pyTCore/pytcore/util/seeded_random.py

#  Copyright 2023 Modelling, Simulation and Design Lab (MSDL)
#  at the University of Antwerp (http://msdl.uantwerpen.be/).
#
#  Licensed under the GNU Public License v3 (the "License");
#  you may not use this file except in compliance with the
#  License. You may obtain a copy of the License at
#     https://www.gnu.org/licenses/gpl-3.0.en.html
#
#   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.

import random

class SeededRandom(random.Random):
    '''
        Random class wrapper, provided a seeded random number generator
    '''
    __instantiated = False
    def __init__(self, seed=0):
        '''
            Singleton class: the single instance "INFINITY" stands for infinity.
        '''
        if SeededRandom.__instantiated:
            raise NotImplementedError("singleton class already instantiated")

        SeededRandom.__instantiatiated = True
        random.Random.__init__(self)
        self.seed(seed)


Random = SeededRandom()