I'm attempting to bring in a range of files - all with a similar name but that have different numbered endings, to work with in a function.

I'm trying to use with open('files' ..... ) as data:
then to work on them but I'm unsure if there is a way to do this without bringing them all in manually. 

Is there a way of say, pattern matching on them all so I can work on them all one by one but in the same way?