Version 1.5.0

Added

• Added instructions for using the HSL solvers on Windows. #254

Changed

• Dropped support for Python 3.8. #263
• Dropped support for building the package with NumPy < 1.25. #263

What's Changed

• Fixed #249, ensure intermediate_cb returns its value if no exception. by @moorepants in #250
• Add install instructions for HSL on windows by @avdudchenko in #254
• Updated unit tests to call coo_array on 2d arrays not 1d arrays due to change in behavior in SciPy 1.13. by @moorepants in #257
• Remove deprecated oldest-supported-numpy from pyproject.toml. by @moorepants in #263

New Contributors

• @avdudchenko made their first contribution in #254

Full Changelog: v1.4.1...v1.5.0

Version 1.4.1

[1.4.1] - 2024-04-02

Fixed

• Addressed regression in return value of intermediate_cb. #250

Full Changelog: v1.4.0...v1.4.1

Version 1.4.0

[1.4.0] - 2024-04-01

Added

• Support for building with Cython 3. #227, #240
• Exposed the eps kwarg in the SciPy interface. #228
• Added the examples to the source tarball. #242
• Documentation improvements on specifics of Jacobian and Hessian
  inputs. #247
• Support for Python 3.12.

Fixed

• Ensure tol is always a float in the SciPy interface. #236
• print_level allows integers other than 0 or 1. #244

What's Changed

• TST: minimize_ipopt: add back test_gh1758 by @mdhaber in #229
• Enable support for cython 3 by @chrhansk in #227
• ENH: expose 'eps' option for finite difference step size by @mdhaber in #228
• Fully allow Cython 3. by @moorepants in #240
• Covert tol to float before passing to ipopt. by @moorepants in #236
• Add examples/ and docs/requirements.txt to source distribution by @musicinmybrain in #242
• Fix #234 by @MarkusZimmerDLR in #244
• Error message spelling indicates incorrect callback name by @lynntf in #246
• Add clarity to jacobian/hessianstructure methods by @lynntf in #247
• Version 1.4.0 by @moorepants in #248

New Contributors

• @MarkusZimmerDLR made their first contribution in #244
• @lynntf made their first contribution in #246

Full Changelog: v1.3.0...v1.4.0

Version 1.3.0

[1.3.0] - 2023-09-23

Added

• Added a pyproject.toml file with build dependencies. #162
• Added support for sparse Jacobians in the SciPy interface. #170
• Added get_current_iterate and get_current_violations methods to
  Problem class. #182
• Added installation instructions for Ubuntu 22.04 LTS apt
  dependencies.
• Added a script to build manylinux wheels. #189
• Improved documentation of minimize_ipopt(). #194
• Added support for all SciPy minimize() methods. #200
• Added support for SciPy style bounds in minimize_ipopt() and added
  input validation. #207
• Added new CyIpoptEvaluationError and included it in relevance
  callbacks. #215
• Added dimension checks for Jacobian and Hessian attributes/methods.
  #216

Fixed

• Fixed import of MemoizeJac from scipy.optimize. #183
• args and kwargs can be passed to all functions used in
  minimize_ipopt(). #197
• Fixed late binding bug in minimize_ipopt() when defining
  constraint Jacobians. #208
• Pinned build dependency Cython to < 3. #212 #214 #223
• Fixed installation on Windows for official Ipopt binaries adjacent
  to setup.py. #220

Changed

• Changed the license to Eclipse Public 2.0. #185
• Updated all dependency pins to match those in Ubuntu 22.04 LTS. #223

