A list of Python parsing tools initially imported from @nedbat's blog post.
Name Description License Updated Parses Used By Notes Ply Docstrings are used to associate lexer or parser rules with actions. The lexer uses Python regular expressions. LGPL v3.6 4/2015 LALR(1) lesscpy ply-hack group pyparsing Direct parser objects in python, built to parallel the grammar. MIT v2.0.3 8/2014 twill ANTLR Parser and lexical analyzer generator in Java. Generates parsing code in Python (as well as Java, C++, C#, Ruby, etc). BSD v4.4 7/2014 LL(*) pyPEG A parsing expression grammar toolkit for Python. GPL v 2.15 1/2015 PEG pydsl A language workbench written in Python. GPLv3 v 0.5.2 11/2014 LEPL A recursive descent parser. dual licensed MPL/LGPL v 5.1.3 9/2012 Discontinued Codetalker Python-based grammar definitions. MIT v 1.1 3/2014 funcparserlib Recurisve descent parsing library for Python based on functional combinators. MIT v0.3.6 5/2013 picoparse v0.9 3/2009 Aperiot Apache 2.0 v0.1.12 1/2012 PyGgy Lexes with DFA from a specification in a .pyl file. Parses GLR grammars from a specification in a .pyg file. Rules in both files have Python action code. Unlike most parser generators, the rule actions are all executed in a post-processing step. The parser isn't represented as a discrete object, but as globals in a module. Public Domain v0.4 8/2004 Python 3 compatible fork 0.4.1, discussion group Parsing LR(1) parser generator as well as CFSM and GLR parser drivers. MIT v1.4 12/2012 LR(1), CFSM, and GLR Rparse GPL v 1.1.0. 4/2010 LL(1) parser generator with AST generation. SableCC Java-based parser and lexical analyzer generator. Generates parsing code in Java, with alternative generators for other languages including Python. LGPL v 3.7 11/2012 GOLD Parser zlib/libpng v 5.2.0 8/2012 LALR Plex Python module for constructing lexical analysers. LGPL v 2.0 12/2009 compiles all of the regular expressions into a single DFA. Plex3 Python3 port of Plex 8/2012 No official release yeanpypa Yeanpypa is (yet another) framework to create recursive-descent parsers in Python. Public Domain 4/2010 Parsers are created by writing an EBNF-like grammar as Python expressions. ZestyParser MIT v 0.8.1 4/2007 BisonGen v 0.8.0b1 4/2005 DParser for Python A scannerless GLR parser BSD v 1.3.0 3/2013 Charming Python: DParser for Python: Exploring Another Python Parser Yapps Produces recursive-descent parsers, as a human would write. Designed to be easy to use rather than powerful or fast. Better suited for small parsing tasks like email addresses, simple configuration scripts, etc. MIT v 2.1.1 8/2003 PyBison Python binding to the Bison (yacc) and Flex (lex) parser-generator utilities GPL v 0.1.8 6/2004 LALR(1) Doesn't yet support Windows. Yappy v 1.9.4 8/2014 SLR, LR(1) and LALR(1) Uses python strings to declare the grammar. Toy Parser Generator LGPL v 3.2.2 12/2013 kwParsing An experimental parser generator implemented in Python which generates parsers implemented in Python. Python License v 1.3 SLR Gadfly Martel Martel uses regular expression format definition to generate a parser for flat- and semi-structured files. The parse tree information is passed back to the caller using XML SAX events. In other words, Martel lets you parse flat files as if they are in XML. BSD v 0.8 12/2001 BioPython versions 1.4-1.48 Last version included in BioPython SimpleParse Lexing and parsing in one step, but only deterministic grammars. BSD 2.11a2 8/2010 mxTextTools An unusual table-based parser. There is no generation step, the parser is hand-coded using primitives provided by the package. The parser is implemented in C for speed. (just above). eGenix Public License, similar to Python, compatible with GPL. v 3.2.8 7/2014 SimpleParse, Martel SPARK Uses docstrings to associate productions with actions. Unlike other tools, also includes semantic analysis and code generation phases. MIT v 0.7 pre-alpha 7 5/2002 FlexModule and BisonModule Macros to allow Flex and Bison to produce idiomatic lexers and parsers for Python. The generated lexers and parsers are in C, compiled into loadable modules. Pythonesque v 2.1 3/2002 Bison in a box Uses standard Bison to generate pure Python parsers. It actually reads the bison-generated .c file and generates Python code. GPL v 0.1.0 6/2001 LALR(1) Berkeley YACC Classic YACC, extended to generate Python code. Python support seems to be undocumented. Public Domain v 20141128 11/2014 LALR(1) PyLR Lexer is based on regular expressions. 12/1997 LR PyLR PyLR is a partial Python implementation of the OpenLR specification Apache 2.0 12/2014 announcement Construct A declarative parser (and builder) for binary data. BSD v 2.5.2 4/2014 ModGrammar A general-purpose library for constructing language parsers and interpreters for context-free grammar definitions. BSD v 0.10 2/2013 lrparsing Differs from other Python LR(1) parsers in using Python expressions as grammars, and offers disambiguation tools. AGPLv3 v 1.0.11 3/2015 LR(1) parser and a tokeniser docopt Generates a parser based on formalized conventions that are used for help messages and man pages for program interface description. MIT v 0.6.2 6/2014The Python standard library includes a few modules for special-purpose parsing problems. These are not general-purpose parsers, but don't overlook them. If your need overlaps with their capabilities, they're perfect:
Python Parsing Tools by Michael R. Bernstein is licensed under a Creative Commons Attribution 4.0 International License.
Based on a work at https://github.com/webmaven/python-parsing-tools/.
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