#!/usr/bin/env python

# import required modules:
#
import os
import sys

# decode the command line argument
#
print("--- decoding the command line argument ---")
print("the program name is %s" % (sys.argv[0]))
print("the name of the file to be processed is %s" % (sys.argv[1]))
print("--- done decoding the command line argument ---")

# open a file, read each line, and strip the last character on each
# line, which is a line feed
#
print("--- reading a file ---")
lines = [line.rstrip('\n') for line in open(sys.argv[1])]
print("--- done reading a file ---")

# print the contents as a list
#
print("--- printing the contents ---")
print(lines)
print("--- done printing ---")

# print the contents line by line
#
print("--- printing line by line ---")
counter = int(0)
for line in lines:
    print("line no. %d: %s" % (counter, line))
    counter += int(1)
print("--- done printing ---")

#
# end of file