cannot import name 'lookup_ops' from 'tensorflow.python.ops'

[dhiraj-lochib]

Anyone Help me to get rid out of this error

Traceback (most recent call last):
File "d:\molly\database\nmt-chatbot\train.py", line 8, in
from nmt import nmt
File "D:\molly\database\nmt-chatbot/nmt\nmt\nmt.py", line 28, in
from . import inference
File "D:\molly\database\nmt-chatbot/nmt\nmt\inference.py", line 24, in
from . import attention_model
File "D:\molly\database\nmt-chatbot/nmt\nmt\attention_model.py", line 22, in
from . import model
File "D:\molly\database\nmt-chatbot/nmt\nmt\model.py", line 27, in
from . import model_helper
File "D:\molly\database\nmt-chatbot/nmt\nmt\model_helper.py", line 26, in
from tensorflow.python.ops import lookup_ops
ImportError: cannot import name 'lookup_ops' from 'tensorflow.python.ops' (unknown location)