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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def train(self, **kwargs):
 """ Do the workflow training """

        log.info("Starting to train...")
        if not self.setup_run:
            self.setup()
        self.trained_tasks = []
        for task in self.tasks:
            data = self.reformatted_input[task.data_format]['data']
            target = self.reformatted_input[task.data_format]['target']
            if data is None:
                raise Exception("Data cannot be none.  Check the config file to make sure the right input is being read.")
            kwargs['data']=data
            kwargs['target']=target
            trained_task = self.execute_train_task_with_dependencies(task, **kwargs)
            self.trained_tasks.append(trained_task)
            #If the trained task alters the data in any way, pass it down the chain to the next task
            if hasattr(trained_task, 'data'):
                self.reformatted_input[task.data_format]['data'] = trained_task.data
        log.info("Finished training.")