Update app.py

app.py

@@ -30,12 +30,12 @@ assistant_id = "asst_YWSKwQEiYVGApJdxxrTH0Cy8"
 
 assistant, thread = None, None
 
-def today_tool() -> today: str:
+def today_tool() -> str:
     """Returns today's date. Use this function for any questions related to knowing today's date. 
        There should be no input. This function always returns today's date."""
     return str(date.today())
 
-def yf_download_tool(tickers: List[str], start_date: date, end_date: date) -> stock_data: pd.DataFrame:
+def yf_download_tool(tickers: List[str], start_date: date, end_date: date) -> pd.DataFrame:
     """Returns historical stock data for a list of given tickers from start date to end date 
        using the yfinance library download function. 
        Use this function for any questions related to getting historical stock data. 
@@ -43,7 +43,7 @@ def yf_download_tool(tickers: List[str], start_date: date, end_date: date) -> st
        This function always returns a pandas DataFrame."""
     return yf.download(tickers, start=start_date, end=end_date)
 
-def tavily_search_tool(query: str) -> answer: str:
+def tavily_search_tool(query: str) -> str:
     """Searches the web for a given query and returns an answer, "
        ready for use as context in a RAG application, using the Tavily API. 
        Use this function for any questions requiring knowledge not available to the model.