Ссылка. "Другой" взгляд на DSL

http://pyparsing.wikispaces.com/

(+) http://pyparsing.wikispaces.com/Examples

(+) http://pyparsing.wikispaces.com/file/view/greeting.py/30112822/greeting.py

# greeting.py
#
# Demonstration of the parsing module, on the prototypical "Hello, World!" example
#
# Copyright 2003, by Paul McGuire
#
from pyparsing import Word, alphas

# define grammar
greet = Word( alphas ) + "," + Word( alphas ) + "!"

# input string
hello = "Hello, World!"

# parse input string
print hello, "->", greet.parseString( hello )