ImportError: No module named treq

[sagarawasthi]

Traceback (most recent call last):
File "Betfair.py", line 5, in
from betfair import Betfair
File "C:\Python27\lib\site-packages\betfair.py-0.1.3-py2.7.egg\betfair__init__.py", line 3, in
from .betfair import Betfair
File "C:\Python27\lib\site-packages\betfair.py-0.1.3-py2.7.egg\betfair\betfair.py", line 14, in
from network import Network
File "C:\Python27\lib\site-packages\betfair.py-0.1.3-py2.7.egg\betfair\network.py", line 1, in
import treq
ImportError: No module named treq

Any idea what is missing?