From f83f0faa1f2c8f06dc04d2d6de315a7b35f1c361 Mon Sep 17 00:00:00 2001
From: Armin Friedl <dev@friedl.net>
Date: Tue, 27 Oct 2020 03:19:01 +0100
Subject: [PATCH] Fix Cache singleton

---
 countdown/countdown.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/countdown/countdown.py b/countdown/countdown.py
index dd3ed89..107fb33 100644
--- a/countdown/countdown.py
+++ b/countdown/countdown.py
@@ -14,8 +14,8 @@ class Cache:
         return Cache.__instance
 
     def __init__(self):
-        if Cache.__instance is None:
-            raise Exception("Cache is a singleton. Use Cache.getInstance()")
+        if Cache.__instance is not None:
+            raise Exception("Cache is a singleton. Use Cache.get_instance()")
         Cache.__instance = self
         self.db = Walrus(host='localhost', port=6379, db=0)