  $\mathtt{qnm}$ is an open-source Python package for computing the Kerr
quasinormal mode frequencies, angular separation constants, and
spherical-spheroidal mixing coefficients. The $\mathtt{qnm}$ package includes a
Leaver solver with the Cook-Zalutskiy spectral approach to the angular sector,
and a caching mechanism to avoid repeating calculations. We provide a large
cache of low $\ell, m, n$ modes, which can be downloaded and installed with a
single function call, and interpolated to provide good initial guess for
root-polishing at new values of spin.
