title: python -m pip install --upgrade pip does not work
body: <p>Upgrading pip does not do anything, just tells me to upgrade Pip again and that the requirements are satisfied--however, I am on an old pip version. This is Python27, I get the same issue whether I am in a virtual environment or not.</p>
  
  <p><strong>Output:</strong></p>
  
  <pre><code>C:\Python27&gt;python -m pip install --upgrade pip
  
  Requirement already up-to-date: pip in c:\python27\lib\site-packages
  
  You are using pip version 9.0.1, however version 19.1.1 is available.
  You should consider upgrading via the 'python -m pip install --upgrade pip' command.
  </code></pre>
  
  <p><strong>Versions Installed:</strong></p>
  
  <pre><code>    $ pip --version
      pip 9.0.1 from c:\python27\lib\site-packages (python 2.7)
  
      $ pip --version
      pip 9.0.1 from c:\users\aroytikh\dev\flask-tutorial\venv\lib\site- 
      packages (python 2.7)
      (venv)
  </code></pre>