#!/usr/bin/env python
"""
This script extracts .tar, .tar.gz, .tar.bz2, .gz and .zip archives 
"""
import sys
import os

def unpack(s):
    if (s.find('.tar.gz') != -1):
        os.system("tar -xvvzf " + filename)
    elif (s.find('.tar.bz2') != -1):
        os.system("tar -xvvjf " + filename)
    elif (s.find('.tar') != -1):
        os.system("tar -xvvf " + filename)
    elif (s.find('.gz') != -1):
        os.system("gunzip" + filename)
    elif (s.find('.zip') != -1):
        os.system("unzip " + filename)
    else: 
        print "Wrong archive or filename"

try:
    filename = sys.argv[1]
    unpack(filename)
except IndexError:
    print "Invalid filename"