pyrrtm is a python wrapper to the RRTM radiation code.

RRTM is widely used in atmospheric science, but the code has a rather nasty ascii interface that is a big obstacle to using the code in scripts, and also inhibits performance if lots of radiative transfer calculations need doing. pyrrtm addresses these issues.

pyrrtm also includes a NetCDF-based command-line interface that can be used from outside python (it does not require python at all).