fix issues

apis/python/src/tiledbsoma/_experiment.py

@@ -13,7 +13,7 @@
 
 from ._collection import Collection, CollectionBase
 from ._dataframe import DataFrame
-from ._index_util import build_index
+from ._index_util import tiledbsoma_build_index
 from ._measurement import Measurement
 from ._tdb_handles import Wrapper
 from ._tiledb_object import AnyTileDBObject
@@ -94,5 +94,7 @@ def axis_query(  # type: ignore
             measurement_name,
             obs_query=obs_query or query.AxisQuery(),
             var_query=var_query or query.AxisQuery(),
-            index_factory=functools.partial(build_index, context=self.context),
+            index_factory=functools.partial(
+                tiledbsoma_build_index, context=self.context
+            ),
         )

apis/python/src/tiledbsoma/_index_util.py

@@ -3,6 +3,8 @@
 SOMATileDBContext which would otherwise ensue.
 """
 
+from typing import Optional
+
 import numpy as np
 import pandas as pd
 
@@ -11,17 +13,20 @@
 from .options import SOMATileDBContext
 
 
-def build_index(
-    keys: np.typing.NDArray[np.int64], context: SOMATileDBContext
+def tiledbsoma_build_index(
+    keys: np.typing.NDArray[np.int64],
+    context: Optional[SOMATileDBContext],
 ) -> clib.IntIndexer:
     """Builds an indexer object compatible with :meth:`pd.Index.get_indexer`."""
     if len(np.unique(keys)) != len(keys):
         raise pd.errors.InvalidIndexError(
             "Reindexing only valid with uniquely valued Index objects"
         )
-    tdb_concurrency = int(
-        context.tiledb_ctx.config().get("sm.compute_concurrency_level", 10)
-    )
+    tdb_concurrency = 10
+    if context is not None:
+        tdb_concurrency = int(
+            context.tiledb_ctx.config().get("sm.compute_concurrency_level", 10)
+        )
     thread_count = tdb_concurrency // 2
     reindexer = clib.IntIndexer()
     reindexer.map_locations(keys, thread_count)

apis/python/tests/test_indexer.py

@@ -1,7 +1,7 @@
 import numpy as np
 import pandas as pd
 
-from tiledbsoma._index_util import build_index
+from tiledbsoma._index_util import tiledbsoma_build_index
 from tiledbsoma.options import SOMATileDBContext
 from tiledbsoma.options._soma_tiledb_context import _validate_soma_tiledb_context
 
@@ -16,7 +16,7 @@ def indexer_test(keys: np.array, lookups: np.array, fail: bool):
 def indexer_test_fail(keys: np.array, lookups: np.array):
     try:
         context = _validate_soma_tiledb_context(SOMATileDBContext())
-        index = build_index(keys, context)
+        index = tiledbsoma_build_index(keys, context)
         index.get_indexer(lookups)
         raise AssertionError("should have failed")
     except pd.errors.InvalidIndexError:
@@ -32,7 +32,7 @@ def indexer_test_fail(keys: np.array, lookups: np.array):
 
 def indexer_test_pass(keys: np.array, lookups: np.array):
     context = _validate_soma_tiledb_context(SOMATileDBContext())
-    indexer = build_index(keys, context)
+    indexer = tiledbsoma_build_index(keys, context)
     results = indexer.get_indexer(lookups)
     panda_indexer = pd.Index(keys)
     panda_results = panda_indexer.get_indexer(lookups)