How to use the pastepwn.util.request.Request._instance function in pastepwn

def __new__(cls, *args, **kwargs):
        # override method to implement singleton
        # source: http://alacret.blogspot.com/2015/04/python-thread-safe-singleton-pattern.html
        if Request._instance is None:
            with Request._lock:
                if Request._instance is None:
                    Request._instance = super(Request, cls).__new__(cls)
        return Request._instance

def __new__(cls, *args, **kwargs):
        # override method to implement singleton
        # source: http://alacret.blogspot.com/2015/04/python-thread-safe-singleton-pattern.html
        if Request._instance is None:
            with Request._lock:
                if Request._instance is None:
                    Request._instance = super(Request, cls).__new__(cls)
        return Request._instance

def __new__(cls, *args, **kwargs):
        # override method to implement singleton
        # source: http://alacret.blogspot.com/2015/04/python-thread-safe-singleton-pattern.html
        if Request._instance is None:
            with Request._lock:
                if Request._instance is None:
                    Request._instance = super(Request, cls).__new__(cls)
        return Request._instance