python3-pyparsing-3.0.9-1.lbn36.noarch

PyParsing – A Python Parsing Module

Introduction The pyparsing module is an alternative approach to creating and executing simple grammars, vs. the traditional lex/yacc approach, or the use of regular expressions. The pyparsing module provides a library of classes that client code uses to construct the grammar directly in Python code. [Since first writing this description of pyparsing in late 2003, this technique for developing parsers has become more widespread, under the name Parsing Expression Grammars - PEGs. See more information on PEGs here .] Here is a program to parse "Hello, World!" (or any greeting of the form "salutation, addressee!"): from pyparsing import Word, alphas greet = Word(alphas) + "," + Word(alphas) + "!" hello = "Hello, World!" print(hello, "->", greet.parseString(hello)) The program outputs the following: Hello, World! -> [Hello, ',', World, '!'] The Python representation of the grammar is quite readable, owing to the self-explanatory class names, and t