Update app.py

convert df to string

app.py

@@ -11,7 +11,7 @@ from Gradio_UI import GradioUI
 
 # Below is an example of a tool that does nothing. Amaze us with your creativity !
 @tool
-def get_stock_price(ticker_symbol:str)-> DataFrame: #it's import to specify the return type
+def get_stock_price(ticker_symbol: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 searches for the historic price of a stock symbol given the symbol ticker name and a period.
     Args:
@@ -21,7 +21,7 @@ def get_stock_price(ticker_symbol:str)-> DataFrame: #it's import to specify the
     try:
         data = yf.Ticker(ticker_symbol)
         historic_price = data.history(period=time_period)        
-        return historic_price
+        return historic_price.to_string()
     except error:
         return f"Error getting the price for {stock_symbol}"