add Primitive object for 'clean' block

  - add function that groups together several Primitive objects as
    if they were consecutive lines of code

1 files changed, 4 insertions, 1 deletions

diff --git a/TurtleArt/taexportpython.py b/TurtleArt/taexportpython.py
index 1f7fb82..85d5295 100644
--- a/TurtleArt/taexportpython.py
+++ b/TurtleArt/taexportpython.py
@@ -131,7 +131,10 @@ def _walk_action_stack(top_block, lc):
             raise TypeError("cannot export block " + repr(block))
         if prim.export_me:
             new_ast = prim.get_ast(*arg_asts)
-            ast_list.append(new_ast)
+            if isinstance(new_ast, (list, tuple)):
+                ast_list.extend(new_ast)
+            else:
+                ast_list.append(new_ast)
         elif arg_asts:
             new_ast = ast.List(elts=arg_asts, ctx=ast.Load)
             ast_list.append(new_ast)