Seeking python script that can give the Hash for signing for inputs in a tx

[lungbubble]

I'm looking for a python script I can run (assuming there isn't already an online api or something) that will give me the hashes for signing for all the inputs in a transaction (and place them in a file) when I input the given txid.  It looks like blockcypher.com has all the api's and stuff available to provide the info to a given python script, but I can't, for the life of me, write the script.  I am not looking to make manual tx's, I'm looking to get the hashofthingtosign for existing transactions.  I am open to paying if I have to to do do this, though I am unsure as to how much it would really run etc.  Funny thing is, to those who are familiar with it, it seems as though its simple to them.  Go figure.