This contains some Sage/Cython code for working with Dirichlet characters using a numbering scheme described by Brian Conrey. I intend to eventually get this included in Sage, but for now I am developing it separately. Right now, to use this code, you can just use "load dirichlet_conrey.pyx" from a running Sage session, or you can run "sage setup.py install" to build it as a module and put it in your Sage python modules directory, so that you can use it as "import dirichlet_conrey.pyx". To run the doctests, you need to actually run setup.py to install the module.