CliMT
climt is a Toolkit for building Earth system models in Python. climt stands for Climate Modelling and Diagnostics Toolkit -- it is meant both for creating models and for generating diagnostics (radiative fluxes for an atmospheric column, for example). However, since it might eventually include model components for purposes other than climate modelling (local area models, large-eddy simulation), we prefer to keep the abbreviation un-expanded!
Links:
PyAOS