need to check lists

benchmarks/run_benchmarks.py

@@ -9,7 +9,7 @@
 from cpmpy.exceptions import TransformationNotImplementedError
 
 # give this a meaningful name, so we know what branch was tested after the results are safed.
-branch = 'has_nested'
+branch = 'has_nested_simple'
 # set solver to test (suported: ortools)
 solver = 'ortools'
 # solver timeout in seconds

cpmpy/expressions/utils.py

@@ -131,6 +131,8 @@ def argval(a):
 def is_leaf(a):
     if hasattr(a, 'is_leaf'):
         return a.is_leaf()
+    if is_any_list(a):
+        return all([is_leaf(x) for x in a])
     else:
         return True