tweak repr (#7521)

panel/chat/message.py

@@ -698,3 +698,6 @@ def serialize(
             prefix_with_viewable_label=prefix_with_viewable_label,
             prefix_with_container_label=prefix_with_container_label,
         )
+
+    def __repr__(self, depth: int = 0) -> str:
+        return f"ChatMessage(object={self.object!r}, user={self.user!r}, reactions={self.reactions!r})"

panel/chat/utils.py

@@ -127,7 +127,7 @@ def get_obj_label(obj):
     Get the label for the object; defaults to specified object name;
     if unspecified, defaults to the type name.
     """
-    label = obj.name
+    label = obj.name if hasattr(obj, "name") else ""
     type_name = type(obj).__name__
     # If the name is just type + ID, simply use type
     # e.g. Column10241 -> Column

panel/tests/chat/test_feed.py

@@ -608,6 +608,15 @@ def test_update_chat_log_params(self, chat_feed):
         assert chat_feed._chat_log.scroll_button_threshold == 10
         assert chat_feed._chat_log.auto_scroll_limit == 10
 
+    def test_repr(self, chat_feed):
+        chat_feed.send("A")
+        chat_feed.send("B")
+        assert repr(chat_feed) == (
+            "ChatFeed(_placeholder=ChatMessage, sizing_mode='stretch_width')\n"
+            "    [0] ChatMessage(object='A', user='User', reactions=[])\n"
+            "    [1] ChatMessage(object='B', user='User', reactions=[])"
+        )
+
 
 @pytest.mark.xdist_group("chat")
 class TestChatFeedPromptUser:

panel/tests/chat/test_message.py

@@ -390,3 +390,11 @@ def test_serialize_audio(self):
     def test_serialize_dataframe(self):
         message = ChatMessage(DataFrame(pd.DataFrame({'a': [1, 2, 3]})))
         assert message.serialize() == "DataFrame=   a\n0  1\n1  2\n2  3"
+
+    def test_repr(self):
+        message = ChatMessage(object="Hello", user="User", avatar="A", reactions=["favorite"])
+        assert repr(message) == "ChatMessage(object='Hello', user='User', reactions=['favorite'])"
+
+    def test_repr_dataframe(self):
+        message = ChatMessage(pd.DataFrame({'a': [1, 2, 3]}), avatar="D")
+        assert repr(message) == "ChatMessage(object=   a\n0  1\n1  2\n2  3, user='User', reactions=[])"