title: python: how to add 'unicodedata' module to my current python lib
body: <p>Currently I am using a python module 'requests' to handle some https issue. </p>
  
  <p>My code works well on a windows machine. But when I copy all source codes to a linux machine and run all codes, there was a feedback <code>ImportError: No module named unicodedata</code>. </p>
  
  <p>My python version is 2.7.4. But I found 'unicodedata' module first appeared in 2.5. So it is very strange why my current version doesn't include it. </p>
  
  <p>Is there any method to solve this problem without updating the python version? Or say how can I port 'unicodedata' module to my current python lib? Thanks!</p>