1 files changed, 28 insertions, 0 deletions
diff --git a/challenge-322/steven-wilson/python/ch-1.py b/challenge-322/steven-wilson/python/ch-1.py
new file mode 100644
index 0000000000..1aa1d9b9c7
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+++ b/challenge-322/steven-wilson/python/ch-1.py
@@ -0,0 +1,28 @@
+#!/usr/bin/env python3
+
+from more_itertools import chunked
+
+
+def string_format(string, size):
+    """ Given a string and a positive integer, format the string, removing any
+    dashes, in groups of size given by the integer. The first group can be
+    smaller than the integer but should have at least one character. Groups
+    should be separated by dashes.
+
+    >>> string_format("ABC-D-E-F", 3)
+    'ABC-DEF'
+    >>> string_format("A-BC-D-E", 2)
+    'A-BC-DE'
+    >>> string_format("-A-B-CD-E", 4)
+    'A-BCDE'
+    """
+    characters = [c for c in reversed(string) if c.isalpha()]
+    chunks = chunked(characters, size)
+    grouped = ["".join(a) for a in chunks]
+    return "-".join(grouped)[::-1]
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod(verbose=True)