Avoid trying to remove values already removed

simpleai-team · Nov 23, 2013 · 4713dca · 4713dca
1 parent 091698a
commit 4713dca
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/simpleai/search/arc.py b/simpleai/search/arc.py
@@ -26,8 +26,8 @@ def revise(domains, arc, constraints):
 
     modified = False
 
-    for x_value in domains[x]:
-        for neighbors, constraint in related_constraints:
+    for neighbors, constraint in related_constraints:
+        for x_value in domains[x]:
             constraint_results = (_call_constraint({x: x_value, y: y_value},
                                                    neighbors, constraint)
                                   for y_value in domains[y])