Delete app.py

app.py

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-# ==============================================================================
-#  Tool World: Advanced Prototype (Hugging Face Space Version)
-# ==============================================================================
-#
-#  This script has been updated to run as a Hugging Face Space.
-#
-#  Key Upgrades from the original script:
-#  1.  **Hugging Face Model Integration**: Uses the 'google/gemma-3n-E4B' model
-#      from the Hugging Face Hub for argument extraction.
-#  2.  **Environment Variable Management**: Securely accesses the
-#      HUGGING_FACE_HUB_TOKEN using os.environ.get(), which is the standard
-#      for Hugging Face Spaces.
-#  3.  **Standard Dependencies**: All dependencies are managed via a
-#      `requirements.txt` file.
-#
-# ==============================================================================
-
-# ------------------------------
-#  1. INSTALL & IMPORT PACKAGES
-# ------------------------------
-import numpy as np
-import umap
-import gradio as gr
-from sentence_transformers import SentenceTransformer, util
-import matplotlib.pyplot as plt
-import json
-import os
-from datetime import datetime, timedelta
-import torch
-from transformers import AutoTokenizer, AutoModelForCausalLM
-
-# ------------------------------
-#  2. CONFIGURE & LOAD MODELS
-# ------------------------------
-
-print("⚙️ Loading embedding model...")
-# Using a powerful model for better semantic understanding
-embedder = SentenceTransformer('all-mpnet-base-v2')
-print("✅ Embedding model loaded.")
-
-# --- Configuration for Hugging Face Model-based Argument Extraction ---
-try:
-    HF_TOKEN = os.environ.get('HUGGING_FACE_HUB_TOKEN')
-    if HF_TOKEN is None:
-        raise ValueError("HUGGING_FACE_HUB_TOKEN secret not found.")
-
-    print("⚙️ Loading Hugging Face model for argument extraction...")
-    # Using the user-specified Gemma 3n model
-    model_id = "google/gemma-3n-E4B"
-
-    hf_tokenizer = AutoTokenizer.from_pretrained(model_id, token=HF_TOKEN)
-    hf_model = AutoModelForCausalLM.from_pretrained(
-        model_id,
-        token=HF_TOKEN,
-        torch_dtype=torch.bfloat16, # Use bfloat16 for efficiency
-        device_map="auto" # Automatically use GPU if available
-    )
-    USE_HF_LLM = True
-    print(f"✅ Successfully loaded '{model_id}' model.")
-
-except Exception as e:
-    USE_HF_LLM = False
-    print(f"⚠️ WARNING: Could not load the Hugging Face model. Reason: {e}")
-    print("   Argument extraction will be disabled.")
-
-
-# ------------------------------
-#  3. ADVANCED TOOL DEFINITION
-# ------------------------------
-
-class Tool:
-    """
-    Represents a tool with structured arguments and rich descriptive data
-    for high-quality embedding.
-    """
-    def __init__(self, name, description, args_schema, function, examples=None):
-        self.name = name
-        self.description = description
-        self.args_schema = args_schema
-        self.function = function
-        self.examples = examples or []
-        self.embedding = self._create_embedding()
-
-    def _create_embedding(self):
-        """
-        Creates a rich embedding by combining the tool's name, description,
-        argument structure, and examples.
-        """
-        schema_str = json.dumps(self.args_schema, indent=2)
-        examples_str = "\n".join([f" - Example: {ex['prompt']} -> Args: {json.dumps(ex['args'])}" for ex in self.examples])
-
-        embedding_text = (
-            f"Tool Name: {self.name}\n"
-            f"Description: {self.description}\n"
-            f"Argument Schema: {schema_str}\n"
-            f"Usage Examples:\n{examples_str}"
-        )
-        return embedder.encode(embedding_text, convert_to_tensor=True)
-
-    def __repr__(self):
-        return f"<Tool: {self.name}>"
-
-# ------------------------------
-#  4. TOOL IMPLEMENTATIONS
-# ------------------------------
-
-def get_weather_forecast(location: str, days: int = 1):
-    """Simulates fetching a weather forecast."""
