# -*- coding: utf-8 -*-
# Copyright 2018 Joseph Benden <joe@benden.us>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# pylint: disable=C0111
"""
Singleton wrapper.
.. moduleauthor:: Joseph Benden <joe@benden.us>
:copyright: (c) Copyright 2018 by Joseph Benden.
:license: Apache License 2.0, see LICENSE.txt for full details.
"""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
[docs]class Singleton(type):
"""Wrap classes to create Singleton objects."""
instance = None
def __call__(cls, *args, **kw):
"""Override object method."""
if not cls.instance:
cls.instance = super(Singleton, cls).__call__(*args, **kw)
return cls.instance