Installing NLTK
===============

NLTK requires Python versions 2.6-2.7.
(A version supporting Python 3 is under development, see http://nltk.org/nltk3-alpha/).

Mac/Unix
--------

#. Open ``Finder>Applications>Utilities>Terminal`` and type ``python -V`` to find out what version of Python is installed
#. Install Setuptools: Download the corresponding version of Setuptools from
   http://pypi.python.org/pypi/setuptools (scroll to the bottom, and pick the filename that contains the right version number and which has the extension .egg).  Install it by typing ``sudo sh Downloads/setuptools-...egg``, giving the location of the downloaded file.
#. Install Pip: run ``sudo easy_install pip``
#. Install Numpy (optional): run ``sudo pip install -U numpy``
#. Install PyYAML and NLTK: run ``sudo pip install -U pyyaml nltk``
#. Test installation: run ``python`` then type ``import nltk``

Windows
-------

These instructions assume that you do not already have Python installed on your machine.
If you do, you can skip to the final step and just install NLTK.

32-bit binary installation
~~~~~~~~~~~~~~~~~~~~~~~~~~

#. Install Python: http://www.python.org/download/releases/2.7.3/
#. Install Numpy (optional): http://sourceforge.net/projects/numpy/files/NumPy/1.6.2/numpy-1.6.2-win32-superpack-python2.7.exe
#. Install NLTK: http://pypi.python.org/pypi/nltk
#. Install PyYAML: http://pyyaml.org/wiki/PyYAML
#. Test installation: ``Start>Python27``, then type ``import nltk``

Source installation (for 32-bit or 64-bit Windows)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

#. Install Python: http://www.python.org/download/releases/2.7.3/
#. Install Numpy (optional): http://www.lfd.uci.edu/~gohlke/pythonlibs/#numpy
#. Install Setuptools: http://pypi.python.org/packages/2.7/s/setuptools/setuptools-0.6c11.win32-py2.7.exe
#. Install Pip: ``Start>Run... c:\Python27\Scripts\easy_install pip``
#. Install PyYAML and NLTK: ``Start>Run... c:\Python27\Scripts\pip install pyyaml nltk``
#. Test installation: ``Start>All Programs>Python27>IDLE``, then type ``import nltk``