-    if not isinstance(location, str) or not isinstance(days, int):
-        return {"error": "Invalid argument types. 'location' must be a string and 'days' an integer."}
-
-    weather_conditions = ["Sunny", "Cloudy", "Rainy", "Windy", "Snowy"]
-    response = {"location": location, "forecast": []}
-
-    for i in range(days):
-        date = (datetime.now() + timedelta(days=i)).strftime('%Y-%m-%d')
-        condition = np.random.choice(weather_conditions)
-        temp = np.random.randint(5, 25)
-        response["forecast"].append({
-            "date": date,
-            "condition": condition,
-            "temperature_celsius": temp
-        })
-    return response
-
-def create_calendar_event(title: str, date: str, duration_minutes: int = 60, participants: list = None):
-    """Simulates creating a calendar event."""
-    try:
-        event_time = datetime.strptime(date, '%Y-%m-%d %H:%M')
-        return {
-            "status": "success",
-            "event_created": {
-                "title": title,
-                "start_time": event_time.isoformat(),
-                "end_time": (event_time + timedelta(minutes=duration_minutes)).isoformat(),
-                "participants": participants or ["organizer"]
-            }
-        }
-    except ValueError:
-        return {"error": "Invalid date format. Please use 'YYYY-MM-DD HH:MM'."}
-
-def summarize_text(text: str, compression_level: str = 'medium'):
-    """Summarizes a given text based on a compression level."""
-    word_count = len(text.split())
-    ratios = {'high': 0.2, 'medium': 0.4, 'low': 0.7}
-    ratio = ratios.get(compression_level, 0.4)
-    summary_length = int(word_count * ratio)
-    summary = " ".join(text.split()[:summary_length])
-    return {"summary": summary + "...", "original_word_count": word_count, "summary_word_count": summary_length}
-
-def search_web(query: str, domain: str = None):
-    """Simulates a web search, with an optional domain filter."""
-    results = [
-        f"Simulated result 1 for '{query}'",
-        f"Simulated result 2 for '{query}'",
-        f"Simulated result 3 for '{query}'"
-    ]
-    if domain:
-        return {"status": f"Searching for '{query}' within '{domain}'...", "results": results}
-    return {"status": f"Searching for '{query}'...", "results": results}
-
-
-# ------------------------------
-#  5. DEFINE THE TOOLSET
-# ------------------------------
-
-tools = [
-    Tool(
-        name="weather_reporter",
-        description="Provides the weather forecast for a specific location for a given number of days.",
-        args_schema={
-            "type": "object",
-            "properties": {
-                "location": {"type": "string", "description": "The city and state, e.g., 'San Francisco, CA'"},
-                "days": {"type": "integer", "description": "The number of days to forecast", "default": 1}
-            },
-            "required": ["location"]
-        },
-        function=get_weather_forecast,
-        examples=[
-            {"prompt": "what's the weather like in London for the next 3 days", "args": {"location": "London", "days": 3}},
-            {"prompt": "forecast for New York tomorrow", "args": {"location": "New York", "days": 1}}
-        ]
-    ),
-    Tool(
-        name="calendar_creator",
-        description="Creates a new event in the user's calendar.",
-        args_schema={
-            "type": "object",
-            "properties": {
-                "title": {"type": "string", "description": "The title of the calendar event"},
-                "date": {"type": "string", "description": "The start date and time in 'YYYY-MM-DD HH:MM' format"},
-                "duration_minutes": {"type": "integer", "description": "The duration of the event in minutes", "default": 60},
-                "participants": {"type": "array", "items": {"type": "string"}, "description": "List of email addresses of participants"}
