title: Error: "Traceback (most recent call last):"
body: <p>I'm trying to install <code>pip</code> to my pycharm, I'm using Mac OS X version 10.11.1 </p>
  
  <p>I tried: <code>pip install --upgrade pip</code></p>
  
  <p>Then I get:</p>
  
  <pre><code>Traceback (most recent call last):
    File "/usr/local/bin/pip", line 5, in &lt;module&gt;
  from pkg_resources import load_entry_point
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources.py", line 2793, in &lt;module&gt;
  working_set.require(__requires__)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources.py", line 673, in require
  needed = self.resolve(parse_requirements(requirements))
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources.py", line 576, in resolve
  raise DistributionNotFound(req)
  pkg_resources.DistributionNotFound: pip==7.1.0
  </code></pre>
  
  <p>I'm stuck a few days.</p>