mypy...

Author: hmaarrfk

xarray/core/dataarray.py

@@ -459,7 +459,8 @@ def __init__(
 
         # These fully describe a DataArray
         self._variable = variable
-        self._coords = coords
+        # Variables can have undefined data type according to MyPy due to the fastpath
+        self._coords: Sequence[Sequence | pd.Index | DataArray] | Mapping  = coords  # type: ignore[assignment]
         self._name = name
         self._indexes = indexes  # type: ignore[assignment]