Learn Python The Hard Way学习(14) - 提示和传递

让我们做一个把argv和raw_input结合使用的例子，为下个例子学习读写文件打下基础。在这个例子中，raw_input只给了一个简单的提示，有点像游戏Zork或者Adventure。

from sys import argvscript, user_name = argvprompt = '> 'print "Hi %s, I'm the %s script." % (user_name, script)print "I'd like to ask you a few questions."print "Do you like me %s?" % user_namelikes = raw_input(prompt)print "Where do you live %s?" % user_namelives = raw_input(prompt)print "What kind of computer do you have?"computer = raw_input(prompt)print """Alright, so you said %r about liking me.You live in %r, Not sure where that is.And you have a %r computer, Nice.""" % (likes, lives, computer)

我们设置了一个prompt变量，在raw_input中做参数，这样就不用每次都写这个参数了，而且修改的时候修改一个地方就可以了，很方便吧。

运行结果

root@he-desktop:~/mystuff# python ex14.py eric

Hi eric, I'm the ex14.py script.

I'd like to ask you a few questions.

Do you like me eric?

> yes

Where do you live eric?

> China

What kind of computer do you have?

> Candy

Alright, so you said 'yes' about liking me.

You live in 'China', Not sure where that is.

And you have a 'Candy' computer, Nice.

root@he-desktop:~/mystuff# 

加分练习

1. 找Zork和Adventure游戏来玩玩。

2. 改变变量prompt，然后重新执行一次。

3. 添加一个其他的参数到程序中。

4. 确认弄懂了"""表示多行输出，%是表示格式化媒介。