text_classification reader error

[wanghaoshuang]

Get follow error log while running train.py of text_classification model:

[INFO 2017-11-16 17:19:51,458 train.py:44] please wait to build the word dictionary ...
[INFO 2017-11-16 17:20:07,138 train.py:101] length of word dictionary is : 5147.
I1116 17:20:07.168130 24638 Util.cpp:166] commandline:  --use_gpu=False --trainer_count=1
I1116 17:20:07.176143 24638 GradientMachine.cpp:94] Initing parameters..
I1116 17:20:07.186369 24638 GradientMachine.cpp:101] Init parameters done.
Traceback (most recent call last):
  File "train.py", line 178, in <module>
    main(args)
  File "train.py", line 169, in main
    model_save_dir=args.model_save_dir)
  File "train.py", line 150, in train
    num_passes=num_passes)
  File "/home/work/wanghaoshuang/paddle/python/install/lib/python2.7/site-packages/paddle/v2/trainer.py", line 162, in train
    for batch_id, data_batch in enumerate(reader()):
  File "/home/work/wanghaoshuang/paddle/python/install/lib/python2.7/site-packages/paddle/v2/minibatch.py", line 33, in batch_reader
    for instance in r:
  File "/home/work/wanghaoshuang/paddle/python/install/lib/python2.7/site-packages/paddle/v2/reader/decorator.py", line 67, in data_reader
    for e in reader():
TypeError: 'function' object is not iterable