aimmspy Release Notes

This document provides a summary of the changes made in each release of the aimmspy module. It includes bug fixes, improvements, and new features introduced in each version.

Release History

  • Version 25.1.1.11 (Release Date: 2025-07-29)

    • Initial release of the aimmspy module.

    • The get_model method can now be called multiple times; it will update the model if it has changed since the last call. This is useful when the model is updated in the AIMMS IDE or changed dynamically in the AIMMS project.

    • Fixed an issue where it was not possible to make an assignment to a scalar element.

    • Fixed an issue where consecutive calls to data() for the same identifier with different data return types did not work correctly. For example, calling first with return_type=DataReturnTypes.ARROW and then with return_type=DataReturnTypes.PANDAS would always return the same data return type as the first call. This has been resolved.

    • Due to an issue with the Polars Python module in combination with Python 3.11 on Windows (see https://github.com/pola-rs/polars/issues/23142), the Polars library was downgraded from version 1.31.0 to 1.30.0. This is a temporary measure until the issue is resolved in a future release of Polars.

    • Improved error messages when attempting to extend a read-only domain set.

    • Added AimmsException and AimmsPyException classes to handle AIMMS-specific exceptions more gracefully.

    • Changed the way to refer to identifiers that are declared inside an AIMMS namespace. We now use the library (or module) prefix instead of the library (or module) name (similar to how it is done in the AIMMS language itself).

    • Introduced a Model class that can be retrieved using the get_model() method on the Project instance. This change allows to automatically create a stub file that is needed/used to access exposed AIMMS identifier in your Python script.

    • Fixed an issue when reading a integer column from a data frame into an AIMMS identifier.

    • Added a mapping option to deal with differences between column names om a date frame and AIMMS identifiers.

    • Added a return_type option to specify the return type on a per data() call basis.

    • Added a extendType option to control the behavior when adding new elements to a domain set.

  • Version 1.0.1post23 (Release Date: 2025-05-21)

    • Initial beta release of the aimmspy module.