install virtualenv

# Install Homebrew
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
# Install python (& pip)
brew install python;
pip install virtualenv;

#clone the repo
cd ~;
git clone git@github.com:Geniushjs/LintCode.git;
cd LintCode;

# Create Virtual environment:
virtualenv env;

# Activate the environment
. env/bin/activate;

# Install necessary packages
pip install -r requirements.txt

# You are all set at this point. 
Add . env/bin/activate; to your bash_profile alias, so that next time you can easily start env; 
Mine is: alias lintcode="cd ~/LintCode;. env/bin/activate"
You should be able to do python manage.py runserver;