Compatibility with python 3.8

app.py

@@ -1,6 +1,6 @@
 import os
 from threading import Thread
-from typing import Iterator
+from typing import Iterator, List, Tuple
 
 import gradio as gr
 import spaces
@@ -43,7 +43,7 @@ if torch.cuda.is_available():
 @spaces.GPU
 def generate(
     message: str,
-    chat_history: list[tuple[str, str]],
+    chat_history: List[Tuple[str, str]],
     system_prompt: str,
     max_new_tokens: int = 1024,
     temperature: float = 0.6,
@@ -142,4 +142,4 @@ with gr.Blocks(css="style.css") as demo:
     gr.Markdown(LICENSE)
 
 if __name__ == "__main__":
-    demo.queue(max_size=20).launch()
+    demo.queue(max_size=20).launch(share=True)