Add 'flatten' option to data.append_to_list to handle list-to-list adds

Author: ipspace

netsim/data/__init__.py

@@ -33,15 +33,18 @@ def get_a_list(x: typing.Any, ctx: typing.Optional[str] = None) -> list:
 * Create an empty list if it does not exist
 * Append the item to the list
 """
-def append_to_list(BX: typing.Optional[Box], list_name: str, item: typing.Any) -> list:
+def append_to_list(BX: typing.Optional[Box], list_name: str, item: typing.Any, flatten: bool = False) -> list:
   if BX is None:
     return []
 
   if not list_name in BX:
     BX[list_name] = []
 
   if not item in BX[list_name]:
-    BX[list_name].append(item)
+    if flatten and isinstance(item,list):
+      BX[list_name].extend(item)
+    else:
+      BX[list_name].append(item)
 
   return BX[list_name]