以艰难的方式学习 Python 练习 17 额外问题 [英] Learn Python the Hard Way Exercise 17 Extra Question(S)

问题描述

我正在学习 Zed Shaw 的精彩Learn Python The Hard Way，但一个额外的问题让我难住了:第 9 行--10 可以写成一行，怎么写?我尝试了一些不同的想法，但都无济于事.我可以继续前进，但这样做有什么乐趣?

I'm doing Zed Shaw's fantastic Learn Python The Hard Way, but an extra question has me stumped: Line 9--10 could be written in one line, how? I've tried some different thoughts, but to no avail. I could move on, but what would the fun in that be?

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."

Zed 还写道，他可以在一行中完成整个脚本.我不太清楚他的意思.

Zed also writes that he could do the whole script in one line. I'm not exactly sure what he means by that.

请随意帮助我:通过给出答案或只是暗示——并且可能包括对问题的折叠或隐藏答案.

Feel free to help me however you want: by giving the answer or merely hinting---and perhaps including a collapsed or hidden answer to the question.

推荐答案

indata = open(from_file).read()

这篇关于以艰难的方式学习 Python 练习 17 额外问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！