Install python:

sudo apt-get install python python-dev python-setuptools build-essentials

Versions:

python and python-dev - 2.7.2-7ubuntu2
python-setuptools - 0.6.16-1


Install nltk 2.0

sudo easy_install pip
sudo pip install numpy --upgrade
sudo pip install nltk --upgrade

Install Elixir 0.7.1
sudo easy_install Elixir

Install PyEnchant

sudo pip install PyEnchant --upgrade

sudo apt-get install libblas-dev liblapack-dev libatlas3gf-base 
sudo pip install scipy --upgrade
sudo apt-get install libamd2.2.0 libblas3gf libc6 libgcc1 libgfortran3 liblapack3gf libumfpack5.4.0 libstdc++6 build-essential gfortran libatlas-base-dev python-all-dev
sudo pip install argparse --upgrade


python train_classifier.py --algorithm NaiveBayes --instances files --min_score 3 --ngrams 1 --ngrams 2 movie_reviews