title: Python 2.7.5 getting import OrderedDict ImportError: No module named OrderedDict
body: <p>import OrderedDict
  ImportError: No module named OrderedDict</p>
  
  <p>i'm using python 2.7.5 and assume orderedDict module to be pre-installed.
  How can i check if the module is present and if not how can i install it.</p>
  
  <p>I'm beginner and thanks for helping me out.</p>