1 files changed, 30 insertions, 0 deletions
diff --git a/challenge-263/sgreen/python/ch-2.py b/challenge-263/sgreen/python/ch-2.py
new file mode 100755
index 0000000000..a3a6d6a181
--- /dev/null
+++ b/challenge-263/sgreen/python/ch-2.py
@@ -0,0 +1,30 @@
+#!/usr/bin/env python3
+
+from collections import defaultdict
+import json
+import sys
+
+
+def merge_items(*arrays) -> list:
+    # Calculate the total of each items
+    totals = defaultdict(int)
+    for array in arrays:
+        for item in array:
+            item_id, item_qty = item
+            totals[item_id] += item_qty
+
+    # Turn this into a sorted list of item_id and item_qty pairs
+    return [[item, totals[item]] for item in sorted(totals)]
+
+
+def main():
+    # Convert each input into a list of lists
+    arrays = []
+    for json_str in sys.argv[1:]:
+        arrays.append(json.loads(json_str))
+    result = merge_items(*arrays)
+    print(json.dumps(result))
+
+
+if __name__ == '__main__':
+    main()