tinylambda
diff --git a/‎functional_program/functional_sequence_operate/__init__.py‎ b/‎functional_program/functional_sequence_operate/__init__.py‎
diff --git a/‎functional_program/functional_sequence_operate/functional_sequence_op.py‎
Lines changed: 26 additions & 0 deletions b/‎functional_program/functional_sequence_operate/functional_sequence_op.py‎
Lines changed: 26 additions & 0 deletions
@@ -0,0 +1,26 @@
+from typing import Iterator, Any, Tuple
+
+Item_Iter = Iterator[Any]
+Pairs_Iter = Iterator[Tuple[float, float]]
+
+
+def pairs(iterator: Item_Iter) -> Pairs_Iter:
+    def pairs_from(head: Any, iterable_tail: Item_Iter) -> Pairs_Iter:
+        nxt = next(iterable_tail)
+        yield head, nxt
+        yield from pairs_from(nxt, iterable_tail)
+
+    try:
+        return pairs_from(next(iterator), iterator)
+    except StopIteration:
+        return iter([])
+
+
+if __name__ == '__main__':
+    l = [0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7]
+    # l = [0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7] * 1000  # maximum recursion depth.
+    for item in pairs(iter(l)):
+        print(item)
+
+
+