1 files changed, 1 insertions, 1 deletions
diff --git a/Demo/classes/Dbm.py b/Demo/classes/Dbm.py
index ecc117d..617fe99 100755
--- a/Demo/classes/Dbm.py
+++ b/Demo/classes/Dbm.py
@@ -50,7 +50,7 @@ def test():
                 value = d[key]
                 print('currently:', value)
             value = eval(input('value: '))
-            if value == None:
+            if value is None:
                 del d[key]
             else:
                 d[key] = value