Update app.py

app.py

@@ -3,6 +3,7 @@ import datetime
 import requests
 import pytz
 import yaml
+import os
 from tools.final_answer import FinalAnswerTool
 
 from Gradio_UI import GradioUI
@@ -40,7 +41,7 @@ def get_weather_api(city: str) -> str:
     Args:
         city (str): A string that represents a city name.
     """ 
-    api_key = 'ff33163dc424d6430b66535cb02dda7d'
+    api_key = os.environ["weather_api"]
     url = f"http://api.weatherstack.com/current?access_key={api_key}&query={city}"
 
     try: