timing_luigi_mixin.py

class TimingMixin():
    start_time = None 
    end_time = None 
    exec_time = None 

    @luigi.Task.event_handler(luigi.Event.DEPENDENCY_DISCOVERED)
    def save_start_time(self):
        self.start_time = time.time()
        self.log("Dependency present. Starting task")

    @luigi.Task.event_handler(luigi.Event.SUCCESS)
    def save_end_time(self):
        self.end_time = time.time()
        import pdb; pdb.set_trace()
        self.exec_time = time.strftime('%H:%M:%S', time.gmtime(self.end_time - self.start_time))
        self.log("Task succeded. Time executed (H:M:S): " + self.exec_time)