Python学习17：使用Python拷贝文本文件

dog1888

# -- coding: utf-8 --　　from sys import argv
　　from os.path import exists
　　script, from_file, to_file = argv
　　print "Copying from %s to %s " % (from_file, to_file)
　　# we could do these two on one line too, how?
　　# input = open(from_file)
　　# indata = input.read()
　　indata = open(from_file).read()
　　#print "Here is indata: %r" % indata
　　#print
　　#print indata
　　print "The input file is %d bytes long" % len(indata)
　　print "Does the output file exists? %r" % exists(to_file)
　　print "Ready, hit RETURN to continue, CTRL-C to abort."
　　raw_input("RETURN or CTRL-C > ")
　　# 如果to_file不存在的话，程序会自动在脚本当前目录创建文件，文件名为你给的第二个参数
　　output = open(to_file, 'w')
　　output.write(indata)
　　print "Alright, all done."
　　output.close()
　　print
　　print indata