fix errors and deprecation warnings in some DAE examples (#2189)
- Fix bug allowing numpy.float64 types to end up in a ContinuousSet (#2193)
- GDP Updates
- Update GDP transformations to handle logical constraints (#2175)
- Contributed Packages
- APPSI: Add support for external functions in NL writer (#2111)
- APPSI: Improved handling of immutable parameters (#2112)
- PyNumero: Pass AMPLFUNC directly to pynumero_ASL and not through
environment (#2114, #2129)
- PyNumero: ExternalPyomoModel performance improvements (#2155)
- PyNumero: Remove exception when variable bounds are equal (#2121)
- Parmest: Add support for indexed variables (#2108)
- incidence_analysis: Simplify extraction of diagonal blocks from a block
triangularization (#2128)
- GDPopt: Make line endings PEP8 compliant (#2173)
- MindtPy: Add support for MIP solver solution pools (#2164)
- MindtPy: Skip specific tests due to failure with Gurobi 9.5.0 on
Windows (#2183)
- MindtPy: Fix feasibility pump and fixed variable detection (#2185, #2187)
- PyROS: Add uncertain variable bounds detection (#2159)
-------------------------------------------------------------------------------
Pyomo 6.1.2 20 Aug 2021
-------------------------------------------------------------------------------
- General
- Add test for missing/extra __init__.py files (#2090)
- Update deprecation warnings to only be emitted once per context (#2095)
- Core
- Replace Set.card() with Set.at() (#2096)
- DAE
- Remove use of OrderedSet.__getitem__ from contset.py (#2091)
- Contributed Packages
- APPSI: Build/install APPSI extension outside of source tree (#2092)
- MindtPy: Support gurobi_persistent in LP/NLP-based B&B algorithm (#2071)
-------------------------------------------------------------------------------
Pyomo 6.1.1 17 Aug 2021
-------------------------------------------------------------------------------
- General
- Adding missing __init__.py files across Pyomo (#2086)
-------------------------------------------------------------------------------
Pyomo 6.1 17 Aug 2021
-------------------------------------------------------------------------------
- General
- Support using TicTocTimer as a context manager (#2012)
- Add optional dependency target in setup.py (#2017)
- Added utilities for subsets of model components (#1998)
- Improvements in deprecation warning system (#2045, #2058, #2056)
- Resolve TeeStream deadlock issues (#2072)
- Move PYOMO_CONFIG_DIR into pyomo.common.envvar (#2065)
- Add a DynamicImplicitDomain domain validator (#2043)
- Generate standard repn misidentifies nonlinear expr (#2074)
- Add Module() validator to the config system (#2062)
- Core
- Yield Iterator from IndexedComponent (#2007)
- Use yield from in pyomo.core (#1984)
- Improvements to sorted_robust and string formatting (#2020, #2024)
- Integrating numpy with the Pyomo expression system (#2027, #2034, #2070)
- Resolve Set bugs (#2048)
- Prevent attaching global Sets to Blocks (#2042)
- Correct scalar mutable param getitem implementation (#2066)
- Fix Var bounds with unitted mutable Params (#2067)
- Improve @disable_methods decorator (#2069)
- Allow native numeric types in relational expressions (#2073)
- Fixing symbol names in Initializer deprecation layer (#2079)
- Deprecate OrderedSet.__getitem__ in favor of OrderedSet.card() (#2053)
- Documentation
- Create a list of related packages (#2016)
- Solver Interfaces
- Clean up dependencies and solver.available() IO (#2011)
- Update Baron writer to recognize priority Suffix (#2035)
- Add OCTERACT to the list of known NEOS solvers (#2064)
- Resolve tee issues with Xpress 8.9+ (#2059)
- Increase timeout for ASL version request (#2083)
- Testing
- Miscellaneous testing fixes (#2023)
- Improve management of tempfiles in tests (#2036)
- Update GHA to ubuntu-latest; resolve ampl/mp build error (#2015)
- Move constrained_layout tests to 'expensive' suite (#2018)
- Update xpress, appsi tests to manage CWD (#2031)
- Improve comparison of Book examples to baselines (#2044)
- Add retry/timeout to powershell downloads (#2077)
- GDP Updates
- gdp.hull: Only create one disaggregated variable for all Disjuncts in
which a Var does not appear (#2005)
- Contributed Packages
- FBBT: descend_into option for FBBT (#2025)
- FBBT: Interval arithmetic edge cases for FBBT (#2026)
- FBBT: Improved handling for product expressions (#2038)
- incidence_analysis: methods for generating and solving strongly
connected components of a square model (#2009)
- incidence_analysis: Add Dulmage-Mendelsohn partition (#2063)
- PETSc: Remove PETSc solver (#1986)
- PyROS: Pyomo Robust Optimization Solver (#2006, #2061)
- sensitivity_toolbox: Add kaug dsdp mode (#1613)
- APPSI: API Cleanup (#1944), bug-fix in update_variables (#2051)
