singleton.py

class Borg:
    
    """The Borg design pattern"""
    """Borg class making class attributes global"""
    _shared_state = {} # Attribute dictionary

    def __init__(self):
        # Make it an attribute dictionary
        self.__dict__ = self._shared_state

class Singleton(Borg): 
    
    """The singleton class"""
    """This class now shares all its attributes among its various instances"""
    # This essentially makes the singleton objects an object-oriented global variable

    def __init__(self, **kwargs):
        Borg.__init__(self)
        #Update the attribute dictionary by inserting a new key-value pair
        self._shared_state.update(kwargs)

    def __str__(self):
        # Returns the attribute dictionary for printing
        return str(self._shared_state)


x = Singleton(HTTP="Hyper Text Transfer Protocol")
print(x)

y = Singleton(SNMP = "Simplle Network Management Protocol")
print(y)