What's Changed

• Version 1.2.0 by @moorepants in #159
• Reduce manual pre-installation requirements via pyproject.toml by @nrontsis in #162
• Remove appveyor (and old badges). Fixes #113. by @moorepants in #168
• Add support for sparse jacobians in the scipy-interface by @jhelgert in #170
• Change conda-build-version to mamba-version by @brocksam in #178
• Added Ubuntu 22.04 install instructions, fixes #166. by @moorepants in #184
• Import MemoizeJac from scipy.optimize._optimize. by @moorepants in #183
• Update license to EPL 2.0, fixes #165. by @moorepants in #185
• Change CI to use mambaforge. by @moorepants in #186
• Use oldest-supported-numpy in pyproject.toml by @nrontsis in #188
• Don’t use deprecated/removed np.float alias by @musicinmybrain in #191
• Script for building manylinux wheels by @nrontsis in #189
• DOC: minimize_ipopt: add documentation by @mdhaber in #194
• args and kwargs now work fully for minimize_ipopt by @moorepants in #197
• Remove test.yml, fixes #187. by @moorepants in #199
• Add get_current_iterate and get_current_violations methods to Problem class by @Robbybp in #182
• MAINT: minimize_cyipopt: add input validation by @mdhaber in #206
• MAINT: minimize_ipopt: fix late binding bug when defining constraint Jacobians by @mdhaber in #208
• ENH: minimize_cyipopt: support SciPy methods by @mdhaber in #200
• Pin Cython<3 until compatibility can be fixed by @musicinmybrain in #212
• pin cython < 3 by @plakrisenko in #214
• Add CyIpoptEvaluationError and handle in callbacks by @Robbybp in #215
• Now picks up Windows Ipopt binary files that are adjacent to setup.py (restores regression) by @moorepants in #220
• ENH: minimize_ipopt: add input validation for bounds and support for new-style constraints by @mdhaber in #207
• Add sanity checks to Jacobian / Hessian indices by @chrhansk in #216
• Update the depedency pins to thos available in Ubuntu 22.04 LTS by @moorepants in #223
• Version 1.3.0 by @moorepants in #224

New Contributors

• @nrontsis made their first contribution in #162
• @mdhaber made their first contribution in #194
• @Robbybp made their first contribution in #182
• @plakrisenko made their first contribution in #214
• @chrhansk made their first contribution in #216

Full Changelog: v1.2.0...v1.3.0

Version 1.2.0

[1.2.0] - 2022-11-28

Added

• Added instructions for using the HSL binaries with the Conda Forge binaries.
• Support for Python 3.10 and 3.11.

Fixed

• Improved the type information in the JAX example.
• SciPy MemoizeJac deprecation warning handled.
• Handled KeyErrors upon unknown IPOPT return statuses.
• Removed unnecessary shebangs.
• Improved the Github Actions CI.

Removed

• Dropped support for Python 3.6.

What's Changed

• Version 1.1.0 by @moorepants in #129
• Avoid KeyError upon unknown IPOPT return statuses. by @tobias-kies-artemis in #134
• Fix a couple of small documentation typos by @musicinmybrain in #137
• Improve GitHub Actions by @brocksam in #139
• A little consistency in shebangs and execute bits by @musicinmybrain in #136
• Added instructions about using HSL with conda forge binaries to the documentation. by @moorepants in #138
• Remove deprecated setup.py install approach by @brocksam in #149
• Improve the jax example by @jhelgert in #146
• Avoid SciPy deprecation warning. by @moorepants in #157

New Contributors

• @tobias-kies-artemis made their first contribution in #134

Full Changelog: v1.1.0...v1.2.0

Version 1.1.0

[1.1.0] - 2021-09-07

Added

• Added support for objective and constraint Hessians and jac=True option
  for constraints in the scipy interface.
• Example added showing how to use JAX for calculating derivatives.

Changed

• Releases have been moved to the PyPi cyipopt distribution namespace:
  https://pypi.org/project/cyipopt/. Users should now install with pip install cyipopt. Be sure to uninstall the ipopt distribution first.

Removed

• The six and future dependencies are removed.

