print problem

(cv) jalal@klein:~/computer_vision/py-faster-rcnn$ ./tools/demo.py
Traceback (most recent call last):
  File "./tools/demo.py", line 18, in <module>
    from fast_rcnn.test import im_detect
  File "/home/jalal/computer_vision/py-faster-rcnn/tools/../lib/fast_rcnn/test.py", line 286
    print 'im_detect: {:d}/{:d} {:.3f}s {:.3f}s' \
                                               ^
SyntaxError: Missing parentheses in call to 'print'