def acquire(self):
        """
        Acquire next available Fid
        """
        if len(self.fids) < 1:
            raise NoFidError()
        return Fid(self.fids.pop(0), self.iounit)
dataset/ETHPy150Open svinota/py9p/py9p/fuse9p.py/FidCache.acquire/original