How to read in all text files from UNIX bash directory in Cloudera's Python API

I'm still pretty new to Cloudera and using the UNIX environment. I have written a mapper that reads in .txt files from a directory in my Windows system, which works just fine. I read files in like this:

import glob
files = glob.glob("*.txt")

Is there an equivalent way to do this in the UNIX environment? I know I can read in one file by

infile=sys.stdin

but as far as reading all in from one directory I'm not sure.

Thanks!