Merge pull request #334 from davidhassell/dask-asdata

dask: `Data.asdata`

cf/data/data.py

@@ -8444,21 +8444,29 @@ def clip(self, a_min, a_max, units=None, inplace=False, i=False):
         return d
 
     @classmethod
+    @daskified(_DASKIFIED_VERBOSE)
     def asdata(cls, d, dtype=None, copy=False):
         """Convert the input to a `Data` object.
 
+        If the input *d* has the Data interface (i.e. it has a
+        `__data__` method), then the output of this method is used as
+        the returned `Data` object. Otherwise, `Data(d)` is returned.
+
         :Parameters:
 
             d: data-like
-                Input data in any form that can be converted to an cf.Data
-                object. This includes `cf.Data` and `cf.Field` objects,
-                numpy arrays and any object which may be converted to a
+                Input data in any form that can be converted to a
+                `Data` object. This includes `Data` and `Field`
+                objects, and objects with the Data interface, numpy
+                arrays and any object which may be converted to a
                 numpy array.
 
            dtype: data-type, optional
                 By default, the data-type is inferred from the input data.
 
-           copy:
+           copy: `bool`, optional
+                If True and *d* has the Data interface, then a copy of
+                `d.__data__()` is returned.
 
         :Returns:
 
@@ -8467,7 +8475,7 @@ def asdata(cls, d, dtype=None, copy=False):
                 input if it is already a `Data` object with matching dtype
                 and *copy* is False.
 
-        **Examples:**
+        **Examples**
 
         >>> d = cf.Data([1, 2])
         >>> cf.Data.asdata(d) is d

cf/test/test_Data.py

@@ -1150,7 +1150,6 @@ def test_Data__contains__(self):
         with self.assertRaises(TypeError):
             ["foo"] in d
 
-    @unittest.skipIf(TEST_DASKIFIED_ONLY, "no attr. 'partition_configuration'")
     def test_Data_asdata(self):
         if self.test_only and inspect.stack()[0][3] not in self.test_only:
             return