Singleton

singleton(cls)

Decorator to make a class a Singleton class (only one instance), using closure.

Source code in agentuniverse/base/annotation/singleton.py

Python

def singleton(cls):
    """Decorator to make a class a Singleton class (only one instance), using closure."""
    instances = {}

    @wraps(cls)
    def get_instance(*args, **kwargs):
        if cls not in instances:
            instances[cls] = cls(*args, **kwargs)
        return instances[cls]

    return get_instance