made power set return lists for ease of usage

monkey/common/utils/itertools_extensions.py

@@ -6,4 +6,4 @@ def power_set(iterable):
     https://docs.python.org/3/library/itertools.html#itertools-recipes
     """
     s = list(iterable)
-    return chain.from_iterable(combinations(s, r) for r in range(1, len(s) + 1))
+    return [list(x) for x in list(chain.from_iterable(combinations(s, r) for r in range(1, len(s) + 1)))]

monkey/common/utils/test_power_set.py

@@ -5,14 +5,14 @@ class TestPower_set(TestCase):
     def test_power_set(self):
         before = ('a', 'b', 'c')
         after_expected = [
-            ('a', ),
-            ('b',),
-            ('c',),
-            ('a', 'b'),
-            ('a', 'c'),
-            ('b', 'c'),
-            ('a', 'b', 'c'),
+            ['a'],
+            ['b'],
+            ['c'],
+            ['a', 'b'],
+            ['a', 'c'],
+            ['b', 'c'],
+            ['a', 'b', 'c'],
         ]
 
         from common.utils.itertools_extensions import power_set
-        self.assertEquals(list(power_set(before)), after_expected)
+        self.assertEquals(power_set(before), after_expected)