max_num_epchs and steps in config

[mc171819]

hi, I am really confused about the max_num_epochs=160 and steps=30950 in yourt car.fhd.config. It seems that I train the code following the steps=3.950 but not max_num_epochs. So how can I use the epoch number to train the model rather than steps?

by the way, if i change the batch_size, should i change the steps_num as well?