human
Complete the below
def get_trainer_with_mock_updater(stop_trigger=(10, 'iteration'), iter_per_epoch=10):

    ''''Returns a :class:`~chainer.training.Trainer` object with mock updater.
    The returned trainer can be used for testing the trainer itself and the
    extensions. A mock object is used as its updater. The update function set
    to the mock correctly increments the iteration counts (
    ``updater.iteration``), and thus you can write a test relying on it.
    Args:
    stop_trigger: Stop trigger of the trainer.
    iter_per_epoch: The number of iterations per epoch.
    Returns:
    Trainer object with a mock updater.'
    '''
assistant
#Here is the Python code you requested.
    updater = mock.Mock()
    updater.get_all_optimizers.return_value = {}
    updater.iteration = 0
    updater.epoch = 0
    updater.epoch_detail = 0
    updater.is_new_epoch = True
    updater.previous_epoch_detail = None
    def update():
        updater.update_core()
        updater.iteration += 1
        updater.epoch = (updater.iteration // iter_per_epoch)
        updater.epoch_detail = (updater.iteration / iter_per_epoch)
        updater.is_new_epoch = (((updater.iteration - 1) // iter_per_epoch) != updater.epoch)
        updater.previous_epoch_detail = ((updater.iteration - 1) / iter_per_epoch)
    updater.update = update
    trainer = training.Trainer(updater, stop_trigger)
    return trainer