title: Numpy backwards compatibility: Visual C++ 9 not found
body: <p>I downloaded numpy-1.10.1 from sourceforge and I have Python 2.7. I extracted, renamed and entered the numpy directory under site-packages. I ran the</p>
  
  <pre><code>python setup.py install
  </code></pre>
  
  <p>command, and got <a href="https://www.scribd.com/doc/292695757/Error-Message" rel="nofollow noreferrer">this error message</a>. I have Microsoft Visual C++ 2013 Redistributable, and it's asking for version 9.</p>
  
  <pre><code>C:\Python27\Lib\site-packages\numpy
  $ python setup.py install
  
  [lots of text]
  error: Microsoft Visual C++ 9.0 is required (Unable to find vcvarsall.bat) Get it from http://aka.ms/vcpython27
  </code></pre>
  
  <p>Why isn't it backward compatible?</p>