There seem to be many ways to define singletons in Python. Is there a consensus opinion on Stack Overflow?

There seem to be many ways to define singletons in Python. Is there a consensus opinion on Stack Overflow?

Is there a way to set up a global variable inside of a module? When I tried to do it the most obvious way as appears below, the Python interpreter said the variable __DBNAME__ did not exist. ... __DBNAME__ = None def initDB(name): if not __DBNAME__:...

Few years ago I found an implementation of the Singleton pattern in Python by Duncan Booth: class Singleton(object): """ Singleton class by Duncan Booth. Multiple object variables refers to the same object. http://web.archive.org/web/2009...

This question is not for the discussion of whether or not the singleton design pattern is desirable, is an anti-pattern, or for any religious wars, but to discuss how this pattern is best implemented in Python in such a way that is most pythonic. In this ...

class Singleton(type): def __init__(self, *args, **kwargs): print 'calling __init__ of Singleton class', self print 'args: ', args print 'kwargs: ', kwargs super(Singleton, self).__init__(*args, **kwargs) self._...