nltk.download() hangs on OS X
Question: `nltk.download()` is hanging for me on OS X. Here is what happens:

    
    
    $python
    >>> Python 2.7.2 (default, Oct 11 2012, 20:14:37) 
    >>> [GCC 4.2.1 Compatible Apple Clang 4.0 (tags/Apple/clang-418.0.60)] on darwin
    >>> import nltk
    >>> nltk.download()
    
    showing info http://nltk.github.com/nltk_data/
    

After that, it completely freezes.

I installed everything according to [the ntlk install
page](http://nltk.org/install.html). I'm on OS X 10.8.3. On my Linux box, it
just works with no problems.

Any ideas?


Answer: Try running `nltk.download_shell()` instead as there is most likely an issue
displaying the downloader UI. Running the `download_shell()` function will
bypass it.

