Fix accidental bug that prevented custom textboxes from being passed to chatinterface (#7783)

* Add code

* add changeset

* Update gradio/chat_interface.py

Co-authored-by: Abubakar Abid <abubakar@huggingface.co>

---------

Co-authored-by: gradio-pr-bot <gradio-pr-bot@users.noreply.github.com>
Co-authored-by: Abubakar Abid <abubakar@huggingface.co>

.changeset/gold-suns-hang.md

@@ -0,0 +1,5 @@
+---
+"gradio": patch
+---
+
+fix:Fix accidental bug that prevented custom textboxes from being passed to chatinterface

gradio/chat_interface.py

@@ -206,9 +206,7 @@ class ChatInterface(Blocks):
                         textbox.container = False
                         textbox.show_label = False
                         textbox_ = textbox.render()
-                        if not isinstance(textbox_, Textbox) or not isinstance(
-                            textbox_, MultimodalTextbox
-                        ):
+                        if not isinstance(textbox_, (Textbox, MultimodalTextbox)):
                             raise TypeError(
                                 f"Expected a gr.Textbox or gr.MultimodalTextbox component, but got {type(textbox_)}"
                             )

test/test_chat_interface.py

@@ -56,6 +56,25 @@ class TestInit:
         fns = [fn for fn in chat.fns if fn.name in {"_submit_fn", "_api_submit_fn"}]
         assert all(fn.concurrency_limit == 10 for fn in fns)
 
+    def test_custom_textbox(self):
+        def chat():
+            return "Hello"
+
+        gr.ChatInterface(
+            chat,
+            chatbot=gr.Chatbot(height=400),
+            textbox=gr.Textbox(placeholder="Type Message", container=False, scale=7),
+            title="Test",
+            clear_btn="Clear",
+        )
+        gr.ChatInterface(
+            chat,
+            chatbot=gr.Chatbot(height=400),
+            textbox=gr.MultimodalTextbox(container=False, scale=7),
+            title="Test",
+            clear_btn="Clear",
+        )
+
     def test_events_attached(self):
         chatbot = gr.ChatInterface(double)
         dependencies = chatbot.dependencies