Update app.py

app.py

@@ -19,14 +19,16 @@ wikipedia_search= WikipediaSearchTool()
 python_code_executor=PythonInterpreterTool()
 
 @tool
-def Excel_reader(file_path):
+def Excel_reader(file_path: str) -> str:
     """Reads a CSV file and returns the data frame including rows and columns.
     Args:
-    file_path: The path to the CSV file.
+        file_path: The path to the CSV file.
     """
     df = pd.read_csv(file_path)
     return df.to_string()
 
+
+
 excel_reader = Excel_reader()
 
 class BasicAgent: