From ed322b24258c7bb19673090a23a6e43a1c13491a Mon Sep 17 00:00:00 2001
From: Dmitry Novikov <nerosketch@gmail.com>
Date: Wed, 27 Mar 2019 09:55:36 +0300
Subject: [PATCH] fix

---
 devapp/onu_config/base.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/devapp/onu_config/base.py b/devapp/onu_config/base.py
index 20c1fb9..a5687e4 100644
--- a/devapp/onu_config/base.py
+++ b/devapp/onu_config/base.py
@@ -71,6 +71,8 @@ def get_free_registered_onu_number(lines):
             onu_olt_num = int(num)
             if onu_olt_num > i:
                 return i
+    if onu_olt_num is None:
+        return 1
     return onu_olt_num + 1