add solution week 257 task 1 in python

1 files changed, 29 insertions, 0 deletions

diff --git a/challenge-257/steven-wilson/python/ch-1.py b/challenge-257/steven-wilson/python/ch-1.py
new file mode 100644
index 0000000000..9ceaaf849f
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+++ b/challenge-257/steven-wilson/python/ch-1.py
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+#!/usr/bin/env python3
+
+from collections import Counter
+
+
+def smaller_than_current(*integers):
+    ''' Given an array of integers, find out how many integers are smaller than
+    current i.e. foreach ints[i], count ints[j] < ints[i] where i != j
+    >>> smaller_than_current(5, 2, 1, 6)
+    (2, 1, 0, 3)
+    >>> smaller_than_current(1, 2, 0, 3)
+    (1, 2, 0, 3)
+    >>> smaller_than_current(0, 1)
+    (0, 1)
+    >>> smaller_than_current(9, 4, 9, 2)
+    (2, 1, 2, 0)
+    '''
+    integer_counter = Counter(integers)
+    results = []
+    for i in integers:
+        results.append(sum(count for key, count in integer_counter.items()
+                           if key < i))
+    return tuple(results)
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod()