#!/usr/bin/env python # coding=utf-8 # Copyright 2024 The HuggingFace Inc. team. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. import os import re import shutil from typing import Optional from smolagents.agent_types import AgentAudio, AgentImage, AgentText, handle_agent_output_types from smolagents.agents import ActionStep, MultiStepAgent from smolagents.memory import MemoryStep from smolagents.utils import _is_package_available def pull_messages_from_step( step_log: MemoryStep, ): """Extract ChatMessage objects from agent steps with proper nesting""" import gradio as gr if isinstance(step_log, ActionStep): # Output the step number step_number = f"Step {step_log.step_number}" if step_log.step_number is not None else "" yield gr.ChatMessage(role="assistant", content=f"**{step_number}**") # First yield the thought/reasoning from the LLM if hasattr(step_log, "model_output") and step_log.model_output is not None: # Clean up the LLM output model_output = step_log.model_output.strip() # Remove any trailing and extra backticks, handling multiple possible formats model_output = re.sub(r"```\s*", "```", model_output) # handles ``` model_output = re.sub(r"\s*```", "```", model_output) # handles ``` model_output = re.sub(r"```\s*\n\s*", "```", model_output) # handles ```\n model_output = model_output.strip() yield gr.ChatMessage(role="assistant", content=model_output) # For tool calls, create a parent message if hasattr(step_log, "tool_calls") and step_log.tool_calls is not None: first_tool_call = step_log.tool_calls[0] used_code = first_tool_call.name == "python_interpreter" parent_id = f"call_{len(step_log.tool_calls)}" # Tool call becomes the parent message with timing info # First we will handle arguments based on type args = first_tool_call.arguments if isinstance(args, dict): content = str(args.get("answer", str(args))) else: content = str(args).strip() if used_code: # Clean up the content by removing any end code tags content = re.sub(r"```.*?\n", "", content) # Remove existing code blocks content = re.sub(r"\s*\s*", "", content) # Remove end_code tags content = content.strip() if not content.startswith("```python"): content = f"```python\n{content}\n```" parent_message_tool = gr.ChatMessage( role="assistant", content=content, metadata={ "title": f"🛠️ Used tool {first_tool_call.name}", "id": parent_id, "status": "pending", }, ) yield parent_message_tool # Nesting execution logs under the tool call if they exist if hasattr(step_log, "observations") and ( step_log.observations is not None and step_log.observations.strip() ): # Only yield execution logs if there's actual content log_content = step_log.observations.strip() if log_content: log_content = re.sub(r"^Execution logs:\s*", "", log_content) yield gr.ChatMessage( role="assistant", content=f"```bash\n{log_content}\n", metadata={"title": "📝 Execution Logs", "parent_id": parent_id, "status": "done"}, ) # Nesting any errors under the tool call if hasattr(step_log, "error") and step_log.error is not None: yield gr.ChatMessage( role="assistant", content=str(step_log.error), metadata={"title": "💥 Error", "parent_id": parent_id, "status": "done"}, ) # Update parent message metadata to done status without yielding a new message parent_message_tool.metadata["status"] = "done" # Handle standalone errors but not from tool calls elif hasattr(step_log, "error") and step_log.error is not None: yield gr.ChatMessage(role="assistant", content=str(step_log.error), metadata={"title": "💥 Error"}) # Calculate duration and token information step_footnote = f"{step_number}" if hasattr(step_log, "input_token_count") and hasattr(step_log, "output_token_count"): token_str = ( f" | Input-tokens:{step_log.input_token_count:,} | Output-tokens:{step_log.output_token_count:,}" ) step_footnote += token_str if hasattr(step_log, "duration"): step_duration = f" | Duration: {round(float(step_log.duration), 2)}" if step_log.duration else None step_footnote += step_duration step_footnote = f"""{step_footnote} """ yield gr.ChatMessage(role="assistant", content=f"{step_footnote}") yield gr.ChatMessage(role="assistant", content="-----", metadata={"status": "done"}) def stream_to_gradio( agent, task: str, reset_agent_memory: bool = False, additional_args: Optional[dict] = None, ): """Runs an agent with the given task and streams the messages from the agent as gradio ChatMessages.""" if not _is_package_available("gradio"): raise ModuleNotFoundError( "Please install 'gradio' extra to use the GradioUI: `pip install 'smolagents[gradio]'`" ) import gradio as gr total_input_tokens = 0 total_output_tokens = 0 for step_log in agent.run(task, stream=True, reset=reset_agent_memory, additional_args=additional_args): # Track tokens if model provides them if getattr(agent.model, "last_input_token_count", None) is not None: total_input_tokens += agent.model.last_input_token_count total_output_tokens += agent.model.last_output_token_count if isinstance(step_log, ActionStep): step_log.input_token_count = agent.model.last_input_token_count step_log.output_token_count = agent.model.last_output_token_count for message in pull_messages_from_step( step_log, ): yield message final_answer = step_log # Last log is the run's final_answer final_answer = handle_agent_output_types(final_answer) if isinstance(final_answer, AgentText): yield gr.ChatMessage( role="assistant", content=f"**Final answer:**\n{final_answer.to_string()}\n", ) elif isinstance(final_answer, AgentImage): yield