running on a mac:

install virtualenv

sudo easy_install pip
sudo pip install virtualenv

create a virtualenv called scrapy

virtualenv scrapy

activate the virtualenv (navigate to where your virtualenv is, usually ~/.virtualenvs/<name_of_virtualenv>

source bin/activate

clone this repo

git clone https://github.com/mancdaz/scrapy-heaver/

install scrapy and requirements

cd scrapy-heaver
pip install -r requirements.txt

run your desired spider (select output type using filename extension)

scrapy crawl snickers -o snickers.json
scrapy crawl snickers -o snickers.csv

<lots of output>