berpress/swagger-coverage

class Singleton(type):
    """
    Singleton class
    """

    _instances = {}

    def __call__(cls, *args, **kwargs):
        if cls not in cls._instances:
            cls._instances[cls] = super(Singleton, cls).__call__(*args, **kwargs)
        return cls._instances[cls]

    def clear(cls):
        cls._instance = None