add web demo

Former-commit-id: b447fa85aa563b6105cfa64c9ec802c5bd63af56

README.md

@@ -291,6 +291,14 @@ python src/cli_demo.py \
     --checkpoint_dir path_to_checkpoint
 ```
 
+### Web Demo
+
+```bash
+python src/web_demo.py \
+    --model_name_or_path path_to_your_model \
+    --checkpoint_dir path_to_checkpoint
+```
+
 ### Export model
 
 ```bash

src/llmtuner/webui/chat.py

@@ -11,10 +11,12 @@ from llmtuner.webui.locales import ALERTS
 
 class WebChatModel(ChatModel):
 
-    def __init__(self):
+    def __init__(self, *args):
         self.model = None
         self.tokenizer = None
         self.generating_args = GeneratingArguments()
+        if len(args) != 0:
+            super().__init__(*args)
 
     def load_model(
         self,

src/llmtuner/webui/components/chatbot.py

@@ -1,4 +1,4 @@
-from typing import Dict, Tuple
+from typing import Dict, Optional, Tuple
 
 import gradio as gr
 from gradio.blocks import Block
@@ -8,9 +8,10 @@ from llmtuner.webui.chat import WebChatModel
 
 
 def create_chat_box(
-    chat_model: WebChatModel
+    chat_model: WebChatModel,
+    visible: Optional[bool] = False
 ) -> Tuple[Block, Component, Component, Dict[str, Component]]:
-    with gr.Box(visible=False) as chat_box:
+    with gr.Box(visible=visible) as chat_box:
         chatbot = gr.Chatbot()
 
         with gr.Row():

src/web_demo.py

@@ -0,0 +1,44 @@
+# coding=utf-8
+# Implements user interface in browser for fine-tuned models.
+# Usage: python web_demo.py --model_name_or_path path_to_model --checkpoint_dir path_to_checkpoint
+
+import gradio as gr
+from transformers.utils.versions import require_version
+
+from llmtuner import get_infer_args
+from llmtuner.webui.chat import WebChatModel
+from llmtuner.webui.components.chatbot import create_chat_box
+from llmtuner.webui.manager import Manager
+
+
+require_version("gradio>=3.36.0", "To fix: pip install gradio>=3.36.0")
+
+
+def main():
+    chat_model = WebChatModel(*get_infer_args())
+
+    with gr.Blocks(title="Web Demo") as demo:
+        lang = gr.Dropdown(choices=["en", "zh"], value="en")
+
+        _, _, _, chat_elems = create_chat_box(chat_model, visible=True)
+
+        manager = Manager([{"lang": lang}, chat_elems])
+
+        demo.load(
+            manager.gen_label,
+            [lang],
+            [lang] + [elem for elem in chat_elems.values()],
+        )
+
+        lang.change(
+            manager.gen_label,
+            [lang],
+            [lang] + [elem for elem in chat_elems.values()],
+        )
+
+    demo.queue()
+    demo.launch(server_name="0.0.0.0", share=False, inbrowser=True)
+
+
+if __name__ == "__main__":
+    main()