1 files changed, 23 insertions, 0 deletions
diff --git a/challenge-320/steven-wilson/python/ch-2.py b/challenge-320/steven-wilson/python/ch-2.py
new file mode 100644
index 0000000000..5c5b4cbe35
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+++ b/challenge-320/steven-wilson/python/ch-2.py
@@ -0,0 +1,23 @@
+#!/usr/bin/env python3
+
+
+def sum_difference(integers):
+    """ Given an array of positive integers, return the absolute difference
+    between digit sum and element sum of the given array.
+
+    >>> sum_difference([1, 23, 4, 5])
+    18
+    >>> sum_difference([1, 2, 3, 4, 5])
+    0
+    >>> sum_difference([1, 2, 34])
+    27
+    """
+    element_sum = sum(integers)
+    digit_sum = sum(int(i) for i in "".join(map(str, integers)))
+    return abs(digit_sum - element_sum)
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod(verbose=True)