CODE EXAMPLE FOR PYTHON

python singleton module

# mymodule.py

__all__ = ["mysingleton"]

class __MySingletonLike(object):
    def __init__(self):
        self._variable = 42

    @property
    def variable(self):
        return self._variable

    @variable.setter
    def variable(self, value):
        check_value(value) # imaginary validation
        self._variable = value


mysingleton = __MySingleton()