[Ndn-interest] Waf errors

[Lee, Jongdeog]

Hi,

  Does anybody know why I got this error when I do "./waf configure"?
  I am using a Centos machine and I do have the sudo authority.


===================================================

Traceback (most recent call last):

  File "./waf", line 163, in ?

    from waflib import Scripting

  File "/home/tarek/jlee700/ndn-cxx/.waf-1.8.5-d178df7a9bb732db109001d6b461550f/waflib/Scripting.py", line 6, in ?

    from waflib import Utils,Configure,Logs,Options,ConfigSet,Context,Errors,Build,Node

  File "/home/tarek/jlee700/ndn-cxx/.waf-1.8.5-d178df7a9bb732db109001d6b461550f/waflib/Utils.py", line 7, in ?

    from collections import deque,defaultdict

ImportError: cannot import name defaultdict

===================================================

  Any advice would be appreciated.

Best wishes,
Jongdeog Lee (JD)

------------------------------------------------
Ph.D. Student
Department of Computer Science
University of Illinois at Urbana-Champaign
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