1 files changed, 23 insertions, 0 deletions
diff --git a/challenge-233/steven-wilson/python/ch-2.py b/challenge-233/steven-wilson/python/ch-2.py
new file mode 100644
index 0000000000..7bd69c1e7e
--- /dev/null
+++ b/challenge-233/steven-wilson/python/ch-2.py
@@ -0,0 +1,23 @@
+#!/usr/bin/env python3
+
+from collections import Counter
+
+
+def frequencySort(elements):
+    """Return list sorted by frequency then decending order
+    >>> frequencySort([1, 1, 2, 2, 2, 3])
+    [3, 1, 1, 2, 2, 2]
+    >>> frequencySort([2, 3, 1, 3, 2])
+    [1, 3, 3, 2, 2]
+    >>> frequencySort([-1, 1, -6, 4, 5, -6, 1, 4, 1])
+    [5, -1, 4, 4, -6, -6, 1, 1, 1]
+    """
+    elemCount = Counter(elements)
+    return sorted(elements, key=lambda x: (elemCount[x], -x))
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod()
+