classylss is a lightweight Python binding of the CMB Boltzmann code, CLASS, with an emphasis on the routines that are important for large-scale structure calculations. The main modules of the CLASS code are exposed to the user via a Cython wrapper.

classylss is supported for Linux and macOS machines and Python versions 2.7, 3.5 and 3.6.

Getting Started

Help and Reference


The source code is available on GitHub: The code is under active development, and users can post bugs and request new features using GitHub issues.