1 files changed, 19 insertions, 0 deletions
diff --git a/challenge-258/roger-bell-west/python/ch-2.py b/challenge-258/roger-bell-west/python/ch-2.py
new file mode 100755
index 0000000000..4fdf1cdd21
--- /dev/null
+++ b/challenge-258/roger-bell-west/python/ch-2.py
@@ -0,0 +1,19 @@
+#! /usr/bin/python3
+
+def sumofvalues(a, k):
+  return sum(a[i] for i in range(len(a)) if i.bit_count() == k)
+
+import unittest
+
+class TestSumofvalues(unittest.TestCase):
+
+  def test_ex1(self):
+    self.assertEqual(sumofvalues([2, 5, 9, 11, 3], 1), 17, 'example 1')
+
+  def test_ex2(self):
+    self.assertEqual(sumofvalues([2, 5, 9, 11, 3], 2), 11, 'example 2')
+
+  def test_ex3(self):
+    self.assertEqual(sumofvalues([2, 5, 9, 11, 3], 0), 2, 'example 3')
+
+unittest.main()