On Sep 19, 9:34 pm, Peng Yu <pengyu...@gmail.com> wrote: > On Sep 19, 6:05 pm, Robert Kern <robert.k...@gmail.com> wrote: > >http://nedbatchelder.com/text/python-parsers.html > > This is more a less just a list of parsers. I would like some detailed > guidelines on which one to choose for various parsing problems.
it would be simpler if you described what you want to do - parsers can be used for a lot of problems. also, the parsers do not exist in isolation - you need to worry about whether they are supported, how good the documentation is, etc. and different parsers handle different grammars - see http://wiki.python.org/moin/LanguageParsing - so if you already have a particular grammar then your life is simpler if you choose a parser that matches. these are the three that i know most about - i think all three are currently maintained: for simple parsing problems, i think pyparsing is the most commonly used - http://pyparsing.wikispaces.com/ my own lepl - http://www.acooke.org/lepl/ - tries to combine ease of use with some more advanced features the nltk - http://www.nltk.org/ - is particularly targeted at parsing natural languages and includes a wide variety of tools. but for parsing a large project you might be better interfacing to a compiled parser (lepl has memoisation, so should scale quite well, but it's not something i've looked at in detail yet). andrew -- http://mail.python.org/mailman/listinfo/python-list
