4/25/2007 - Ryan O'Neil, a graduate student from George Mason University, released into the open source community his GEP library for Python. In his words, "PyGEP is a simple library suitable for academic study of Gene Expression Programming in Python 2.5, aiming for ease of use and rapid implementation. It provides standard multigenic chromosomes; a population class using elitism and fitness scaling for selection; mutation, crossover and transposition operators; and some standard GEP functions and linkers." PyGEP is hosted at https://code.google.com/p/pygep/.