title: psycopg2 Installation: ValueError: [u'path']
body: <p>While attempting to install the Postgres driver for Django on my Windows 7 (64-bit) box, the process fails with a lot of output followed by this error:</p>
  
  <pre><code>File "C:\Python27\lib\distutils\msvc9compiler.py", line 299, in query_vcvarsall
  
  raise ValueError(str(list(result.keys())))
  
  ValueError: [u'path']
  </code></pre>
  
  <p>The installation command is </p>
  
  <pre><code>pip install psycopg2
  </code></pre>
  
  <p>Can you help me to understand and correct this error?</p>
  
  <p>Full output is here: <a href="http://pastebin.com/BhLGe4Ti" rel="nofollow">http://pastebin.com/BhLGe4Ti</a></p>