sgreen solutions to challenge 347

1 files changed, 27 insertions, 0 deletions

diff --git a/challenge-347/sgreen/python/ch-2.py b/challenge-347/sgreen/python/ch-2.py
new file mode 100755
index 0000000000..776a289e1d
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+++ b/challenge-347/sgreen/python/ch-2.py
@@ -0,0 +1,27 @@
+#!/usr/bin/env python3
+
+import re
+import sys
+
+
+def format_phone(input_string: str) -> str:
+    # Strip all non-digit characters
+    input_string = re.sub(r'\D', '', input_string)
+
+    parts = []
+    while input_string:
+        # Decide length of next part
+        l = 2 if len(input_string) == 4 else min(3, len(input_string))
+        parts.append(input_string[:l])
+        input_string = input_string[l:]
+
+    return '-'.join(parts)
+
+
+def main():
+    result = format_phone(sys.argv[1])
+    print(result)
+
+
+if __name__ == '__main__':
+    main()