open file in python without file's full name?

Question

I am trying to execute f = open('filename') in python. However, I dont know the full name of the file. All I know is that it starts with 's12' and ends with '.ka',I know the folder where it's located, and I know it is the only file in that folder that starts and ends with "s12" and ".ka". Is there a way to do this?

Answer 1

Glob is your friend:

from glob import glob
filename = glob('s12*.ka')[0]

Careful though, glob returns a list of all files matching this pattern so you might want to assert that you get the file you actually want somehow.