# `taurus.core.util.singleton`

This module contains a class which can be used as a super class for all classes that need to implement the Singleton design pattern.

Classes

class Singleton(*p, **k)

  This class allows Singleton objects The __new__ method is overriden to force Singleton behaviour. The Singleton is created for the lowest subclass. Usage:

      from taurus.core.util.singleton import Singleton

      class MyManager(Singleton):

          def init(self, *args, **kwargs):
              print("Singleton initialization")

  command line:

      >>> manager1 = MyManager()
      Singleton initialization

      >>> manager2 = MyManager()

      >>> print(manager1,manager2)
      <__main__.MyManager object at 0x9c2a0ec>
      <__main__.MyManager object at 0x9c2a0ec>

  Notice that the two instances of manager point to the same object even though you tried to construct two instances of MyManager.

  Warning

  although __new__ is overriden __init__ is still being called for each instance=Singleton()

  (more info)