1 files changed, 13 insertions, 0 deletions
diff --git a/itertoolset.py b/itertoolset.py
new file mode 100644
index 0000000..13bb896
--- /dev/null
+++ b/itertoolset.py
@@ -0,0 +1,13 @@
+from itertools import cycle, islice
+
+def roundrobin(*iterables):
+    """roundrobin('ABC', 'D', 'EF') --> A D E B F C"""
+    pending = len(iterables)
+    nexts = cycle(iter(it).next for it in iterables)
+    while pending:
+        try:
+            for next in nexts:
+                yield next()
+        except StopIteration:
+            pending -= 1
+            nexts = cycle(islice(nexts, pending))