What's Changed

• Remove six and future by @moorepants in #112
• Added example using JAX and the scipy interface. by @jhelgert in #119
• Adds configuration to use github actions for testing. by @moorepants in #123
• Add support for objective and constraint hessians and jac=True option for constraints in the scipy interface by @jhelgert in #121
• Refactor objective, gradient and evaluate_fun_with_grad methods by @jhelgert in #128

Full Changelog: v1.0.3...v1.1.0

Version 1.0.3

[1.0.3] - 2021-04-07

Changed

• Changed PyPi distribution name back to ipopt, as cyipopt is
  currently unavailable.

[1.0.2] - 2021-04-06

Changed

• Corrected the CHANGELOG.

[1.0.1] - 2021-04-06

Changed

• Corrected the PyPi classifier.

[1.0.0] - 2021-04-06

Added

• conda/cyipopt-dev.yml conda environment file for development.
• minimize_ipopt approximates the Jacobian of the objective and the
  constraints using SciPy's approx_fprime if not provided
  [#91].
• Make changes as outlined in Version 1.0 proposal
  [#14].
• requirements.txt file.
• Dedicated tests using pytest in cyipopt/tests/ directory.
• examples/ directory.
• Support for Python 3.9.
• Minimum version requirements for all dependencies.

Changed

• Installation and development documentation moved from README.rst
  to docs/.
• Python logger changed to use the cyipopt namespace
  [#102].
• Class and method names now use PEP8 standards. Old class and method
  names now result in a deprecation warning.
• Module directory renamed from ipopt. to cyipopt.
• doc/ folder renamed to docs/.
• Updated CHANGELOG.rst.

Deprecated

• Package being imported by import ipopt (replaced by
  import cyipopt).
• Use of non-PEP8 named classes/function/methods, e.g.
  cyipopt.problem (replaced by cyipopt.Problem),
  cyipopt.problem.addOption (replaced by
  cyipopt.Problem.add_option), cyipopt.problem.setProblemScaling
  (replaced by cyipopt.Problem.set_problem_scaling) etc.

Removed

• test/ folder containing examples, which have mostly been moved to
  examples/
• docker/, vagrant/ and Makefile
  [#83].
• Support for Python 2.7.
• Support for Python 3.5.

Full Changelog: v1.0.2...v1.0.3

Version 0.3.0

• Added support for Conda Forge Windows Ipopt >=3.13 binaries using the
  IPOPTWINDIR="USECONDAFORGEIPOPT" environment variable value.
  (#78)
• Added support for Ipopt >=3.13 on Windows.
  (#63)

What's Changed

• Release 0.2.0 by @moorepants in #65
• Remove travis limit on ipopt. by @moorepants in #67
• Add Ipopt 3.13 support for Windows by @apommel in #63
• Try using Conda-Forge's IPOPT Windows build. by @moorepants in #78

Full Changelog: v0.2.0...v0.3.0

Version 0.2.0

• Resolved compatibility issues with Windows.
  (#49)
• OSError now raised if pkg-config can't find ipopt on installation.
  (#57)
• Supporting only Python 2.7 and 3.6-3.8. Python 3.5 support dropped.
  (#58)
• Improvements to the README and setup.py for Windows installations.
  (#54)
• Drop Python 3.4 support and add Python 3.7 support.
  (#51)
• Adding installation testing on the Appveyor CI service.
  (#50)
• Added custom installation instructions for Ubuntu 18.04.

What's Changed

• Update PR #42 by @moorepants in #43
• Resolve compatibility issues with windows by @apommel in #49
• Add an appveyor Windows CI build. by @moorepants in #50
• Drop Python 3.4 support and add 3.7. by @moorepants in #51
• Add some more details on Windows installation by @avikde in #54
• Switch to new miniconda urls. by @moorepants in #56
• Drop Python 3.5 and add Python 3.8 in CI tests. by @moorepants in #58
• Added OSError to handle pkg-config not finding ipopt. by @moorepants in #57

New Contributors

• @avikde made their first contribution in #54

Full Changelog: v0.1.9...v0.2.0

Version 0.1.9

• Fixed encoding issue preventing installation on some OSes.
• Removed SciPy requirements from examples.