for python 2.7

(50 Points) Write a program that concatenates the contents of several files into one file. For example, $ python catfiles.py chapter1.txt chapter2.txt chapter3.txt book.txt makes a long file book.txt that contains the contents of the files chapterl.txt, chapter2.txt, and chapter3.txt. The target file is always the last file specified on the command line. The following code demonstrates simple command line argument passing: from sys import argv if len(argv)