added middle_node.py

Author: sumeyyadede

middle_node.py

@@ -0,0 +1,28 @@
+from ll import LinkedList
+
+def middle_node(node):
+	node.data = node.next.data
+	node.next = node.next.next
+
+def print_ll(t):
+	while t:
+		print(t.data)
+		t = t.next
+	print("----")
+
+def main():
+
+	ll = LinkedList()
+	ll.insert("a")
+	ll.insert("b")
+	ll.insert("c")
+	ll.insert("d")
+	ll.insert("e")
+	ll.insert("f")
+	print_ll(ll.head)
+	node = ll.head.next.next
+	middle_node(node)
+	print_ll(ll.head)
+
+if __name__ == "__main__":
+	main()