Revision 39 as of 2007-01-12 09:30:12

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Small discussion and evaluation of different parsers.

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Name

Grammar

Module

Python

Comment

[http://www.python.org/doc/current/lib/module-shlex.html shlex]

C

included in distribution

[http://www.cosc.canterbury.ac.nz/~greg/python/Plex Plex]

C

lexical analysis module for Python, foundation for ["Pyrex"]

[http://pages.cpsc.ucalgary.ca/~aycock/spark/ Spark]

GLR

Python

["Yapps"]

LL(1)

Python

1-any, 2-1.5+

[http://starship.python.net/crew/scott/PyLR.html PyLR]

LR(1) LALR(1)

C

[http://gadfly.sourceforge.net/kwParsing.html kwParsing]

PyBison

C

bison grammar with python code actions

[http://www.first.gmd.de/smile/trap/ Trap - (broken link)]

LR

1.5.1+

[http://www.dabeaz.com/ply/ PLY]

SLR LALR(1)

Python

Python Lex-Yacc

[http://christophe.delord.free.fr/en/tpg/ ToyParserGenerator]

2.2+

[http://staff.washington.edu/sabbey/py_dparser/ DParser]

GLR

C

2.2+

grammar in doc strings

[http://www.lava.net/~newsham/pyggy/ PyGgy]

GLR

Python

2.2.1

[http://simpleparse.sourceforge.net/ SimpleParse]

-

2.0+

requires mxTextTools

[http://biopython.org/docs/api/Martel/README.html Martel - (broken link)]

Python

2.0+

requires mxTextTools

[http://www.lemburg.com/files/python/mxTextTools.html mxTextTools]

-

C

is not exactly a parser like we're used to, but it is a fast text-processing engine

[http://pyparsing.sourceforge.net/ pyparsing]

Python

2.2+

[http://www.antlr.org/ ANTLR]

LL1+

Python

stand-alone tool in Java. Latest version can produce Python code

[http://www.ncc.up.pt/fado/Yappy Yappy]

LALR

Python

2.2+

[http://cheeseshop.python.org/pypi/ZestyParser ZestyParser]

Python

Object-oriented, Pythonic parsing

Also see the Python ParserSig @ http://www.python.org/sigs/parser-sig/ to discuss and select a standard parser generator for Python.

For faster performance, one may use other parser generator systems and plug them in as modules.

For example:

Example of such usage is SeeGramWrap available from Edward C. Jones [http://members.tripod.com/~edcjones/pycode.html Python page], which is a heavily revised and upgraded version of the ANTLR C parser that is in [http://members.tripod.com/~edcjones/cgram.tar.gz cgram]. The lastest verson has been refactored to move some of the complexity from ANTLR to Python.

Martin von Loewis presented a paper at Python10, titled [http://www.python.org/sigs/parser-sig/towards-standard.html "Towards a Standard Parser Generator"] that surveyed the available parser generators for Python.

Books

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