Xapian discuss - Mar 2006 - Get term list from Query in python

I want to get term list from Query object right after qp.parse_query().
But my program written in python generates an error.
What's wrong with me? 



Sungsoo Kim


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database = xapian.Database(db)
qp = xapian.QueryParser()
qp.set_database(database)
qp.set_default_op(xapian.Query.OP_AND)
qp.set_stemming_strategy(xapian.QueryParser.STEM_NONE)
query = qp.parse_query(input, xapian.QueryParser.FLAG_LOVEHATE)
enquire = xapian.Enquire(database)
enquire.set_query(query)
print "Performing query '%s'" % query.get_description()
for term in query: print term



$ python search.py -v cup book
Performing query 'Xapian::Query((cup:(pos=1) AND book:(pos=2)))'
Traceback (most recent call last):
  File "search.py", line 197, in ?
    main()
  File "search.py", line 191, in main
    search(string.join(args))
  File "search.py", line 77, in search
    for term in query: print term
  File "/usr/lib64/python2.3/site-packages/xapian.py", line 747, in
next
    r = [self.iter.get_term(), self.iter.get_wdf(), self.iter.get_termfreq(),
PositionIter(self.iter.positionlist_begin(), self.iter.positionlist_end())]
  File "/usr/lib64/python2.3/site-packages/xapian.py", line 186, in
get_termfreq
    def get_termfreq(*args): return _xapian.TermIterator_get_termfreq(*args)
RuntimeError: InvalidOperationError: VectorTermList::get_termfreq() not
supported
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On Sat, Mar 11, 2006 at 12:56:24AM +0900, Sungsoo Kim
wrote:
> for term in query: print term
> RuntimeError: InvalidOperationError: VectorTermList::get_termfreq() not
supported
The problem is that get_termfreq() isn't meaningful for terms in a
query, but the python bindings ask for it anyway in this case.

I'll take a look.

Cheers,
    Olly

>> > RuntimeError: InvalidOperationError:
VectorTermList::get_termfreq() not supported
> OK, I've fixed this in SVN.  The attached patch should do the trick,
but
> to use it you'll need to configure xapian-bindings with
> --enable-maintainer-mode and have SWIG 1.3.28 installed.

I have confirmed I can get term list in the query successfully after the patch.
Thanks a lot!


Sungsoo Kim