《笨办法学python》加分习题17——我的答案

《笨办法学python》加分习题17——我的答案

这是我自己学习的答案，会尽力写的比较好。还望大家能够提出我的不足和错误，谢谢！

文中例题：

from sys import argv
from os.path import existsscript, frome_file, to_file = argvprint "Coping from %s to %s" % (frome_file, to_file)# we could do these two on one line too, how?
input = open(frome_file)
indata = ad()print "The input file is %d bytes long" % len(indata)print "Does the output file exist? %r"