Python 2.7, Help with lists [AUD ONLY!]

So I have a small script, what it does is makes a requests, reads the pages data and will create/append to a text document with data if certain text is found. What I'd like, instead of it saving the .txt files as the IDs from the list, instead allow me to give each ID it's own name so I can sort through them faster. Below will be my current script for this: IDs= ['1012880', '1012140', '1013750', '1011700', '1012910', '1010150', '1011620', '1010050', '1007830', '1011120', '1014950', '1010420', '1014920'] url = 'url here' r = [login to view URL](url, headers=headers) Sa = [c for c in checklist if c in [login to view URL]] f = open([login to view URL]('dir', str(Sa) + '.txt'), 'a') [login to view URL](str(d) + '\n') [login to view URL](str(d) + '\n') [login to view URL](str(d) + '\n') [login to view URL]() print Sa Where it opens the file and saves to it here "f = open([login to view URL]('dir', str(Sa) + '.txt'), 'a')" where it says "str(Sa)" that saves the file as a name, depending on what IDs it finds within the page its self. I'd like to be able to save the files as custom names instead of the IDs. Any help would be appreciated!