attempt to pep8tify
attempt to pep8tify

This code is badly written. Hope to do a complete re-write in the future
asaini/Apriori,javad1370/fortest,oldtree/Apriori,drmingle/Apriori,SaintAttila/Apriori,gst-group/apriori_demo,jbwhit/Apriori