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? in_file = open(from_file) indata = in_file.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() out_file = open(to_file, 'w') out_file.write(indata) print "Alright, all done." out_file.close() in_file.close(
I don't quite get why it is necessary to create a new variable called indata.why in_file alone isn't enough to use with .read()? I tried removing the indata and replace it with in_file but I get an error.can someone explain those to me?