Fix to WeightedPauliOperator (qiskit-community/qiskit-aqua#891)

manoelmarques · Apr 7, 2020 · e8c5a7e · e8c5a7e
1 parent 866e1ae
commit e8c5a7e
Showing 1 changed file with 1 addition and 2 deletions.
diff --git a/qiskit/aqua/operators/weighted_pauli_operator.py b/qiskit/aqua/operators/weighted_pauli_operator.py
@@ -365,9 +365,8 @@ def simplify(self, copy=False):
                         break
             for idx in indices:
                 new_idx = old_to_new_indices[idx]
-                if new_idx is not None:
+                if new_idx is not None and new_idx not in new_indices:
                     new_indices.append(new_idx)
-            new_indices = list(set(new_indices))
             if new_indices and not found:
                 new_basis.append((basis, new_indices))
         op._basis = new_basis