The following issue has been SUBMITTED.
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http://bugs.librdf.org/mantis/view.php?id=513
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Reported By: [email protected]
Assigned To:
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Project: Redland Language Bindings
Issue ID: 513
Category: api
Reproducibility: always
Severity: major
Priority: normal
Status: new
Binding Language (java, perl, php, python, ruby, tcl): python
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Date Submitted: 2012-06-21 14:03
Last Modified: 2012-06-21 14:03
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Summary: SELECT FROM without data file fails with
python-bindings
Description:
The following query:
PREFIX ab: <http://learningsparql.com/ns/addressbook#>
SELECT ?craigEmail FROM <ex002.ttl>
WHERE
{ ab:craig ab:email ?craigEmail . }
with roqet produces:
roqet: Querying from file ex007.rq
roqet: Query has a variable bindings result
result: [craigEmail=string("[email protected]")]
result: [craigEmail=string("[email protected]")]
roqet: Query returned 2 results
as expected.
However, the following python code produces no output ( that is no results):
#!/usr/bin/python
import RDF
test_query= \
"""
# filename: ex007.rq
PREFIX ab: <http://learningsparql.com/ns/addressbook#>
SELECT ?craigEmail FROM <ex002.ttl>
WHERE
{ ab:craig ab:email ?craigEmail . }
"""
storage=RDF.Storage(storage_name="hashes", name="test",
options_string="new='yes',hash-type='memory',dir='.'")
if storage is None: raise "new RDF.Storage failed"
model=RDF.Model(storage)
if model is None: raise "new RDF.model failed"
q = RDF.SPARQLQuery(test_query)
for result in q.execute(model):
print "{"
for k in result:
print " "+k+" = "+str(result[k])
print "}"
Steps to Reproduce:
run the above script
Additional Information:
raptor2-2.0.7
rasqal-0.9.29
redland-1.0.15
redland-bindings-1.0.14.1
all compiled from source
other queries with RDF work as expected, so the overall install should be OK
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Issue History
Date Modified Username Field Change
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2012-06-21 14:03 [email protected] Issue
2012-06-21 14:03 [email protected] Added: no_data.py
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