Add helper accessor to return final time slice

xbout/boutdataarray.py

@@ -1169,3 +1169,13 @@ def as_cherab_emitter(
             cylinder_rmax=cyliner_rmax,
             step=step,
         )
+
+    def final_time(self):
+        """
+        Returns the final time in the Dataset whether
+        it contains a time dimension or not.
+        """
+        if "t" in self.data.sizes:
+            return self.data.isel(t=-1)
+        else:
+            return self.data

xbout/boutdataset.py

@@ -1356,6 +1356,16 @@ def with_cherab_grid(self):
 
         return grid.ds_with_cherab_grid(self.data)
 
+    def final_time(self):
+        """
+        Returns the final time in the Dataset whether
+        it contains a time dimension or not.
+        """
+        if "t" in self.data.sizes:
+            return self.data.isel(t=-1)
+        else:
+            return self.data
+
 
 def _find_major_vars(data):
     """

xbout/xarraybackend.py

@@ -1,6 +1,6 @@
 """License:
-  Distributed under the OSI-approved Apache License, Version 2.0.  See
-  accompanying file Copyright.txt for details.
+Distributed under the OSI-approved Apache License, Version 2.0.  See
+accompanying file Copyright.txt for details.
 """
 
 from __future__ import annotations