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pyparsing 2.0.1

Python parsing module

Package Documentation

Latest Version: 2.2.0

PyParsing -- A Python Parsing Module


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.

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 the use of '+', '|' and '^' operator

The parsed results returned from parseString() can be accessed as a
nested list, a dictionary, or an object with named attributes.

The pyparsing module handles some of the problems that are typically
vexing when writing text parsers:
- extra or missing whitespace (the above program will also handle
"Hello,World!", "Hello , World !", etc.)
- quoted strings
- embedded comments

The .zip file includes examples of a simple SQL parser, simple CORBA IDL
parser, a config file parser, a chemical formula parser, and a four-
function algebraic notation parser. It also includes a simple how-to
document, and a UML class diagram of the library's classes.


Do the usual:

python install

The latest version of pyparsing (2.0.1) requires Python 2.6 or later.





MIT License. See header of


See CHANGES file.  
File Type Py Version Uploaded on Size
pyparsing-2.0.1.tar.gz (md5) Source 2013-07-17 1MB
pyparsing-2.0.1.win32-py2.6.exe (md5) MS Windows installer any 2013-07-17 98KB
pyparsing-2.0.1.win32-py2.7.exe (md5) MS Windows installer any 2013-07-17 98KB
pyparsing-2.0.1.win32-py3.0.exe (md5) MS Windows installer any 2013-07-17 98KB
pyparsing-2.0.1.win32-py3.1.exe (md5) MS Windows installer any 2013-07-17 98KB
pyparsing-2.0.1.win32-py3.2.exe (md5) MS Windows installer any 2013-07-17 98KB
pyparsing-2.0.1.win32-py3.3.exe (md5) MS Windows installer any 2013-07-17 221KB (md5) Source 2013-07-17 1MB