Tail-Challenge

gistfile1.txt

import argparse
import sys

parser = argparse.ArgumentParser(description="Tail Substitute")
parser.add_argument('lines', type=int, default=10, nargs='?',
        help="Number of lines to print, default is 10")
args = parser.parse_args()

input_stream = []
for line in sys.stdin:
    input_stream.append(line)

for line in input_stream[len(input_stream) - args.lines:len(input_stream)]:
    print line