title: How to install python packages from whl files
body: <p>I have downloaded <code>pycairo</code> from this <a href="http://www.lfd.uci.edu/~gohlke/pythonlibs/#pycairo" rel="nofollow noreferrer">web-page</a> and tried to install it with <code>pip</code>:</p>
  
  <pre><code>pip install pycairo-1.10.0-cp27-cp27m-win_amd64.whl
  </code></pre>
  
  <p>Which returned:</p>
  
  <pre><code>pycairo-1.10.0-cp27-cp27m-win_amd64.whl is not a supported wheel on this platform.
  Storing debug log for failure in C:\Users\user\pip\pip.log
  </code></pre>
  
  <p><code>pip.log</code> shows this:</p>
  
  <pre><code>------------------------------------------------------------
  C:\Python27\Scripts\pip run on 11/05/16 10:46:49
  pycairo-1.10.0-cp27-cp27m-win_amd64.whl is not a supported wheel on this platform.
  Exception information:
  Traceback (most recent call last):
    File "C:\Python27\lib\site-packages\pip\basecommand.py", line 122, in main
      status = self.run(options, args)
    File "C:\Python27\lib\site-packages\pip\commands\install.py", line 257, in run
      InstallRequirement.from_line(name, None))
    File "C:\Python27\lib\site-packages\pip\req.py", line 167, in from_line
      raise UnsupportedWheel("%s is not a supported wheel on this platform." % wheel.filename)
  UnsupportedWheel: pycairo-1.10.0-cp27-cp27m-win_amd64.whl is not a supported wheel on this platform.
  </code></pre>
  
  <p>I checked supported pip tags using:</p>
  
  <pre><code>import pip
  print pip.pep425tags.get_supported()
  </code></pre>
  
  <p>The output was:</p>
  
  <pre><code>[('cp27', 'none', 'win_amd64'), ('cp27', 'none', 'any'), ('cp2', 'none', 'any'), ('cp26', 'none', 'any'), ('cp25', 'none', 'any'), ('cp24', 'none', 'any'), ('cp23', 'none', 'any'), ('cp22', 'none', 'any'), ('cp21', 'none', 'any'), ('cp20','none', 'any'), ('py27', 'none', 'any'), ('py2', 'none', 'any'), ('py26', 'none', 'any'), ('py25', 'none', 'any'), ('py24', 'none', 'any'), ('py23', 'none', 'any'), ('py22', 'none', 'any'), ('py21', 'none', 'any'), ('py20', 'none', 'any')]
  </code></pre>
  
  <p>Since <code>('cp27', 'none', 'win_amd64')</code> is listed there, I expect to install <code>pycairo-1.10.0-cp27-cp27m-win_amd64.whl</code> with no problem, but I can't. Is there anything else which I miss?</p>