Update app.py

app.py

@@ -43,6 +43,7 @@ AUTHORIZED_IMPORTS = [
     "json",  # JSON data serialization/deserialization
     "bs4",  # Beautiful Soup for HTML/XML parsing
     "pubchempy",  # Accessing PubChem chemical database
+    "yaml",
     "xml",  # XML processing
     "yahoo_finance",  # Fetching stock data
     "Bio",  # Bioinformatics tools (e.g., sequence analysis)