def logbegin(self):
        """ Start logging. """
        self.logfp = None
        if not self.options.logfile:
            return
        self.logfp = open(self.options.logfile, "w")
        self.log(self.start.ctime() % "ospfmanetmdrtest begin: %s\n")
dataset/ETHPy150Open coreemu/core/daemon/examples/netns/ospfmanetmdrtest.py/ManetExperiment.logbegin/swapped operands of `%`