Re: which Snowball stemmers are in PyLucene?

2009-10-28 Thread Andi Vajda 


On Oct 28, 2009, at 12:09, Bill Janssen jans...@parc.com wrote:


Andi Vajda va...@apache.org wrote:


The snowball JAR comes from this statement in the Makefile:
SNOWBALL_JAR=$(LUCENE)/build/contrib/snowball/lucene-snowball-$ 
(LUCENE_VER).jar


Which means that it's whatever corresponds to the Lucene version
checked out. For PyLucene 2.9.0, that is:
  http://svn.apache.org/repos/asf/lucene/java/tags/lucene_2_9_0

In other words, this is a question best asked on the
java-u...@lucene.apache.org mailing list as PyLucene doesn't do
anything different (at least intentionally).


I've looked through that set of APIs, and don't see anything useful.
This was more of a brainstorming question for the list...

What could we do in Python to enumerate the list?


import lucene
lucene.initVM(classpath=lucene.CLASSPATH)
for n,v in lucene.__dict__.items():

 ...if n.endswith(Stemmer):
 ...   print n, lucene.SnowballProgram.instance_(v)
 ...


That is checking if a class is an instance of SnowballProgram which is  
probably not what you want. Use isAssignableFrom() maybe ?


There may be an API in the Snowball library to do this enumeration. I  
don't know and that's why I suggested asking java-user. Nothing wrong  
with brainstorming here, of course.


Andi..




ItalianStemmer False
FrenchStemmer False
HungarianStemmer False
LovinsStemmer False
RussianStemmer False
FinnishStemmer False
PortugueseStemmer False
KpStemmer False
BrazilianStemmer False
DanishStemmer False
TurkishStemmer False
DutchStemmer False
SwedishStemmer False
German2Stemmer False
EnglishStemmer False
GermanStemmer False
RomanianStemmer False
PorterStemmer False
NorwegianStemmer False
SpanishStemmer False

Seems to me that this should give different results.  Am I using the  
JCC

instance_ method improperly?

Bill

Re: which Snowball stemmers are in PyLucene?

2009-10-28 Thread Andi Vajda 


On Wed, 28 Oct 2009, Marvin Humphrey wrote:


On Wed, Oct 28, 2009 at 12:20:55PM -0700, Andi Vajda wrote:


There may be an API in the Snowball library to do this enumeration.


There's this, from libstemmer.h:

   /** Returns an array of the names of the available stemming algorithms.
*  Note that these are the canonical names - aliases (ie, other names for
*  the same algorithm) will not be included in the list.
*  The list is terminated with a null pointer.
*
*  The list must not be modified in any way.
*/
   const char ** sb_stemmer_list(void);


Sorry, I should have said in the java library.

Andi..