problem in running eval.py program

[srinathdwivedi]

i tried to run eval.py after following all steps as given in READ.me
but i am facing following error:
Traceback (most recent call last):
File "/home/srinath/RE/cnn-relation-extraction-master/eval.py", line 122, in
tf.app.run()
File "/home/srinath/anaconda3/lib/python3.6/site-packages/tensorflow/python/platform/app.py", line 48, in run
_sys.exit(main(_sys.argv[:1] + flags_passthrough))
File "/home/srinath/RE/cnn-relation-extraction-master/eval.py", line 118, in main
eval()
File "/home/srinath/RE/cnn-relation-extraction-master/eval.py", line 80, in eval
batches = data_helpers.batch_iter(list(x_eval), FLAGS.batch_size, 1, shuffle=False)
File "/home/srinath/anaconda3/lib/python3.6/site-packages/tensorflow/python/platform/flags.py", line 50, in getattr
raise AttributeError(name)
AttributeError: batch_size
may i know how to resolve it