- MindtPy: Increase code coverage (#2021)
- MindtPy: Replace is not by != (#2081)
- PyNumero: ExternalGreyBox subclass to embed implicit functions (#2022)
-------------------------------------------------------------------------------
Pyomo 6.0.1 4 Jun 2021
-------------------------------------------------------------------------------
- General
- Catch non-standard file.write() implementations (#1999)
- Testing
- Fix miscellaneous tests caught by peripheral test suites (#1991)
- GDP Updates
- Switch bigm's M value calculation to always use fbbt (#2000)
- Contributed Packages
- FBBT: Add support for LinearExpression (#1994)
- PyNumero: Improve management of stdout in cyipopt solver (#2001)
- GDPopt: Fix implicit conversion warnings (#2002)
-------------------------------------------------------------------------------
Pyomo 6.0 20 May 2021
-------------------------------------------------------------------------------
BACKWARDS COMPATIBILITY WARNINGS
- Moved PySP into a separate package available at
https://github.com/Pyomo/pysp
- Renamed "Simple" components to "Scalar" components
- Removed support for implicit ranged inequalities
- Removed support for component reconstruct method
- Removed support for casting relational expressions to bool
- Removed support for Python 2.7, 3.5, and pypy2
- Drop PyUtilib Dependency
- Replace pyutilib.misc.import_file with pyomo.common.fileutils (#1815)
- Replace pyutilib.math with Python math package (#1809)
- Remove or replaced pyutilib.misc items (#1814, #1822)
- Replace pyutilib.subprocess with Python subprocess (#1812)
- Replace pyutilib.th with unittest and pyomo.common.unittest (#1859, #1898)
- Remove pyutilib.pyro (#1869)
- Remove pyutilib dependencies from Pyomo script (#1976)
- Remove hard pyutilib dependency (#1980)
- General
- Drop support and testing for Python 2.7, 3.5, and pypy2 (#1763, #1818)
- Remove PySP (#1819)
- Clean up code for Python 2/3 cross-compatibility, remove use of six
(#1829, #1833, #1901, #1908, #1910, #1911, #1876, #1915, #1919,
#1931, #1938, #1937)
- Standardize usage of string type comparison (#1826)
- Switch default branch of Pyomo from master to main (#1843)
- Cleanup console scripts (#1830)
- Update import_file to recognize module context (#1871)
- Remove 2nd edition Pyomo Book examples (#1883)
- Move Container/Options/Bunch into just Bunch (#1838)
- Improve handling of enum.Enum domains in ConfigValue (#1893)
- Add MANIFEST.in file to include cpp files in PyPI package (#1851)
- Add GitHub issue templates for bug reports and feature requests (#1920)
- Fix identification of Pyomo root dir in unittest.runtests (#1922)
- Update the Config system (#1916)
- Resolve numerous deprecation warnings (#1935)
- Timing and timing test improvements (#1939, #1894, #1945)
- Overhaul @deprecated decorator to work better with class, enum, and
sphinx (#1906)
- Improve attempt_import mechanism (#1940, #1948)
- Stop caching the picklability of function types (#1959)
- Support explicit constants in ExternalFunction arguments (#1967)
- Add RenameClass metaclass (#1973)
- Add 3rd edition Pyomo Book examples and tests (#1914)
- Promote assertStructuredAlmostEqual to a module function (#1979)
- Core
- Improve sorted_robust for (nested) tuple items (#1842)
- Update _component_data_iter to use sorted_robust (#1852)
- Disable implicit ranged inequalities (#1840)
- Improve error message when constructing a RangeSet with external
data (#1875)
- Fix bug in scaling transformation (#1854)
- Fix bug in identify_mutable_parameters (#1878)
- Fix inequality function to work with floats (#1841)
- Update test_model to skip tests if GLPK is not available (#1917)
- Rename param._NotValid to param.Param.NoValue (#1927)
- Improve error message for disabled methods on Abstract components (#1896)
- Propagate exception flag to _EvaluationVisitor (#1946)
- Define pprint() for ExternalFunction components (#1965)
- Support setting Var and Param values with unit expressions (#1966)
- Allow assigning None to a unitted variable (#1977)
- Update to only allow constant expressions to be cast to bool (#1954)
- Rename "Simple" components to "Scalar" components (#1971)
- Add utility for comparing expressions (#1981)
- Improve quoting in component names and indices (#1982, #1985)
- Remove component.reconstruct() (#1983)
- Documentation
- Add documentation and doctests for pyomo.common.timing (#1924)
- Update the ReadTheDocs configuration (#1929)
- Improve robustness of doctest tests (#1942)
- Solver Interfaces
- Track changes in NEOS/RAPOSa expected behavior (#1816)
- Fix quadratic term handling for QCQO problems in mosek_direct (#1835)
- Remove pyomo.opt.blackbox and the COLIN solver interface (#1872)
