From 309704997bddfcde182bb5cd0ffa238a9e49e0df Mon Sep 17 00:00:00 2001
From: rozetko <rozetko@corpglory.com>
Date: Tue, 13 Nov 2018 16:19:18 +0300
Subject: [PATCH] IndexError: list index out of range in close_filtering #240
 (#243)

---
 analytics/analytics/utils/common.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/analytics/analytics/utils/common.py b/analytics/analytics/utils/common.py
index 60151a9..58e3389 100644
--- a/analytics/analytics/utils/common.py
+++ b/analytics/analytics/utils/common.py
@@ -229,6 +229,8 @@ def get_av_model(patterns_list):
     return model_pat
 
 def close_filtering(pat_list, win_size):
+    if len(pat_list) == 0:
+        return []
     s = [[pat_list[0]]]
     k = 0
     for i in range(1, len(pat_list)):