No revision -> no personas

shared.py

@@ -68,14 +68,16 @@ class Client:
         self.revision = revision
     
     def get_personas(self):
-        try:
-            config_path = hf_hub_download(self.model_name, "config.yaml",
-                                    subfolder="datasets",
-                                    revision=self.revision)
-            self.config = ModelConfig.from_yaml(config_path)
-            personas = self.config.pile.persona2system
-        except EntryNotFoundError:
-            personas = {}
+        personas = {}
+        if self.revision is not None:
+            try:
+                config_path = hf_hub_download(self.model_name, "config.yaml",
+                                        subfolder="datasets",
+                                        revision=self.revision)
+                self.config = ModelConfig.from_yaml(config_path)
+                personas = self.config.pile.persona2system
+            except EntryNotFoundError:
+                pass
 
         personas["default"] = None
         self.personas = self.input_personas | personas