Hparams: Workaround problem with '/.' in run names.

tensorboard/plugins/hparams/backend_context.py

@@ -191,6 +191,14 @@ def read_last_scalars(self, ctx, experiment_id, run_tag_filter):
             plugin_name=scalar_metadata.PLUGIN_NAME,
             run_tag_filter=run_tag_filter,
         )
+        # Transform keys of form 'SOMETHING/.' to just 'SOMETHING', in order for
+        # the data to be compatible with how run names are determined in the
+        # rest of the hparams plugin.
+        for key in list(last_scalars.keys()):
+          if key.endswith("/."):
+            last_scalars[key[0:len(key)-len("/.")]] = last_scalars[key]
+            del last_scalars[key]
+        return last_scalars
 
     def hparams_from_data_provider(self, ctx, experiment_id, limit):
         """Calls DataProvider.list_hyperparameters() and returns the result."""