title: setup.py not installing data files
body: <p>I have a Python library that, in addition to regular Python modules, has some data files that need to go in /usr/local/lib/python2.7/dist-package/mylibrary.</p>
  
  <p>Unfortunately, I have been unable to convince setup.py to actually install the data files there. Note that this behaviour is under install - not sdist.</p>
  
  <p>Here is a slightly redacted version of setup.py</p>
  
  <pre><code>module_list = list_of_files
  
  setup(name         ='Modules',
        version      ='1.33.7',
        description  ='My Sweet Module',
        author       ='PN',
        author_email ='email',
        url          ='url',
        packages     = ['my_module'],
  
  # I tried this. It got installed in /usr/my_module. Not ok.
  
        # data_files   = [ ("my_module",  ["my_module/data1",
        #                                  "my_module/data2"])]
  
  # This doesn't install it at all.
        package_data = {"my_module" : ["my_module/data1",
                                       "my_module/data2"] }
       )
  </code></pre>
  
  <p>This is in Python 2.7 (will have to run in 2.6 eventually), and will have to run on some Ubuntu between 10.04 and 12+. Developing it right now on 12.04.</p>