Fix Python 3.13 compatibility

- Pin Python to 3.12
- Update SDK to Gradio 5.12.0
- Revert to Gradio 5.x compatible syntax

README.md

@@ -5,13 +5,14 @@ title: amethyst
 colorFrom: red
 colorTo: purple
 sdk: gradio
-sdk_version: 4.44.0
+sdk_version: 5.12.0
+python_version: "3.12"
 app_file: app.py
 pinned: false
 license: apache-2.0
 ---
 # amethyst
 ## Description
-Add a description of this theme here!
+A beautiful purple/amethyst theme for Gradio apps.
 ## Contributions
-Thanks to [@hmb](https://huggingface.co/hmb) for adding this gradio theme!
+Thanks to [@hmb](https://huggingface.co/hmb) for adding this gradio theme!

app.py

@@ -2,7 +2,7 @@ import time
 
 import gradio as gr
 
-with gr.Blocks() as demo:
+with gr.Blocks(theme="hmb/amethyst") as demo:
     with gr.Row(equal_height=True):
         with gr.Column(scale=10):
             gr.Markdown(
@@ -113,14 +113,14 @@ with gr.Blocks() as demo:
     with gr.Row():
         with gr.Column(scale=2):
             chatbot = gr.Chatbot(
-                [{"role": "user", "content": "Hello"}, {"role": "assistant", "content": "Hi"}],
+                [("Hello", "Hi")],
                 label="Chatbot",
             )
             chat_btn = gr.Button("Add messages")
 
             chat_btn.click(
                 lambda history: history
-                + [{"role": "user", "content": "How are you?"}, {"role": "assistant", "content": "I am good."}]
+                + [("How are you?", "I am good.")]
                 + (time.sleep(2) or []),
                 chatbot,
                 chatbot,
@@ -134,4 +134,4 @@ with gr.Blocks() as demo:
 
 
 if __name__ == "__main__":
-    demo.queue().launch(theme="hmb/amethyst")
+    demo.queue().launch()