Singleton destructor for unit testing in Python -

i need implement singleton pattern in python (2.7) , cover code unit tests.

below code use:

class singleton(object):     def __new__(cls):         if not hasattr(cls, 'instance'):              cls.instance = super(singleton, cls).__new__(cls)         return cls.instance 

for unit tests independent, need implement destructor class. how can done?

you can delete instance attribute:

del singleton.instance 

if subclassing this, make class method:

@classmethod def clear_instance(cls):     del cls.instance