@@ -321,13 +321,13 @@ class LearnerND(BaseLearner):

         # simplex hasn't been deleted yet

         while True:

             loss, simplex, subsimplex = heapq.heappop(self._losses_combined) 

-            if (subsimplex is None and 

-                    simplex in self.tri.simplices and 

-                    simplex not in self._subtriangulations):

+            if (subsimplex is None

+                    and simplex in self.tri.simplices

+                    and simplex not in self._subtriangulations):

                 return abs(loss), simplex, subsimplex

-            if (simplex in self._subtriangulations and

-                    simplex in self.tri.simplices and 

-                    subsimplex in self._subtriangulations[simplex].simplices):

+            if (simplex in self._subtriangulations

+                    and simplex in self.tri.simplices

+                    and subsimplex in self._subtriangulations[simplex].simplices):

                 return abs(loss), simplex, subsimplex

     def _ask_best_point(self):