Non Blocking Monitor in Python

#!/usr/bin/env python
# -*- coding: utf-8 -*-

from threading import Lock

class NonBlockingMonitor:
    lock = Lock()

    def __init__(self):
        pass

    def do(self, method):
        """This method does not wait on the resource. If it's available it does
        the action and returns True,
        otherwise it returns False without doing anything.

        Params:
            method      the method that must be called if no other thread
                        managed to acquire the lock."""
        if self.lock.acquire(False): # False for non blocking
            ret = method()
            self.lock.release()
            return ret
        else:
            return False