bugfix

xarray/core/dataset.py

@@ -2900,12 +2900,13 @@ def _rename_all(self, name_dict, dims_dict):
         # in this case, convert to IndexVariable and set indexes
         # GH4107
         for name in set(self.dims):
-            indexvar = variables.pop(name).to_index_variable()
-            variables[name] = indexvar
-            if indexes is None:
-                indexes = dict()
-            indexes[name] = indexvar.to_index()
-            coord_names.add(name)
+            if name in variables:
+                indexvar = variables.pop(name).to_index_variable()
+                variables[name] = indexvar
+                if indexes is None:
+                    indexes = dict()
+                indexes[name] = indexvar.to_index()
+                coord_names.add(name)
 
         return variables, coord_names, dims, indexes
 
@@ -5806,6 +5807,7 @@ def filter_by_attrs(self, **kwargs):
         Examples
         --------
         >>> # Create an example dataset:
+        ...
         >>> import numpy as np
         >>> import pandas as pd
         >>> import xarray as xr
@@ -5986,6 +5988,7 @@ def map_blocks(
         ...     gb = da.groupby(groupby_type)
         ...     clim = gb.mean(dim="time")
         ...     return gb - clim
+        ...
         >>> time = xr.cftime_range("1990-01", "1992-01", freq="M")
         >>> month = xr.DataArray(time.month, coords={"time": time}, dims=["time"])
         >>> np.random.seed(123)