introduced DOnion: a dask array within another dask array

dask_grblas/_automethods.py

@@ -0,0 +1,21 @@
+from grblas import config
+
+
+def _get_value(self, attr=None, default=None):
+    if config.get("autocompute"):
+        if self._value is None:
+            self._value = self.new()
+            if getattr(self, "is_dOnion", False):
+                self._value = self._value.strip()
+        if attr is None:
+            return self._value
+        else:
+            return getattr(self._value, attr)
+    if default is not None:
+        return default.__get__(self)
+    raise TypeError(
+        f"{attr} not enabled for objects of type {type(self)}.  "
+        f"Use `.new()` to create a new {self.output_type.__name__}.\n\n"
+        "Hint: use `grblas.config.set(autocompute=True)` to enable "
+        "automatic computation of expressions."
+    )

dask_grblas/_ss/matrix.py

@@ -30,3 +30,27 @@ def diag(self, vector, k=0, chunks="auto", dtype=None):
         vector = self._parent._expect_type(vector, dgb.Vector, within="ss.diag", argname="vector")
         rv = vector._diag(k, chunks=chunks, dtype=dtype)
         self._parent.__init__(rv._delayed, nvals=rv._nvals)
+
+    def build_scalar(
+        self,
+        rows,
+        columns,
+        values,
+        *,
+        dup_op=None,
+        clear=False,
+        nrows=None,
+        ncols=None,
+        chunks=None,
+        in_dOnion=False,  # not part of the API
+    ):
+        self._parent.build(
+            rows,
+            columns,
+            values,
+            dup_op=dup_op,
+            clear=clear,
+            nrows=nrows,
+            ncols=ncols,
+            chunks=chunks,
+        )