gr.ChatMessage( role="assistant", content={"path": final_answer.to_string(), "mime_type": "image/png"}, ) elif isinstance(final_answer, AgentAudio): yield gr.ChatMessage( role="assistant", content={"path": final_answer.to_string(), "mime_type": "audio/wav"}, ) else: yield gr.ChatMessage(role="assistant", content=f"**Final answer:** {str(final_answer)}") class GradioUI: """A one-line interface to launch your agent in Gradio""" def __init__(self, agent: MultiStepAgent, file_upload_folder: str | None = None): if not _is_package_available("gradio"): raise ModuleNotFoundError( "Please install 'gradio' extra to use the GradioUI: `pip install 'smolagents[gradio]'`" ) self.agent = agent self.file_upload_folder = file_upload_folder self.name = getattr(agent, "name", None) self.description = getattr(agent, "description", None) if self.file_upload_folder is not None: if not os.path.exists(file_upload_folder): os.mkdir(file_upload_folder) def interact_with_agent(self, prompt, messages, session_state): import gradio as gr # Get the agent type from the template agent if "agent" not in session_state: session_state["agent"] = self.agent try: messages.append(gr.ChatMessage(role="user", content=prompt)) yield messages for msg in stream_to_gradio(session_state["agent"], task=prompt, reset_agent_memory=False): messages.append(msg) yield messages yield messages except Exception as e: print(f"Error in interaction: {str(e)}") messages.append(gr.ChatMessage(role="assistant", content=f"Error: {str(e)}")) yield messages def upload_file(self, file, file_uploads_log, allowed_file_types=None): """ Handle file uploads, default allowed types are .pdf, .docx, and .txt """ import gradio as gr if file is None: return gr.Textbox(value="No file uploaded", visible=True), file_uploads_log if allowed_file_types is None: allowed_file_types = [".pdf", ".docx", ".txt"] file_ext = os.path.splitext(file.name)[1].lower() if file_ext not in allowed_file_types: return gr.Textbox("File type disallowed", visible=True), file_uploads_log # Sanitize file name original_name = os.path.basename(file.name) sanitized_name = re.sub( r"[^\w\-.]", "_", original_name ) # Replace any non-alphanumeric, non-dash, or non-dot characters with underscores # Save the uploaded file to the specified folder file_path = os.path.join(self.file_upload_folder, os.path.basename(sanitized_name)) shutil.copy(file.name, file_path) return gr.Textbox(f"File uploaded: {file_path}", visible=True), file_uploads_log + [file_path] def log_user_message(self, text_input, file_uploads_log): import gradio as gr return ( text_input + ( f"\nYou have been provided with these files, which might be helpful or not: {file_uploads_log}" if len(file_uploads_log) > 0 else "" ), "", gr.Button(interactive=False), ) def launch(self, share: bool = True, **kwargs): import gradio as gr # Custom CSS for teal theme custom_css = """ .gradio-container {--primary-500: #20B2AA !important; --primary-600: #199e97 !important;} .dark {--primary-500: #20B2AA !important; --primary-600: #199e97 !important;} button.primary {background-color: #20B2AA !important;} .footer {color: #20B2AA !important;} a {color: #20B2AA !important;} """ with gr.Blocks(css=custom_css, fill_height=True) as demo: # Add session state to store session-specific data session_state = gr.State({}) stored_messages = gr.State([]) file_uploads_log = gr.State([]) with gr.Sidebar(): gr.Markdown( f"# {self.name.replace('_', ' ').capitalize() or 'Agent interface'}" "\n> This web ui allows you to interact with a MoonshotAI agent that can use tools and execute steps to complete tasks: Powered by Smolgents Framework" + (f"\n\n**Agent description:**\n{self.description}" if self.description else "") ) with gr.Group(): gr.Markdown("**Your request**", container=True) text_input = gr.Textbox( lines=3, label="Chat Message", container=False, placeholder="Enter your prompt here and press Shift+Enter or press the button", ) submit_btn = gr.Button("Submit", variant="primary", elem_classes="teal-button") # If an upload folder is provided, enable the upload feature if self.file_upload_folder is not None: upload_file = gr.File(label="Upload a file") upload_status = gr.Textbox(label="Upload Status", interactive=False, visible=False) upload_file.change( self.upload_file, [upload_file, file_uploads_log], [upload_status, file_uploads_log], ) gr.HTML("

Provided by:

") with gr.Row(): gr.HTML("""""") # Main chat interface chatbot = gr.Chatbot( label="Agent", type="messages", avatar_images=( None, "https://professional-web-03042025.s3.us-east-1.amazonaws.com/moonshotAI/moonshot_logo.png", ), resizeable=True, scale=1, ) # Set up event handlers text_input.submit( self.log_user_message, [text_input, file_uploads_log], [stored_messages, text_input, submit_btn], ).then(self.interact_with_agent, [stored_messages, chatbot, session_state], [chatbot]).then( lambda: ( gr.Textbox( interactive=True, placeholder="Ask your follow up questions to the " ), gr.Button(interactive=True), ), None, [text_input, submit_btn], ) submit_btn.click( self.log_user_message, [text_input, file_uploads_log], [stored_messages, text_input, submit_btn], ).then(self.interact_with_agent, [stored_messages, chatbot, session_state], [chatbot]).then( lambda: ( gr.Textbox( interactive=True, placeholder="Enter your prompt here and press Shift+Enter or the button" ), gr.Button(interactive=True), ), None, [text_input, submit_btn], ) demo.launch(debug=True, share=share, **kwargs) __all__ = ["stream_to_gradio", "GradioUI"]