Meep is an open-source finite-difference time-domain (FDTD)
simulation software package developed at MIT to model electromagnetic
systems : http://ab-initio.mit.edu/meep/

Python-meep is a wrapper around libmeep. It allows the scripting of Meep-simulations with Python (v2.6 and v2.7).

Python-meep comes with an tutorial in html (see the /doc subdirectory after extracting the installation file), of which a mirrored version is available online at :
http://claudia.intec.ugent.be/software/python-meep/python_meep_documentation.html

Consult the README file for details on how to install and build from source.

Check out the examples in the /samples directory.

For more details on the technical architecture and rationale behind Python-Meep, read this paper :
http://photonics.intec.ugent.be/download/pub_2579.pdf
"Python bindings for the open source electromagnetic simulator MEEP",Computing in Science and Engineering, 13(3), p.53-65 (2011), E. Lambert, M. Fiers, S. Nizamov, M. Tassaert, S. G. Johnson, P. Bienstman, W. Bogaerts

Complementarily, you can consult the following page by Filip Dominec on python-meep-utils :
https://github.com/FilipDominec/python-meep-utils