From 17ba1b9a9847e7d5deaa2b8ddce45abc50deef10 Mon Sep 17 00:00:00 2001
From: Slushnas <Slushnas@users.noreply.github.com>
Date: Tue, 10 Jul 2018 20:25:57 -0700
Subject: [PATCH] Prevent divide by zero error when self.ratings is empty.

---
 TomeRater.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/TomeRater.py b/TomeRater.py
index c3fc1cb..1fc0586 100644
--- a/TomeRater.py
+++ b/TomeRater.py
@@ -65,6 +65,8 @@ def add_rating(self, rating):
             print("Invalid Rating")
 
     def get_average_rating(self):
+        if len(self.ratings) == 0:
+            return None
         sum = 0
         for rating in self.ratings:
                 sum += rating