add Primitives for the 'xcor' and 'ycor' blocks

1 files changed, 5 insertions, 2 deletions

diff --git a/TurtleArt/taexportpython.py b/TurtleArt/taexportpython.py
index ad94a90..a85a17a 100644
--- a/TurtleArt/taexportpython.py
+++ b/TurtleArt/taexportpython.py
@@ -126,11 +126,14 @@ def _walk_action_stack(top_block, lc):
     """ Turn a stack of blocks into a list of ASTs """
     block = top_block
 
-    # value blocks are don't have a primitive
+    # value blocks don't have a primitive
     if block.is_value_block():
         raw_value = block.get_value()
         value_ast = value_to_ast(raw_value)
-        return [value_ast]
+        if value_ast is not None:
+            return [value_ast]
+        else:
+            return []
 
     def _get_prim(block):
         prim = lc.get_prim_callable(block.primitive)