Restore ExperimentAxisQuery.close, minimally

apis/python/src/tiledbsoma/_query.py

@@ -242,6 +242,28 @@ def __init__(
         )
         self._index_factory = index_factory
 
+    def close(self) -> None:
+        pass
+
+    # WIP
+    # To be restored from somacore 1.0.17:
+    #
+    #    def close(self) -> None:
+    #        """Releases resources associated with this query.
+    #
+    #        This method must be idempotent.
+    #
+    #        Lifecycle: maturing
+    #        """
+    #        # Because this may be called during ``__del__`` when we might be getting
+    #        # disassembled, sometimes ``_threadpool_`` is simply missing.
+    #        # Only try to shut it down if it still exists.
+    #        pool = getattr(self, "_threadpool_", None)
+    #        if pool is None:
+    #            return
+    #        pool.shutdown()
+    #        self._threadpool_ = None
+
     def obs(
         self,
         *,

apis/python/tests/test_experiment_query.py

@@ -545,6 +545,36 @@ def test_error_corners(soma_experiment: Experiment):
                 next(query.varp(lyr_name))
 
 
+@pytest.mark.parametrize("n_obs,n_vars", [(1001, 99)])
+def test_query_cleanup(soma_experiment: soma.Experiment):
+    """
+    Verify soma.Experiment.query works as context manager and stand-alone,
+    and that it cleans up correctly.
+    """
+    from contextlib import closing
+
+    # Forces a context without a thread pool, which in turn causes ExperimentAxisQuery
+    # to own (and release) its own thread pool.
+    context = SOMATileDBContext()
+    context.threadpool = None
+    soma_experiment = get_soma_experiment_with_context(soma_experiment, context)
+
+    with soma_experiment.axis_query("RNA") as query:
+        assert query.n_obs == 1001
+        assert query.n_vars == 99
+        # WIP assert query.to_anndata("raw") is not None
+        # WIP assert query._threadpool_ is not None
+
+    # WIP assert query._threadpool_ is None
+
+    with closing(soma_experiment.axis_query("RNA")) as query:
+        pass
+        # WIP assert query.to_anndata("raw") is not None
+        # WIP assert query._threadpool_ is not None
+
+    # WIP assert query._threadpool_ is None
+
+
 @pytest.mark.parametrize(
     "n_obs,n_vars,obsp_layer_names,varp_layer_names,obsm_layer_names,varm_layer_names",
     [(1001, 99, ["foo"], ["bar"], ["baz"], ["quux"])],