python - What shall I do to solve this error? ImportError: No module named requests.structures -

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I'm trying to run a scrappy project in Pyro 2.7 but I have that problem. I had other problems but I got them Solved with sudo pip installation ... I looked at Google but could not find a solution to this problem.

have you installed the library? 

  sudo pip installation request   
  requests.structures  There is just one module in that package.

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