请把下列代码改成一行代码，请让我见证奇迹，好吗？

[zyqf]

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()

print "The input file is %d bytes long" % len(indata)

print "Does the output file exist? %r" % exists(to_file)
print "Ready, hit RETURN to continue, CTRL-C to abort."
raw_input()

output = open(to_file, 'w')
output.write(indata)

print "Alright, all done."

output.close()
input.close()

作者说，他能用一行代码写出来。。。。

[goldalan]

from sys import argv;open(argv[2], 'w').write(open(argv[1]).read());print("Great")