vmf.py 文件源码

def get_id(self, desired=-1):
        """Get a valid ID."""

        if desired == -1:
            # Start with the lowest ID, and look upwards
            desired = 1

        if desired not in self:
            # The desired ID is avalible!
            self.add(desired)
            return desired

        # Check every ID in order to find a valid one
        for poss_id in itertools.count(start=1):
            if poss_id not in self:
                self.add(poss_id)
                return poss_id