Fix types

pydata · Aug 17, 2024 · aa52ce6 · aa52ce6
1 parent 961ec6a
commit aa52ce6
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diff --git a/xarray/core/groupby.py b/xarray/core/groupby.py
@@ -1049,7 +1049,7 @@ def quantile(
            The American Statistician, 50(4), pp. 361-365, 1996
         """
         if dim is None:
-            dim = self._group_dim
+            dim = (self._group_dim,)
 
         # Dataset.quantile does this, do it for flox to ensure same output.
         q = np.asarray(q, dtype=np.float64)

diff --git a/xarray/groupers.py b/xarray/groupers.py
@@ -106,6 +106,7 @@ def __init__(
             self.unique_coord = unique_coord
 
         if coords is None:
+            assert not isinstance(self.unique_coord, _DummyGroup)
             self.coords = _coordinates_from_variable(self.unique_coord)
         else:
             self.coords = coords