ex15.py ex15_sample.txt

from sys import argv

script, filename = argv

txt = open(filename)

print "Here's your file %r:" % filename
print txt.read()

print "Type the filename again:"
file_again = raw_input("> ") # file_again is an assignment of the raw_input() prompt

txt_again = open(file_again)

print txt_again.read()