ropt-nomad 0.1.0

A NOMAD backend for the ropt robust optimization packages

A NOMAD optimizer plugin for ropt

This package installs a plugin for the ropt ensemble optimizer package, giving access to algorithms from the NOMAD optimization package.

Dependencies

This code has been tested with Python versions 3.8-3.11 on linux.

The backend requires the NOMAD optimizer, which will be installed as a dependency from PyPI.

Installation

From PyPI:

pip install ropt-nomad

Usage

An optimization by ropt using the plugin works mostly as any other optimization run (see also the ropt documentation on GitHubPages or on Read the Docs). However, there are a few things to consider:

1. Gradients are not used, any specifications relating to gradient calculations in ropt are ignored.
2. Some standard optimization parameters that can be specified in the optimization section are ignored, specifically:
   • algorithm
   • tolerance
3. Only inequality constraints are supported by NOMAD.
4. Linear and non-linear constraints are both supported. Linear constraints are not supported directly, but are internally converted to non-linear constraints.
5. Additional options can be passed as a list of strings via the options field in the optimizer configuration. You can use any option that is supported by the NOMAD python interface, with the following exceptions:
   • The DIMENSION and cannot be overridden.
   • The MAX_ITERATIONS keyword can only be used if the max_iterations field is not set in the optimizer configuration.
   • BB_OUTPUT_TYPE can be overridden, which is useful to change the type of constraint handling.

Developement

To install, enter the distribution directory and execute:

pip install .

Running the tests

To run the test suite, install the necessary dependencies and execute pytest:

pip install .[test]
pytest