diff options
Diffstat (limited to 'app/utils/singleton.py')
| -rw-r--r-- | app/utils/singleton.py | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/app/utils/singleton.py b/app/utils/singleton.py new file mode 100644 index 0000000..fc1147f --- /dev/null +++ b/app/utils/singleton.py @@ -0,0 +1,16 @@ +############################################################################### +# Copyright (c) 2017 Koren Lev (Cisco Systems), Yaron Yogev (Cisco Systems) # +# and others # +# # +# All rights reserved. This program and the accompanying materials # +# are made available under the terms of the Apache License, Version 2.0 # +# which accompanies this distribution, and is available at # +# http://www.apache.org/licenses/LICENSE-2.0 # +############################################################################### +class Singleton(type): + _instances = {} + + def __call__(cls, *args, **kwargs): + if cls not in cls._instances: + cls._instances[cls] = super(Singleton, cls).__call__(*args, **kwargs) + return cls._instances[cls] |