title: PIP (Python) : ImportError: cannot import name _remove_dead_weakref
body: <p>I am getting below error, I have search lot around but haven't been able to find a good fix-  Please anyone who was getting this kind of error and resolved. please help.  </p>
  
  <pre><code>File "c:\python27\lib\runpy.py", line 174, in _run_module_as_main
     "__main__", fname, loader, pkg_name)
   File "c:\python27\lib\runpy.py", line 72, in _run_code
     exec code in run_globals
   File "C:\python27\Tools\Scripts\pip.exe\__main__.py", line 5, in &lt;module&gt;
   File "c:\python27\lib\site-packages\pip\__init__.py", line 5, in &lt;module&gt;
     import logging
   File "c:\python27\lib\logging\__init__.py", line 26, in &lt;module&gt;
     import sys, os, time, cStringIO, traceback, warnings, weakref, collections
   File "c:\python27\lib\weakref.py", line 14, in &lt;module&gt;
     from _weakref import (
  ImportError: cannot import name _remove_dead_weakref
  </code></pre>