updated the import for currency converter

app.py

@@ -4,7 +4,6 @@ import requests
 import pytz
 import yaml
 from tools.final_answer import FinalAnswerTool
-from forex_python.converter import CurrencyRates
 
 from Gradio_UI import GradioUI
 
@@ -29,13 +28,15 @@ def web_search(prompt: str) -> str:
     return search_tool(prompt)
 
 @tool
-def convert_currency(amount:float, from_currency:str, to_currency:str) -> float:
+def convert_currency(amount:float, from_currency:str, to_currency:str) -> str:
     """ A tool that converts a specified amount from one currency to another.
     Args:
         amount: The amount of money to convert (e.g. 10.5).
         from_currency: The currency code of the source currency (e.g., 'USD').
         to_currency: The currency code of the target currency (e.g., 'EUR').
     """
+    # Import module within function
+    from forex_python.converter import CurrencyRates, RatesNotAvailableError
     
     # Initialize the CurrencyRates object
     c = CurrencyRates()
@@ -104,6 +105,4 @@ agent = CodeAgent(
 )
 
 
-GradioUI(agent).launch()
-
-agent.run("How much is $1000 to rubles?")
+GradioUI(agent).launch()