Update app.py

app.py

@@ -34,7 +34,7 @@ def today_tool(text: str) -> str:
        This function always returns today's date."""
     return str(date.today())
 
-def yf_download_tool(tickers: List[str], start: date, end: date) -> pd.DataFrame:
+def yf_download_tool(tickers: List[str], start_date: date, end_date: date) -> pd.DataFrame:
     """Returns historical stock data for given tickers from a start date to an end date 
        using the yfinance library download function. 
        Use this function for any questions related to getting historical stock data. 
@@ -268,7 +268,7 @@ gr.ChatInterface(
                   ["Fix: x = [5, 2, 1, 3, 4]; print(x.sort())"],
                   ["Optimize: x = []; for i in range(0, 10000): x.append(i)"],
                   ["Execute: First 25 Fibbonaci numbers"],
-                  ["Get today's date, then generate a chart using mock data, showing stock gain YTD for NVDA, MSFT, AAPL, and GOOG, x-axis is 'Day' and y-axis is 'YTD Gain %'"]
+                  ["Get today's date, then generate a chart using stock data, showing YTD gain for NVDA, MSFT, AAPL, and GOOG, x-axis is 'Day' and y-axis is 'YTD Gain %'"]
                  ],
         cache_examples=False,
     ).launch()