Update app.py

app.py

@@ -5,6 +5,11 @@ import sys
 # Replace YOUR_API_KEY_HERE with your actual API key from OpenWeatherMap
 api_key = "1aafc3163909c1493596da9340e00aee"
 
+# Check if a city name was provided as a command line argument
+if len(sys.argv) < 2:
+    print("Please provide a city name as a command line argument.")
+    sys.exit(1)
+
 # Get the city name from the command line arguments
 city_name = sys.argv[1]