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

NLTK requires Python versions 2.6-2.7.
(A version supporting Python 3 is available at http://nltk.org/nltk3-alpha/).

Mac/Unix
--------

#. Install Setuptools: http://pypi.python.org/pypi/setuptools
#. 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
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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/ (avoid the 64-bit versions)
#. 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``