flex/bison like module in Python?

[Jerry Sievers]

Dear Pythonists;

Curious if there exists in Python package(s) for use as lexer/parser
for implementation of language grammars?

Already using cmd.py from the standard distro for it's basic features
but wishing for much more advanced capability. As such, I refer to
flex/bison because though complex they are general purpose and very
useful.

I am trying to avoid having to do the lexer/parser part in C if
possible.

Thanks.

 

[Paul McGuire]

Dear Pythonists;

Curious if there exists in Python package(s) for use as lexer/parser
for implementation of language grammars?

Already using cmd.py from the standard distro for it's basic features
but wishing for much more advanced capability. As such, I refer to
flex/bison because though complex they are general purpose and very
useful.

I am trying to avoid having to do the lexer/parser part in C if
possible.

Thanks.

Check out this page from the Python Wiki:
http://www.python.org/moin/LanguageParsing

(although I'm partial to pyparsing, myself...)

-- Paul

 

[Fredrik Lundh]

Curious if there exists in Python package(s) for use as lexer/parser
for implementation of language grammars?

(s) indeed:

http://www.nedbatchelder.com/text/python-parsers.html

</F>

 

[wolfgang haefelinger]

You may checkout

www.antlr.org

around Xmas - a extension for Python will be released.

Regards,
Wolfgang.

 

[Jean Brouwers]

For command line parsing, take a look at the shlex module, also in the
standard distro. It may fit your requirements for additional
functionality beyond cmd.

/Jean Brouwers

PS) We use SimpleParse/mxTextTools for parsing large log files, both
are listed on the web page mentioned below. In addition, check out
David Mertz' web pages 'Text Processing in Python' at

<http://gnosis.cx/TPiP/>