def lr_schedule0(epoch):
    """Learning Rate Schedule
    Learning rate is scheduled to be reduced after 10, 20, 30, 40 epochs.
    Called automatically every epoch as part of callbacks during training.
    # Arguments
        epoch (int): The number of epochs
    # Returns
        lr (float32): learning rate
    """
    lr = 1e-1
    if epoch > 180:
        lr *= 0.5e-3
    elif epoch > 160:
        lr *= 1e-3
    elif epoch > 120:
        lr *= 1e-2
    elif epoch > 10:
        lr *= 1e-1
    print('Learning rate: ', lr)
    return lr