-            },
-            "required": ["title", "date"]
-        },
-        function=create_calendar_event,
-        examples=[
-            {"prompt": "Schedule a 'Project Sync' for tomorrow at 3pm with bob@example.com", "args": {"title": "Project Sync", "date": (datetime.now() + timedelta(days=1)).strftime('%Y-%m-%d 15:00'), "participants": ["bob@example.com"]}},
-            {"prompt": "new event: Dentist appointment on 2025-12-20 at 10:00 for 45 mins", "args": {"title": "Dentist appointment", "date": "2025-12-20 10:00", "duration_minutes": 45}}
-        ]
-    ),
-    Tool(
-        name="text_summarizer",
-        description="Summarizes a long piece of text. Can be set to high, medium, or low compression.",
-        args_schema={
-            "type": "object",
-            "properties": {
-                "text": {"type": "string", "description": "The text to be summarized."},
-                "compression_level": {"type": "string", "enum": ["high", "medium", "low"], "description": "The level of summarization.", "default": "medium"}
-            },
-            "required": ["text"]
-        },
-        function=summarize_text,
-        examples=[
-            {"prompt": "summarize this article for me, make it very short: [long text...]", "args": {"text": "[long text...]", "compression_level": "high"}}
-        ]
-    ),
-    Tool(
-        name="web_search",
-        description="Performs a web search to find information on a topic.",
-        args_schema={
-            "type": "object",
-            "properties": {
-                "query": {"type": "string", "description": "The search query."},
-                "domain": {"type": "string", "description": "Optional: a specific website domain to search within (e.g., 'wikipedia.org')."}
-            },
-            "required": ["query"]
-        },
-        function=search_web,
-        examples=[
-            {"prompt": "who invented the light bulb", "args": {"query": "who invented the light bulb"}},
-            {"prompt": "search for 'transformer models' on arxiv.org", "args": {"query": "transformer models", "domain": "arxiv.org"}}
-        ]
-    )
-]
-
-print(f"✅ {len(tools)} tools defined and embedded.")
-
-# ------------------------------
-#  6. CORE LOGIC: TOOL SELECTION & ARGUMENT EXTRACTION
-# ------------------------------
-
-def find_best_tool(user_intent: str):
-    """Finds the most semantically similar tool for a user's intent."""
-    intent_embedding = embedder.encode(user_intent, convert_to_tensor=True)
-    # Move tool embeddings to the same device as the intent embedding
-    tool_embeddings = [tool.embedding.to(intent_embedding.device) for tool in tools]
-    similarities = [util.pytorch_cos_sim(intent_embedding, tool_emb).item() for tool_emb in tool_embeddings]
-    best_index = int(np.argmax(similarities))
-    best_tool = tools[best_index]
-    best_score = similarities[best_index]
-    return best_tool, best_score, similarities
-
-def extract_arguments_hf(user_prompt: str, tool: Tool):
-    """
-    Uses a local Hugging Face model to extract structured arguments.
-    """
-    system_prompt = f"""
-    You are an expert at extracting structured data from natural language.
-    Your task is to analyze the user's prompt and extract the arguments required to call the tool: '{tool.name}'.
-
-    You must adhere to the following JSON schema for the arguments:
-    {json.dumps(tool.args_schema, indent=2)}
-
-    - If a value is not present in the prompt for a non-required field, omit it from the JSON.
-    - If a required value is missing, return a JSON object with an "error" key explaining what is missing.
-    - Today's date is {datetime.now().strftime('%Y-%m-%d')}.
-    - Respond ONLY with a valid JSON object. Do not include any other text, explanation, or markdown code blocks.
