If you are planning on making an upvote script, I can give you more, better, information as this is going to be a series of posts in an attempt to show people some of the hacky ways that I made my bot and the problems I went through to make it. I would tell you to read the documentation for steem-python but... most of it either has nothing on usage or no description at all and it is very very... limited in my opinion. I am certain I am not alone in saying that if you have experience with programming it would probably be better to ask someone directly over reading that documentation.