maildir.py 文件源码

def createTempFile(self):
        attr = (os.O_RDWR | os.O_CREAT | os.O_EXCL
                | getattr(os, "O_NOINHERIT", 0)
                | getattr(os, "O_NOFOLLOW", 0))
        tries = 0
        self.fh = -1
        while True:
            self.tmpname = os.path.join(self.mbox.path, "tmp", _generateMaildirName())
            try:
                self.fh = self.osopen(self.tmpname, attr, 0600)
                return None
            except OSError:
                tries += 1
                if tries > 500:
                    self.defer.errback(RuntimeError("Could not create tmp file for %s" % self.mbox.path))
                    self.defer = None
                    return None