-    """
-
-    # Gemma instruction-following format
-    chat = [
-        {"role": "user", "content": f"{system_prompt}\n\nUser Prompt: \"{user_prompt}\""},
-    ]
-
-    prompt = hf_tokenizer.apply_chat_template(chat, tokenize=False, add_generation_prompt=True)
-
-    try:
-        inputs = hf_tokenizer.encode(prompt, add_special_tokens=False, return_tensors="pt").to(hf_model.device)
-
-        # Generate with the model
-        outputs = hf_model.generate(input_ids=inputs, max_new_tokens=256, do_sample=False)
-        decoded_output = hf_tokenizer.decode(outputs[0][len(inputs[0]):], skip_special_tokens=True)
-
-        # Clean the response to find the JSON object
-        json_str = decoded_output.strip()
-
-        # Find the first '{' and the last '}' to get the JSON part
-        json_start = json_str.find('{')
-        json_end = json_str.rfind('}')
-
-        if json_start != -1 and json_end != -1:
-            json_str = json_str[json_start : json_end + 1]
-            return json.loads(json_str)
-        else:
-            raise json.JSONDecodeError("No JSON object found in the model output.", json_str, 0)
-
-    except Exception as e:
-        print(f"Error during HF model inference or JSON parsing: {e}")
-        return {"error": f"Failed to extract arguments with the local LLM. Details: {str(e)}"}
-
-def execute_tool(user_prompt: str):
-    """The main pipeline: Find tool, extract args, execute."""
-    selected_tool, score, _ = find_best_tool(user_prompt)
-
-    if USE_HF_LLM:
-        print(f"⚙️ Selected Tool: {selected_tool.name}. Extracting arguments with Gemma...")
-        extracted_args = extract_arguments_hf(user_prompt, selected_tool)
-    else:
-        # Fallback if the model failed to load
-        extracted_args = {"error": "Argument extraction is disabled because the Hugging Face model could not be loaded."}
-
-    if 'error' in extracted_args:
-        print(f"❌ Argument extraction failed: {extracted_args['error']}")
-        # Ensure the final output string is valid JSON
-        final_output_str = json.dumps({
-            "error": "Execution failed during argument extraction.",
-            "details": extracted_args['error']
-        })
-        return (
-            user_prompt,
-            selected_tool.name,
-            f"{score:.3f}",
-            json.dumps(extracted_args, indent=2),
-            final_output_str
-        )
-
-    print(f"✅ Arguments extracted: {json.dumps(extracted_args, indent=2)}")
-
-    try:
-        print(f"🚀 Executing tool function: {selected_tool.name}...")
-        output = selected_tool.function(**extracted_args)
-        print(f"✅ Execution complete.")
-        output_str = json.dumps(output, indent=2)
-    except Exception as e:
-        print(f"❌ Tool execution failed: {e}")
-        output_str = f'{{"error": "Tool execution failed", "details": "{str(e)}"}}'
-
-    return (
-        user_prompt,
-        selected_tool.name,
-        f"{score:.3f}",
-        json.dumps(extracted_args, indent=2),
-        output_str
-    )
-
-
-# ------------------------------
-#  7. VISUALIZATION
-# ------------------------------
-
-def plot_tool_world(user_intent=None):
-    """Generates a 2D UMAP plot of the tool latent space."""
-    tool_vectors = [tool.embedding.cpu().numpy() for tool in tools]
-    labels = [tool.name for tool in tools]
-    all_vectors = tool_vectors
-
-    if user_intent and user_intent.strip():
-        intent_vector = embedder.encode(user_intent, convert_to_tensor=True).cpu().numpy()
-        all_vectors.append(intent_vector)
-        labels.append("Your Intent")
-
-    # UMAP requires at least 2 neighbors
-    n_neighbors = min(len(all_vectors) - 1, 5)
-    if n_neighbors < 1:
-        n_neighbors = 1
-
-    reducer = umap.UMAP(n_neighbors=n_neighbors, min_dist=0.3, metric='cosine', random_state=42)
-
-    # UMAP fit_transform requires at least 2 samples
-    if len(all_vectors) < 2:
-         # Create a dummy plot if there's not enough data
-        fig, ax = plt.subplots(figsize=(10, 7))
-        ax.text(0.5, 0.5, "Not enough data to create a plot.", ha='center', va='center')
-        return fig
-
-    reduced_vectors = reducer.fit_transform(all_vectors)
-
-    plt.style.use('seaborn-v0_8-whitegrid')
-    fig, ax = plt.subplots(figsize=(10, 7))
-
-    for i, label in enumerate(labels):
-        x, y = reduced_vectors[i]
-        if label == "Your Intent":
-            ax.scatter(x, y, color='red', s=150, zorder=5, label=label, marker='*')
-            ax.text(x, y + 0.05, label, fontsize=12, ha='center', color='red', weight='bold')
-        else:
-            ax.scatter(x, y, s=100, alpha=0.8, label=label)
-            ax.text(x, y + 0.05, label, fontsize=10, ha='center')
-
-    ax.set_title("Tool World: Latent Space Map", fontsize=16)
-    ax.set_xlabel("UMAP Dimension 1", fontsize=12)
-    ax.set_ylabel("UMAP Dimension 2", fontsize=12)
-    ax.grid(True)
-
-    handles, labels_legend = ax.get_legend_handles_labels()
-    by_label = dict(zip(labels_legend, handles))
-    ax.legend(by_label.values(), by_label.keys())
-
-    plt.tight_layout()
-    return fig
-
-
-# ------------------------------
-#  8. GRADIO INTERFACE
-# ------------------------------
-
-print("🚀 Launching Gradio interface...")
