ex15.py

from sys import argv
# This gives us script and filename as variables to use
#     which are given when the script is called.
script, filename = argv

# This assigns open(filename) to the function txt.
txt = open(filename)

# This prints our line and calls to print the raw data
#     given from filename.
print "Here's your file %r:" % filename
# This tells txt to read (print) the file.
print txt.read()

# Notes
#
#    I'm not sure why I can't replace txt.read() with
#    open(filename).read() and have it work the same way...