Singleton in python

If you wish to have a singleton class, you can achive it by implementing a decorator:

def singleton(*args, **kwargs):
 def initalizer(cls):
 instances = {}
 def getinstance():
 if cls not in instances:
 instances[cls] = cls(*args, **kwargs)
 return instances[cls]
 return getinstance()
 return initalizer

Now you can use it like this:

@singleton(10)
class MyClass:

 def __init__(self, something):
 self.inner = something

 def me(self):
 print self.inner

All the arguments provided in the sigleton decorator will be used to initalize a class. And you can use it like this

MyClass.me()