improved error-handling

prompt_engeneering.py

@@ -18,7 +18,7 @@ def get_google_api_key():
     """Returns the Google API key from streamlit's secrets"""
     try:
         return secrets["google_search_api_key"]
-    except FileNotFoundError:
+    except (FileNotFoundError, IsADirectoryError):
         return os.environ["google_search_api_key"]
 
 
@@ -26,7 +26,7 @@ def get_google_cse_id():
     """Returns the Google CSE ID from streamlit's secrets"""
     try:
         return secrets["google_cse_id"]
-    except FileNotFoundError:
+    except (FileNotFoundError, IsADirectoryError):
         return os.environ["google_cse_id"]