Created by: gongweibao

PR types

New features

PR changes

APIs

Describe

Automatic checkpoint is used under two scenes:

1. When user use auto_checkpoint.train_epoch_range:

import paddle.fluid.incubate.auto_checkpoint as acp
for i in acp.train_epoch_range(3):
      for data in data_loader():
            exe.run(program, data, fetch)

2. Otherwise it useful when user use DataLoader.from_generator

data_loader=DataLoader.from_generator(reader)
for i in range(3):
      for data in data_loader():
            exe.run(program, data, fetch)

It's only used on paddlecloud platform now.