-
-with gr.Blocks(theme=gr.themes.Soft()) as demo:
-    gr.Markdown("# 🛠️ Tool World: Advanced Prototype (Hugging Face Version)")
-    gr.Markdown(
-        "Enter a natural language command. The system will select the best tool, "
-        "extract structured arguments with **google/gemma-3n-E4B**, and execute it."
-    )
-
-    with gr.Row():
-        with gr.Column(scale=1):
-            inp = gr.Textbox(
-                label="Your Intent",
-                placeholder="e.g., What's the weather in Paris for 2 days?",
-                lines=3
-            )
-            run_btn = gr.Button("Invoke Tool", variant="primary")
-
-            gr.Markdown("---")
-            gr.Markdown("### Examples")
-            gr.Examples(
-                examples=[
-                    "Schedule a 'Team Meeting' for tomorrow at 10:30 am",
-                    "What is the weather forecast in Tokyo for the next 5 days?",
-                    "search for the latest news on generative AI on reuters.com",
-                    "Please give me a very short summary of this text: The Industrial Revolution was the transition to new manufacturing processes in Europe and the United States, in the period from about 1760 to sometime between 1820 and 1840."
-                ],
-                inputs=inp
-            )
-
-        with gr.Column(scale=2):
-            gr.Markdown("### Invocation Details")
-            with gr.Row():
-                out_tool = gr.Textbox(label="Selected Tool", interactive=False)
-                out_score = gr.Textbox(label="Similarity Score", interactive=False)
-
-            out_args = gr.JSON(label="Extracted Arguments")
-            out_result = gr.JSON(label="Tool Execution Output")
-
-    with gr.Row():
-        gr.Markdown("---")
-        gr.Markdown("### Latent Space Visualization")
-        plot_output = gr.Plot(label="Tool World Map")
-
-    def process_and_plot(user_prompt):
-        if not user_prompt or not user_prompt.strip():
-            # Return empty state and the default plot
-            return "", "", {}, {}, plot_tool_world()
-
-        prompt, tool_name, score, args_json, result_json = execute_tool(user_prompt)
-        fig = plot_tool_world(user_prompt)
-
-        # Safely load JSON strings into objects for the UI
-        try:
-            args_obj = json.loads(args_json)
-        except (json.JSONDecodeError, TypeError):
-            args_obj = {"error": "Invalid JSON in arguments", "raw": args_json}
-
-        try:
-            result_obj = json.loads(result_json)
-        except (json.JSONDecodeError, TypeError):
-            result_obj = {"error": "Invalid JSON in result", "raw": result_json}
-
-        return tool_name, score, args_obj, result_obj, fig
-
-    run_btn.click(
-        fn=process_and_plot,
-        inputs=inp,
-        outputs=[out_tool, out_score, out_args, out_result, plot_output]
-    )
-
-    # Load the initial plot when the app starts
-    demo.load(fn=lambda: plot_tool_world(None), inputs=None, outputs=plot_output)
-
-demo.launch()