message: [Keras]: minor fix callbacks
diff: @@ -307,7 +307,7 @@ class BaseModel(object):
  for iter in range(0, int(iterations)):
  if callbacks != None:
  for callback in callbacks:
  - callback.on_batch_begin(batch)
  + callback.on_batch_begin(iter)
  for dataloader in self._input_dataloaders:
  dataloader.next_batch(self._ffmodel)
  @@ -325,11 +325,11 @@ class BaseModel(object):
  if callbacks != None:
  for callback in callbacks:
  - callback.on_batch_end(batch)
  + callback.on_batch_end(iter)
  if callbacks != None:
  for callback in callbacks:
  - callback.on_epoch_end()
  + callback.on_epoch_end(epoch)
  ts_end = self._ffconfig.get_current_time()
  run_time = 1e-6 * (ts_end - ts_start);
  @@ -337,7 +337,7 @@ class BaseModel(object):
  if callbacks != None:
  for callback in callbacks:
  - callback.on_train_end(epoch)
  + callback.on_train_end()
  self._input_tensors[0].ffhandle.inline_map(self._ffconfig)
  input_array = self._input_tensors[0].ffhandle.get_flat_array(self._ffconfig, ff.DataType.DT_FLOAT)
  