first commit

1 files changed, 25 insertions, 0 deletions

diff --git a/src/singleton.py b/src/singleton.py
new file mode 100644
index 00000000..4390bc0e
--- /dev/null
+++ b/src/singleton.py
@@ -0,0 +1,25 @@
+# -*- coding: utf-8 -*-
+
+# Copyright 2009, 2010 Erwan Briand
+# Copyright 2010, Florent Le Coz <louizatakk@fedoraproject.org>
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation version 3 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+class Singleton(object):
+    """ Canonic Singleton implementation.
+    """
+    _instance = None
+    def __new__(cls, *args, **kwargs):
+        if cls._instance is None:
+            cls._instance = super(Singleton, cls).__new__(cls, *args, **kwargs)
+        return cls._instance