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Diffstat (limited to 'poezio/singleton.py')
| -rw-r--r-- | poezio/singleton.py | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/poezio/singleton.py b/poezio/singleton.py new file mode 100644 index 00000000..9133012b --- /dev/null +++ b/poezio/singleton.py @@ -0,0 +1,20 @@ +# Copyright 2010-2011 Florent Le Coz <louiz@louiz.org> +# +# This file is part of Poezio. +# +# Poezio is free software: you can redistribute it and/or modify +# it under the terms of the zlib license. See the COPYING file. + +""" +Defines a Singleton function that initialize an object +of the given class if it was never instantiated yet. Else, returns +the previously instantiated object. +This method is the only one that I can come up with that do not call +__init__() each time. +""" + +instances = {} +def Singleton(cls, *args, **kwargs): + if not cls in instances: + instances[cls] = cls(*args, **kwargs) + return instances[cls] |