  We describe pyro: a simple, freely-available code to aid students in learning
the computational hydrodynamics methods widely used in astrophysics. pyro is
written with simplicity and learning in mind and intended to allow students to
experiment with various methods popular in the field, including those for
advection, compressible and incompressible hydrodynamics, multigrid, and
diffusion in a finite-volume framework. We show some of the test problems from
pyro, describe its design philosophy, and suggest extensions for students to
build their understanding of these methods.
