KAPOW is A Pythonic OpenMM Wrapper
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KAPOW - Kapow is A Pythonic OpenMM Wrapper


Kapow is an implementation of an adapter class designed to provide a more Pythonic interface to the OpenMM molecular simulation toolkit. Taking advantage of the dynamic properties of the Python programming language this module mostly aims to circumvent the use of getters and setters in OpenMM objects, replacing them with the use of properties and more sophisticated descriptors as required.

Apologies for the project name. In case you're wondering its a recursive acronymn (like GNU). Whilst common in the open source world, it is my firm belief they should be more widely used in scientific software.


At present this is very basic. The simtk.openmm package must already be installed so configure your Python environment as required, e.g. load any desired virtual environments. Download the source code of the project and from it's root directory run:

python setup.py install

If you encounter permission problems, an installation into your home directory may also be requested with:

python setup.py install --user

Test the installation by changing into the tests directory and running:

python test_adapter.py

Getting Started

An introductory ramble is available as demo.ipynb in the project's root directory.


This is an experimental early alpha release subject to rapid changes and guarantee of a fixed API.

Kapow has not yet been widely tested against different OpenMM versions. This release is tailored to OpenMM 7.2.1, other versions may not pass all the tests or even import successfully.