PyRaTE is a new, parallel, non-local thermodynamic equilibrium radiative transfer code written in python. The population densities are computed using the escape probability method with density, temperature, velocity and molecular abundance variations taken into account. The code can handle all geometries and projection angles. Thanks to the fact that it makes use of the yt analysis toolkit, it can be used to post-process outputs from astrochemical simulations performed with all major astrophysical codes. The upper panel of the animated movie shows CO (J = 1 - 0) velocity slices of a simulated spherical core and the lower panel shows a spectra line from a ray ray passing through the centre of sphere. The red line traces the velocity as the animation in the upper panel progresses.