Pattern Matching In Python. Interesting article for people like me, i.e. for people who like Snobol4 or its "successor" (in quotation marks, because it is then a completely different language) Icon and would like an alternative to regular expressions. Implements a pattern-matching system very similar to the Icon model, complete with backtracking and generators. However, it is from 2004 and is rather a proof-of-concept story, not necessarily a directly usable and installable Python module. Unlike SnoPy, it is pure Python and not a Swig-based wrapper for an Ada Library.