Create rotate_list_by_k.py

linked_lists/rotate_list_by_k.py

@@ -0,0 +1,25 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+# author: bt3gl
+
+
+def rotate_list_by_k(head, k):
+        
+    if head is None and head.next is None:
+        return None
+        
+    end, new_end, n = head, head, 1
+        
+    while end.next:
+        end = end.next
+        n += 1
+    end.next = head
+
+    for i in range(n - k % n - 1):
+        new_end = new_end.next
+            
+    new_head = new_end.next
+    new_end.next = None
+        
+    return new_head
+