Avoid a copy.

dcherian · dcherian · commit f65cb521694e · 2022-06-29T22:08:23.000-06:00
diff --git a/flox/core.py b/flox/core.py
@@ -1327,7 +1327,7 @@ def _factorize_multiple(by, expected_groups, by_is_dask, reindex):
             **kwargs,
         )
         found_groups = tuple(
-            None if is_duck_dask_array(b) else pd.unique(np.array(b).reshape(-1)) for b in by
+            None if is_duck_dask_array(b) else pd.unique(b.reshape(-1)) for b in by
         )
         grp_shape = tuple(len(e) for e in expected_groups)
     else:

Original file line number	Diff line number	Diff line change
`@@ -1327,7 +1327,7 @@ def _factorize_multiple(by, expected_groups, by_is_dask, reindex):`
`1327`	`1327`	`**kwargs,`
`1328`	`1328`	`)`
`1329`	`1329`	`found_groups = tuple(`
`1330`		`- None if is_duck_dask_array(b) else pd.unique(np.array(b).reshape(-1)) for b in by`
	`1330`	`+ None if is_duck_dask_array(b) else pd.unique(b.reshape(-1)) for b in by`
`1331`	`1331`	`)`
`1332`	`1332`	`grp_shape = tuple(len(e) for e in expected_groups)`
`1333`	`1333`	`else:`