Tests are not running: E AttributeError: can't set attribute

[georghildebrand]

Hi guys, thanks for working on this. RDFLib is great!

To Reproduce
Follow install instructions (install requirements etc)

Run tests python -m pytest tests

Expected behavior
Tests should pass

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: MacOS, pvenv, python 3.9

`============================= test session starts ==============================
platform darwin -- Python 3.9.9, pytest-6.2.5, py-1.11.0, pluggy-1.0.0
rootdir: /workdir/RDFLib/rdflib-hdt
collected 29 items / 2 errors / 27 selected

==================================== ERRORS ====================================
___________________ ERROR collecting tests/hdt_store_test.py ___________________
tests/hdt_store_test.py:4: in
from rdflib_hdt import HDTStore, optimize_sparql
rdflib_hdt/init.py:12: in
from rdflib_hdt.sparql_op import optimize_sparql
rdflib_hdt/sparql_op.py:6: in
import rdflib.plugins.sparql.evaluate as sparql_evaluate
pyhdt_venv/lib/python3.9/site-packages/rdflib/plugins/sparql/init.py:35: in
from . import parser
pyhdt_venv/lib/python3.9/site-packages/rdflib/plugins/sparql/parser.py:182: in
Param('prefix', PN_PREFIX)) + Suppress(':').leaveWhitespace()
pyhdt_venv/lib/python3.9/site-packages/rdflib/plugins/sparql/parserutils.py:113: in init
self.name = name
E AttributeError: can't set attribute
___________________ ERROR collecting tests/wrappers_test.py ____________________
tests/wrappers_test.py:3: in
from rdflib_hdt import HDTDocument
rdflib_hdt/init.py:12: in
from rdflib_hdt.sparql_op import optimize_sparql
rdflib_hdt/sparql_op.py:6: in
import rdflib.plugins.sparql.evaluate as sparql_evaluate
pyhdt_venv/lib/python3.9/site-packages/rdflib/plugins/sparql/init.py:35: in
from . import parser
pyhdt_venv/lib/python3.9/site-packages/rdflib/plugins/sparql/parser.py:182: in
Param('prefix', PN_PREFIX)) + Suppress(':').leaveWhitespace()
pyhdt_venv/lib/python3.9/site-packages/rdflib/plugins/sparql/parserutils.py:113: in init
self.name = name
E AttributeError: can't set attribute
=============================== warnings summary ===============================
pyhdt_venv/lib/python3.9/site-packages/rdflib/plugins/sparql/compat.py:8
pyhdt_venv/lib/python3.9/site-packages/rdflib/plugins/sparql/compat.py:8
/workdir/RDFLib/rdflib-hdt/pyhdt_venv/lib/python3.9/site-packages/rdflib/plugins/sparql/compat.py:8: DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated since Python 3.3, and in 3.10 it will stop working
from collections import Mapping, MutableMapping # was added in 2.6

-- Docs: https://docs.pytest.org/en/stable/warnings.html
=========================== short test summary info ============================
ERROR tests/hdt_store_test.py - AttributeError: can't set attribute
ERROR tests/wrappers_test.py - AttributeError: can't set attribute
!!!!!!!!!!!!!!!!!!! Interrupted: 2 errors during collection !!!!!!!!!!!!!!!!!!!!`

[Callidon]

Hi 👋 It seems to be an issue with rdflib itself, because according to the stacktrace you posted, its the line import rdflib.plugins.sparql.evaluate as sparql_evaluate which fails.
Could to try to run this import statement in a separated python file with no rdflib_hdt import and see if the issue remains? if so, then I think you should report the issue to the rdflib project directly.

[georghildebrand]

@Callidon ack, that import is producing the error. I will open an Issue there. Thx for your fast feedback.

[georghildebrand]

@Callidon I just realized that the issue seems to be related to the version of rdflib when cloning and running the import in the latest:6.0.2

python -c "import rdflib.plugins.sparql.evaluate as sparql_evaluate"

Works fine

However, when using 6.0.2 next issue comes up with 'rdflib-hdt' but this time the test of an SPARQL fails it seems...

`============================= test session starts ==============================
platform darwin -- Python 3.9.9, pytest-6.2.5, py-1.11.0, pluggy-1.0.0
rootdir: /workdir/RDFLib/rdflib-hdt
collected 61 items

tests/hdt_document_test.py ........... [ 18%]
tests/hdt_iterators_test.py ................ [ 44%]
tests/hdt_store_test.py ..............................F [ 95%]
tests/join_iterator_test.py .. [ 98%]
tests/wrappers_test.py . [100%]

=================================== FAILURES ===================================
___________________________ test_rdflib_sparql_query ___________________________

def test_rdflib_sparql_query():
    optimize_sparql()
    graph = Graph(store=store)
    sparql_query = """
    PREFIX ex: <http://example.org/>
    SELECT * WHERE {
        ?s ex:p1 ?o
    }
    """

  qres = graph.query(sparql_query)

tests/hdt_store_test.py:80:

---

pyhdt_venv/lib/python3.9/site-packages/rdflib/graph.py:1301: in query
initNs = initNs or dict(self.namespaces())
pyhdt_venv/lib/python3.9/site-packages/rdflib/graph.py:1004: in namespaces
for prefix, namespace in self.namespace_manager.namespaces():
pyhdt_venv/lib/python3.9/site-packages/rdflib/graph.py:347: in _get_namespace_manager
self.__namespace_manager = NamespaceManager(self)
pyhdt_venv/lib/python3.9/site-packages/rdflib/namespace/init.py:334: in init
for p, n in self.namespaces(): # self.bind is not always called

---

self = <rdflib.namespace.NamespaceManager object at 0x108d99490>

def namespaces(self):

  for prefix, namespace in self.store.namespaces():

E TypeError: 'NoneType' object is not iterable

pyhdt_venv/lib/python3.9/site-packages/rdflib/namespace/init.py:559: TypeError
=========================== short test summary info ============================
FAILED tests/hdt_store_test.py::test_rdflib_sparql_query - TypeError: 'NoneTy...`