- Add support for SHOT solver to GAMS interface (#1889)
- Fix sign convention in CBC for maximization problems (#1848)
- Update gurobi available() checks (#1921)
- Update CBC interface to handle infinite gap (#1907)
- Preserve CWD when xpress import fails (#1958)
- Update baron interface to prevent infinite loop when no solution is
found (#1963)
- Remove pyomo.solvers.tests.core (#1897)
- Testing
- Clean up Jenkins test driver (#1813)
- Update unittest.timeout to work on Windows (#1825)
- Manually add commit HASH to codecov upload on GitHub Actions (#1824)
- Relax tee/timeout test timing to improve robustness (#1831)
- Update Mosek tests (#1844)
- Add Casadi to GitHub Actions test environment (#1849)
- Disable codecov uploads from forks (#1863)
- Update IDAES-ext version used in our GitHub Actions jobs workflows (#1882)
- Rewrite test driver script (#1870, #1902)
- Rebuild GitHub Actions caches (#1934)
- Update expected CBC test failures (#1943)
- Update merged reader test to reduce failures in OSX (#1953)
- Add non-fatal timeout for nightly NEOS test (#1964)
- Do not download/build extensions for slim builds (#1988)
- DAE Updates
- Split get_index_set_except into two functions (#1879)
- GDP Updates
- Fix multiple References to local variables in nested disjuncts (#1968)
- Fix GDP error when using a disjunction with nested disjunctions as a
target (#1969)
- Convert Disjunct.indicator_var from binary to boolean variable (#1960)
- Network Updates
- Fix bug in cloning Ports (#1899)
- Updates to improve interoperability with pyomo.gdp (#1961)
- Contributed Packages
- PyNumero: add Hessian support for grey box models, support multiple
grey box models in a single Pyomo model, add callback functionality
to cyipopt interface, track changes in cyipopt API, expose nl file
options in PyomoNLP, add documentation and doctests (#1810, #1832,
#1873, #1913, #1930, #1936)
- Update contrib.viewer tests (#1820)
- Add new Auto-Persistent Pyomo Solver Interfaces (APPSI) package (#1793)
- GDPopt: add option to solve a relaxation with integer cuts, remove default
strategy (#1837)
- Benders: rename master problem to root problem (#1828)
- FBBT: Improve interval arithmetic for some special cases (#1949)
- Parmest: remove dependency on PySP and add interface to mpi-sppy (#1778)
- Add new incidence_analysis package for maximum matching and block
triangularization (#1888)
- MindtPy: general improvements and add feasibility pump (#1847)
-------------------------------------------------------------------------------
Pyomo 5.7.3 29 Jan 2021
-------------------------------------------------------------------------------
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
- Improve GHA workflow for uploading manylinux wheels (#1758, #1757)
- Add Python 3.9 to OSX/Windows on the GHA release workflow (#1755)
- Standardize file line endings (#1764)
- Resolve matplotlib deferred import failure (#1770)
- Move the ATTIC directory to an internal archived repository (#1762)
- Rename log_active_constraints to log_model_constraints (#1788)
- Remove references to ordereddict package (#1796)
- Convert old deprecation messages to use pyomo.common.deprecation (#1798)
- Update and standardize Pyomo logging configuration (#1797)
- Add writer consistency checks between filenames and formats (#1804)
- Initialize self.tempdir in TempfileManagerClass (#1806)
- Core
- Add is_reference API (#1740)
- Add option to not rename components in the scaling transformation (#1596)
- Improve units documentation and performance (#1769, #1794, #1805)
- Documentation
- Move the doc/attic directory to an internal archived repository (#1773)
- Solver Interfaces
- Fix missing imports in the persistent solver interface (#1772)
- Update NEOS interface to provide email addresses (#1782, #1783, #1795)
- Add mipgap capture to CPLEX direct interface (#1775)
- Update solver license_is_valid checks (#1789)
- Update CPLEX solution parser for CPLEX 12.10 (#1792)
- Resolve issues with the NEOS interface (#1802)
- DAE Updates
- Extend flattener to allow multiple sets (#1768)
- GDP Updates
- Fix subproblem initialiations in gdp.cuttingplane (#1780)
- Testing
- Fix Jenkins test script (#1771)
- Fix GHA tests to work with PyMySQL 1.0.0 (#1777)
- Contributed Packages
- PyNumero: resolve portability issue with Cyipopt exception handling,
add PyomoNLP methods for accessing equality/inequality constraints (#1781,
#1791)
- Parmest: update pairwise plot to use the covariance matrix (#1774)
-------------------------------------------------------------------------------
Pyomo 5.7.2 17 Dec 2020
-------------------------------------------------------------------------------
- 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)