Reimplementation of the classic "purity" game in Python

 A program which reads yes/no questions from a specially formated file
 and administers a quiz with them, printing out then number/percent of
 yes's at the end.
 .
 The goal of is a reimplementation of "purity" in Python, while still
 maintaining compatibility with the old dataformat, and to eventually
 be a drop-in replacement for purity.