1 files changed, 22 insertions, 0 deletions
diff --git a/challenge-271/packy-anderson/python/ch-2.py b/challenge-271/packy-anderson/python/ch-2.py
new file mode 100755
index 0000000000..05d588853f
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+++ b/challenge-271/packy-anderson/python/ch-2.py
@@ -0,0 +1,22 @@
+#!/usr/bin/env python
+
+def sortByHammingWeight(ints):
+  # use Decorate-Sort-Undecorate idiom
+  # (yes, it's a Schwartzian Transformation)
+  decorated = [ ( i.bit_count(), i ) for i in ints ]
+  decorated.sort()
+  return [ i for (bits, i) in decorated ]
+
+def comma_join(arr):
+    return ', '.join(map(lambda i: str(i), arr))
+
+def solution(ints):
+    print(f'Input: @ints = ({comma_join(ints)})')
+    out = sortByHammingWeight(ints)
+    print(f'Output: ({comma_join(out)})')
+
+print('Example 1:')
+solution([0, 1, 2, 3, 4, 5, 6, 7, 8])
+
+print('\nExample 2:')
+solution([1024, 512, 256, 128, 64])
+\ No newline at end of file