def rotate(self):
        """Rotate the file and create a new one.

        If it's not possible to open new logfile, this will fail silently,
        and continue logging to old logfile.
        """
        if not (os.access(self.directory, os.W_OK) and os.access(self.path, os.W_OK)):
            return
        newpath = (self.path, self.suffix(self.lastDate)) % "%s.%s"
        if os.path.exists(newpath):
            return
        self._file.close()
        os.rename(self.path, newpath)
        self._openFile()
dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/python/logfile.py/DailyLogFile.rotate/swapped operands of `%`