app.py

from smolagents import CodeAgent, HfApiModel, load_tool, tool
import datetime
import pytz
import yaml
from tools.final_answer import FinalAnswerTool
from Gradio_UI import GradioUI

@tool
def calculator(operation: str) -> str:
    """A simple calculator tool that safely evaluates basic math expressions.
    
    Args:
        operation: The mathematical expression to evaluate (e.g., "2 + 2", "5 * 3"). 
                  Supports basic operations (+, -, *, /) and parentheses.
    
    Returns:
        str: The result of the calculation or an error message
    """
    try:
        allowed_chars = set("0123456789+-*/ .()")
        if not all(c in allowed_chars for c in operation):
            return "Error: Only basic math operations allowed"
        result = eval(operation, {"__builtins__": {}})
        return f"Result: {result}"
    except Exception as e:
        return f"Error calculating {operation}: {str(e)}"

@tool
def get_current_time_in_timezone(timezone: str) -> str:
    """Get the current time in a specified timezone.
    
    Args:
        timezone: The name of the timezone to get time for (e.g., 'America/New_York', 
                 'Asia/Tokyo', 'UTC'). Must be a valid timezone string.
    
    Returns:
        str: The current time in the specified timezone or an error message
    """
    try:
        tz = pytz.timezone(timezone)
        local_time = datetime.datetime.now(tz).strftime("%Y-%m-%d %H:%M:%S")
        return f"The current local time in {timezone} is: {local_time}"
    except Exception as e:
        return f"Error fetching time for timezone '{timezone}': {str(e)}"

def initialize_agent():
    """Initialize and return the CodeAgent with all tools."""
    
    # Initialize tools
    final_answer = FinalAnswerTool()
    web_search = DuckDuckGoSearchTool(max_results=5)  # Initialize DDG search with 5 results
    visit_webpage = VisitWebpageTool()
    
# Initialize components
final_answer = FinalAnswerTool()

# Initialize the model
model = HfApiModel(
    max_tokens=2096,
    temperature=0.5,
    model_id='Qwen/Qwen2.5-Coder-32B-Instruct',
    custom_role_conversions=None,
)

# Load prompt templates
with open("prompts.yaml", 'r') as stream:
    prompt_templates = yaml.safe_load(stream)

# Initialize agent with all tools
agent = CodeAgent(
    model=model,
    tools=[
        final_answer,
        calculator,
        get_current_time_in_timezone
    ],
    max_steps=6,
    verbosity_level=1,
    grammar=None,
    planning_interval=None,
    name=None,
    description=None,
    prompt_templates=prompt_templates
)

# Launch Gradio UI
if __name__ == "__main__":
    GradioUI(agent).launch()