Update app.py

The get_last_prices tool is designed to fetch the most recent closing price for a specified stock ticker from Yahoo Finance. It utilizes the yfinance library to access intraday market data, retrieving data for the current day at one-minute intervals. Once the data is collected, the tool extracts the last available closing price and returns it as a string. This tool is particularly useful for applications requiring up-to-date market prices for financial analysis or trading purposes.

app.py

@@ -1,3 +1,5 @@
+pip install yfinance
+import yfinance
 from smolagents import CodeAgent,DuckDuckGoSearchTool, HfApiModel,load_tool,tool
 import datetime
 import requests
@@ -9,14 +11,20 @@ from Gradio_UI import GradioUI
 
 # Below is an example of a tool that does nothing. Amaze us with your creativity !
 @tool
-def my_custom_tool(arg1:str, arg2:int)-> str: #it's import to specify the return type
+def get_last_prices(ticker:str)-> str: #it's import to specify the return type
     #Keep this format for the description / args / args description but feel free to modify the tool
-    """A tool that does nothing yet 
-    Args:
-        arg1: the first argument
-        arg2: the second argument
     """
-    return "What magic will you build ?"
+    """
+    stock = yf.Ticker(ticker)
+
+    df = stock.history(period ="1d", interval = "1m")
+
+    if df.empty:
+        raise ValueError(f'Nessun dato disponibile per il ticker')
+
+    last_price = df['Close'].iloc[-1]
+    
+    return str(last_price)
 
 @tool
 def get_current_time_in_timezone(timezone: str) -> str: