Merge pull request #451 from QuantEcon/warning-fix

Fix warning in test_pure_nash

Author: mmcky

quantecon/game_theory/tests/test_pure_nash.py

@@ -39,7 +39,7 @@ def setUp(self):
         for k in range(2, N-2+1):
             for ind in itertools.combinations(range(N), k):
                 a = np.ones(N, dtype=int)
-                a[[ind]] = 0
+                a[list(ind)] = 0
                 Unanimity_NE.append(tuple(a))
         Unanimity_NE.append((1,)*N)