Change x.ss.iso_value to return a Scalar; also, coverage

grblas/_ss/matrix.py

@@ -356,7 +356,7 @@ def is_iso(self):
     def iso_value(self):
         if self.is_iso:
             # This may not be thread-safe if the parent is being modified in another thread
-            return next(self.itervalues())
+            return Scalar.from_value(next(self.itervalues()), dtype=self._parent.dtype, name="")
         raise ValueError("Matrix is not iso-valued")
 
     @property

grblas/_ss/vector.py

@@ -10,7 +10,7 @@
 from ..base import call
 from ..dtypes import _INDEX, INT64, UINT64, lookup_dtype
 from ..exceptions import _error_code_lookup, check_status, check_status_carg
-from ..scalar import _as_scalar
+from ..scalar import Scalar, _as_scalar
 from ..utils import _CArray, ints_to_numpy_buffer, libget, values_to_numpy_buffer, wrapdoc
 from .matrix import MatrixArray, _concat_mn, normalize_chunks
 from .prefix_scan import prefix_scan
@@ -100,7 +100,7 @@ def is_iso(self):
     def iso_value(self):
         if self.is_iso:
             # This may not be thread-safe if the parent is being modified in another thread
-            return next(self.itervalues())
+            return Scalar.from_value(next(self.itervalues()), dtype=self._parent.dtype, name="")
         raise ValueError("Vector is not iso-valued")
 
     @property

grblas/tests/test_vector.py

@@ -1846,6 +1846,7 @@ def test_iteration(v):
     assert len(list(v.ss.iterkeys(4))) == 2
     assert len(list(v.ss.itervalues(-3))) == 2
     assert len(list(v.ss.iteritems(-v.size))) == N
+    assert len(list(v.ss.itervalues(-v.size - 1))) == N
     assert len(list(v.ss.iterkeys(v.size + 1))) == 0
 
     v = Vector.ss.import_sparse(**v.ss.export("sparse"))